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; ============================================================================
;        __
;   \\__/ o\    (C) 2015  Robert Finch, Stratford
;    \  __ /    All rights reserved.
;     \/_//     robfinch<remove>@finitron.ca
;       ||
;  
;
; This source file is free software: you can redistribute it and/or modify 
; it under the terms of the GNU Lesser General Public License as published 
; by the Free Software Foundation, either version 3 of the License, or     
; (at your option) any later version.                                      
;                                                                          
; This source file is distributed in the hope that it will be useful,      
; but WITHOUT ANY WARRANTY; without even the implied warranty of           
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the            
; GNU General Public License for more details.                             
;                                                                          
; You should have received a copy of the GNU General Public License        
; along with this program.  If not, see <http://www.gnu.org/licenses/>.    
;
;
; ============================================================================


DBG_DS          = $5000
DBG_ATTR        = %000011000_111111110_0000000000

                bss
                org             $1000
DBGBuf          fill.b  84,0
DBGBufndx       db              0

                code
                org             $FFFFC800

;------------------------------------------------------------------------------
; r2 = text output column
; r6 = text output row
; r5 = disassembly address
;------------------------------------------------------------------------------

public Debugger:
                sys             #190                            ; save context
                ldi             sp,#$2bf8
                addui   sp,sp,#-24
                sws             c1,[sp]
                sws             ds,8[sp]
                sws             ds.lmt,16[sp]
                ldis    ds,#DBG_DS
                ldis    ds.lmt,#$8000
                sws             ds,zs:IOFocusNdx_
                sync
                bsr             KeybdClearBuf
                bsr             VideoInit2
                bsr             VBClearScreen
                mov             r1,r0                           ; row = 0
                mov             r2,r0                           ; col = 0
                ldi             r6,#2                           ; set cursor pos
                sys             #10                                     ; call video BIOS
;               bsr             DBGRamTest
                lla             r1,cs:msgDebugger       ; convert address to linear
                ldi             r6,#$14                         ; Try display string
                sys             #10                                     ; call video BIOS
                mov             r6,r0
                mov             r2,r0
                ldi             r5,#$FFFF8000
                bsr             DBGDisassem20
;               br              Debugger_exit

promptAgain:
                ; Clear input buffer
                sb              r0,DBGBufndx
                ldis    lc,#$14                 ; (21-1)*4
                ldi             r1,#DBGBuf
                ldi             r2,#0                   ; 
                stset.hi        r2,[r1]         ; clear the buffer
                
                ldi             r6,#30                  ; move cursor pos to row 30
                bsr             DBGPrompt

                ; Get character loop
.0001:
                bsr             KeybdGetCharWait
                cmpi    p0,r1,#CR
p0.eq   br              .processInput
                cmpi    p0,r1,#_BS
p0.eq   br              .backspace
                cmpi    p0,r1,#' '
p0.ltu  br              .0001
                ; some other character, store in buffer if it will fit
                lbu             r3,DBGBufndx
                cmpi    p3,r3,#80               ; max 80 chars
p3.ltu  bsr             DBGDispChar
p3.ltu  sb              r1,DBGBuf[r3]
p3.ltu  addui   r3,r3,#1
p3.ltu  sb              r3,DBGBufndx
                br              .0001
.backspace:
                lbu             r1,DBGBufndx
                tst             p0,r1                   ; is is even possible to backspace ?
p0.eq   br              .0001
                ldi             r7,#$80
                subu    r7,r7,r1
                addui   r7,r7,#-1               ; loop count is one less
                mtspr   lc,r7
                addui   r1,r1,#DBGBuf
                mov             r4,r1
                addui   r1,r1,#-1
                mov             r3,r0
                stmov.bi        [r4],[r1],r3

                br              .0001
.processInput:
                mov             r4,r0
.0002:
                lbu             r1,DBGBuf[r4]
                tst             p0,r1
p0.eq   br              promptAgain
                cmpi    p0,r1,#' '
p0.leu  addui   r4,r4,#1
p0.leu  br              .0002
                cmpi    p0,r1,#'D'
p0.eq   addui   r4,r4,#1
p0.eq   br              DoDisassem
                cmpi    p0,r1,#'M'
p0.eq   br              DBGDumpMem
                cmpi    p0,r1,#'x'
p0.eq   br              Debugger_exit
                br              promptAgain
Debugger_exit:
                lws             c1,[sp]
                lws             ds,8[sp]
                lws             ds.lmt,16[sp]
                sws             ds,zs:IOFocusNdx_
                sys             #191                    ; restore context
                rts
endpublic

;------------------------------------------------------------------------------
;------------------------------------------------------------------------------

DoDisassem:
                bsr             DBGGetHexNumber
                tst             p0,r8
p0.eq   br              promptAgain
                mov             r5,r1
                bsr             VBClearScreen2
                bsr             DBGDisassem20
                br              promptAgain

;------------------------------------------------------------------------------
; Dump memory bytes
; M <start address>
;------------------------------------------------------------------------------

DBGDumpMem:
                addui   r4,r4,#1                        ; advance a character past 'M'
                bsr             DBGGetHexNumber
                mov             r12,r1
                tst             p0,r8
p0.eq   jmp             promptAgain
                bsr             VBClearScreen2
                addui   r13,r12,#200
                ldi             r6,#2
                mov             r2,r0
.0002:
                mov             r14,r0
                ldi             r1,#'>'
                bsr             DBGDispChar
                mov             r4,r12
                bsr             DBGDisplayHalf
.0001:
                bsr             space1
                lbu             r4,zs:[r12+r14]
                bsr             DBGDisplayByte
                addui   r14,r14,#1
                cmpi    p0,r14,#8
p0.ltu  br              .0001
                bsr             space1
                mov             r14,r0
                bsr             ReverseVideo            ; reverse video attribute
.0003:
                lbu             r1,zs:[r12+r14]
                cmpi    p0,r1,#' '
p0.ltu  ldi             r1,#'.'
                bsr             DBGDispChar
                addui   r14,r14,#1
                cmpi    p0,r14,#8
p0.ltu  br              .0003
                bsr             ReverseVideo            ; put video back to normal
                addui   r6,r6,#1
                addu    r12,r12,r14
                cmp             p0,r12,r13
p0.ltu  br              .0002
                jmp             promptAgain
                
;------------------------------------------------------------------------------
; DBGGetHexNumber:
;       Get a hexi-decimal number from the input buffer.
;
; Parameters:
;       r4 = text pointer (updated)
; Returns:
;       r1 = number
;   r8 = number of digits
;------------------------------------------------------------------------------

DBGGetHexNumber:
                addui   sp,sp,#-8
                sws             c1,[sp]
                ldis    lc,#80                  ; max 80 chars
                mov             r7,r0                   ; working accum.
                mov             r8,r0                   ; number of digits
.0003:
                lbu             r1,[r4]                 ; skip leading spaces
                cmpi    p0,r1,#' '
p0.leu  addui   r4,r4,#1
p0.leu  br              .0003
.0002:
                lbu             r1,[r4]
                bsr             DBGCharToHex
                tst             p0,r3
p0.eq   br              .0001
                shli    r7,r7,#4
                or              r7,r7,r1
                addui   r4,r4,#1
                addui   r8,r8,#1
                loop    .0002
.0001:
                mov             r1,r7
                lws             c1,[sp]
                addui   sp,sp,#8
                rts

;------------------------------------------------------------------------------
; DBGCharToHex:
;       Convert a single ascii character to hex nybble.
; Parameters:
;       r1 = ascii character to convert
; Returns:
;       r1 = binary nybble
;       r3 = 1 if conversion successful, 0 otherwise
;------------------------------------------------------------------------------

DBGCharToHex:
                cmpi    p0,r1,#'0'
p0.ltu  br              .0004
                cmpi    p0,r1,#'9'
p0.gtu  br              .0001
                addui   r1,r1,#-'0'
                ldi             r3,#1
                rts
.0001:
                cmpi    p0,r1,#'A'
p0.ltu  br              .0004
                cmpi    p0,r1,#'F'
p0.gtu  br              .0003
                subui   r1,r1,#'A'-10
                ldi             r3,#1
                rts
.0003:
                cmpi    p0,r1,#'a'
p0.ltu  br              .0004
                cmpi    p0,r1,#'f'
p0.gtu  br              .0004
                subui   r1,r1,#'a'-10
                ldi             r3,#1
                rts
.0004:
                mov             r3,r0
.exit:
                rts

;------------------------------------------------------------------------------
;------------------------------------------------------------------------------

public DebugIRQ:
                sw              sp,reg_save+8*27
                ldi             sp,#$2bf8
                addui   sp,sp,#-104
                sws             c1,[sp]
                sws             ds,8[sp]
                sws             ds.lmt,16[sp]
                sw              r1,24[sp]
                sw              r2,32[sp]
                sw              r3,40[sp]
                sw              r4,48[sp]
                sw              r5,56[sp]
                sw              r6,64[sp]
                sw              r7,72[sp]
                sw              r8,80[sp]
                sw              r9,88[sp]
                sw              r10,96[sp]

                ldis    ds,#DBG_DS
                ldis    ds.lmt,#$8000
                sync
                bsr             VBClearScreen2
                mov             r2,r0
                mov             r6,r0
                ldi             r1,#msgDebugger
                bsr             DBGDispString
                mfspr   r5,dpc
                bsr             DBGDisassem20

                lws             c1,[sp]
                lws             ds,8[sp]
                lws             ds.lmt,16[sp]
                lw              r1,24[sp]
                lw              r2,32[sp]
                lw              r3,40[sp]
                lw              r4,48[sp]
                lw              r5,56[sp]
                lw              r6,64[sp]
                lw              r7,72[sp]
                lw              r8,80[sp]
                lw              r9,88[sp]
                lw              r10,96[sp]
                lw              sp,reg_save+8*27
                rtd     
endpublic

;------------------------------------------------------------------------------
; Disassemble 20 lines of code.
;------------------------------------------------------------------------------

DBGDisassem20:
                addui   sp,sp,#-8
                sws             c1,[sp]
                ldis    lc,#19
                ldi             r6,#3
.0001:
                bsr             Disassem
                addu    r5,r5,r10
                addui   r6,r6,#1
                loop    .0001
                lws             c1,[sp]
                addui   sp,sp,#8
                rts

;------------------------------------------------------------------------------
;------------------------------------------------------------------------------

DBGPrompt:
                addui   sp,sp,#-8
                sws             c1,[sp]
                mov             r2,r0
                ldi             r1,#'D'
                bsr             DBGDispChar
                ldi             r1,#'B'
                bsr             DBGDispChar
                ldi             r1,#'G'
                bsr             DBGDispChar
                ldi             r1,#'>'
                bsr             DBGDispChar
                lws             c1,[sp]
                addui   sp,sp,#8
                rts

;------------------------------------------------------------------------------
;------------------------------------------------------------------------------

Disassem:
                addui   sp,sp,#-16
                sws             c1,[sp]
                sws             c2,8[sp]
                ldi             r2,#1                           ; column one
                bsr             DisplayAddr
                bsr             DisplayBytes
                ldi             r2,#38                          ; tab to column 38
                bsr             DBGDisplayPred
                ldi             r2,#46                          ; tab to column 46
                mov             r3,r0
                lbu             r1,zs:[r5]
                cmpi    p0,r1,#$00
p0.eq   ldi             r3,#mne_brk
                cmpi    p0,r1,#$10
p0.eq   ldi             r3,#mne_nop
                cmpi    p0,r1,#$11
p0.eq   ldi             r3,#mne_rts
                cmpi    p0,r1,#$20
p0.eq   ldi             r3,#mne_imm
                cmpi    p0,r1,#$30
p0.eq   ldi             r3,#mne_imm
                cmpi    p0,r1,#$40
p0.eq   ldi             r3,#mne_imm
                cmpi    p0,r1,#$50
p0.eq   ldi             r3,#mne_imm
                cmpi    p0,r1,#$60
p0.eq   ldi             r3,#mne_imm
                cmpi    p0,r1,#$70
p0.eq   ldi             r3,#mne_imm
                cmpi    p0,r1,#$80
p0.eq   ldi             r3,#mne_imm
                tst             p0,r3
p0.ne   bsr             DBGDisplayMne
p0.eq   br              .0001
                br              .exit
.0001:
                lbu             r1,zs:1[r5]             ; get the opcode
                shli    r1,r1,#1
                lcu             r1,cs:DBGInsnMne[r1]
                cmpi    p0,r1,#$FFF0
p0.geu  br              .0002
.dispMne:
                ori             r3,r1,#Debugger & $FFFF0000     ; set high order address bits
                bsr             DBGDisplayMne
                br              .dispOper
.0002:
                andi    r1,r1,#15
                lcu             r3,cs:DBGInsnMneT[r1]
                ori             r3,r3,#Debugger & $FFFF0000
                bsr             DBGGetFunc
                lcu             r3,cs:[r3+r1*2]
                br              .dispMne
.dispOper:
                lbu             r1,zs:1[r5]
                lbu             r1,cs:DBGOperFmt[r1]
                jci             c1,cs:DBGOperFmtT[r1]
                ldi             r1,#48
                sc              r1,hs:LEDS
;               lcu             r1,cs:DBGOperFmtT[r1]
;               ori             r1,r1,#Debugger & $FFFF0000
;               mtspr   c2,r1
;               jsr             [c2]
.exit:
                lws             c1,[sp]
                lws             c2,8[sp]
                addui   sp,sp,#16
                rts

;------------------------------------------------------------------------------
; Display the disassembly address.
;------------------------------------------------------------------------------

DisplayAddr:
                addui   sp,sp,#-8
                sws             c1,[sp]
                mov             r4,r5
                bsr             DBGDisplayHalf
                bsr             space3
                lws             c1,[sp]
                addui   sp,sp,#8
                rts
space1:
                addui   sp,sp,#-8
                sws             c1,[sp]
                ldi             r1,#' '
                bsr             DBGDispChar
                lws             c1,[sp]
                addui   sp,sp,#8
                rts
space3:
                addui   sp,sp,#-8
                sws             c1,[sp]
                bsr             space1
                bsr             space1
                bsr             space1
                lws             c1,[sp]
                addui   sp,sp,#8
                rts

;------------------------------------------------------------------------------
;------------------------------------------------------------------------------

DBGDisplayHalf:
                addui   sp,sp,#-8
                sws             c1,[sp]
                rori    r4,r4,#16
                bsr             DBGDisplayCharr
                roli    r4,r4,#16
                bsr             DBGDisplayCharr
                lws             c1,[sp]
                addui   sp,sp,#8
                rts

DBGDisplayCharr:
                addui   sp,sp,#-8
                sws             c1,[sp]
                rori    r4,r4,#8
                bsr             DBGDisplayByte
                roli    r4,r4,#8
                bsr             DBGDisplayByte
                lws             c1,[sp]
                addui   sp,sp,#8
                rts

DBGDisplayByte:
                addui   sp,sp,#-8
                sws             c1,[sp]
                rori    r4,r4,#4
                bsr             DBGDisplayNybble
                roli    r4,r4,#4
                bsr             DBGDisplayNybble
                lws             c1,[sp]
                addui   sp,sp,#8
                rts

DBGDisplayNybble:
                addui   sp,sp,#-8
                sws             c1,[sp]
                andi    r1,r4,#15
                cmpi    p0,r1,#9
p0.gtu  addui   r1,r1,#7
                addui   r1,r1,#'0'
                bsr             DBGDispChar
                lws             c1,[sp]
                addui   sp,sp,#8
                rts

;------------------------------------------------------------------------------
; DBGDispChar:
;
; Display a character on the debug screen.
;
; Parameters:
;       r1 = character to display
;       r2 = text column
;       r6 = text row
; Returns:
;       r2 incremented
;------------------------------------------------------------------------------

DBGDispChar:
                addui   sp,sp,#-16
                sws             c1,[sp]                         ; save return address
                sw              r7,8[sp]                        ; save r7 work register
                andi    r1,r1,#$7F                      ; make sure in range
                bsr             VBAsciiToScreen         ; convert to screen char
                ori             r1,r1,#DBG_ATTR         ; add in attribute
                lcu             r7,Textcols                     ; figure out memory index
                mulu    r7,r6,r7                        ; row * num cols
                _4addui r7,r7,#$10000   ; + text base + (row * num cols) * 4
                _4addu  r7,r2,r7                        ; + column * 4
                sh              r1,hs:[r7]                      ; store the char
                addui   r2,r2,#1                        ; increment text position
                lws             c1,[sp]                         ; restore return address
                lw              r7,8[sp]
                addui   sp,sp,#16
                rts

;------------------------------------------------------------------------------
; Display a string of text on the debug screen.
;------------------------------------------------------------------------------

DBGDispString:
                addui   sp,sp,#-16
                sws             c1,[sp]
                sw              r7,8[sp]
                mov             r7,r1
.0001:
                lbu             r1,zs:[r7]
                tst             p0,r1
p0.eq   br              .0002
                bsr             DBGDispChar
                addui   r7,r7,#1
                br              .0001
.0002:
                lws             c1,[sp]
                lw              r7,8[sp]
                addui   sp,sp,#16
                rts
                
;------------------------------------------------------------------------------
; Get the length of an instruction.
;------------------------------------------------------------------------------

public DBGGetInsnLength:
                addui   r31,r31,#-8
                sws             c1,[r31]
                lbu             r1,zs:[r5]
                ; Test for special predicate values which are one byte long.
                cmpi    p0,r1,#$00              ; BRK
p0.eq   ldi             r1,#1
p0.eq   br              .0001
                cmpi    p0,r1,#$10              ; NOP
p0.eq   ldi             r1,#1
p0.eq   br              .0001
                cmpi    p0,r1,#$11              ; RTS
p0.eq   ldi             r1,#1
p0.eq   br              .0001
                ; Test for special immediate predicates these vary in length.
                cmpi    p0,r1,#$20
p0.eq   ldi             r1,#2
p0.eq   br              .0001
                cmpi    p0,r1,#$30
p0.eq   ldi             r1,#3
p0.eq   br              .0001
                cmpi    p0,r1,#$40
p0.eq   ldi             r1,#4
p0.eq   br              .0001
                cmpi    p0,r1,#$50
p0.eq   ldi             r1,#5
p0.eq   br              .0001
                cmpi    p0,r1,#$60
p0.eq   ldi             r1,#6
p0.eq   br              .0001
                cmpi    p0,r1,#$70
p0.eq   ldi             r1,#7
p0.eq   br              .0001
                cmpi    p0,r1,#$80
p0.eq   ldi             r1,#8
p0.ne   lbu             r1,zs:1[r5]
p0.ne   lbu             r1,cs:DBGInsnLength[r1]
.0001:
                lws             c1,[r31]
                addui   r31,r31,#8
                rts
endpublic

;------------------------------------------------------------------------------
; Display the bytes associated with an instruction. There may be up to eight
; bytes displayed.
;       r7 = offset from r5 the dump address
;------------------------------------------------------------------------------

DisplayBytes:
                addui   sp,sp,#-24
                sws             c1,[sp]
                sws             lc,8[sp]
                sw              r7,16[sp]
                sei
                ldi             r31,#INT_STACK
                bsr             DBGGetInsnLength
                mov             r10,r1
                cli
                addui   r1,r1,#-1               ; loop count is one less
                mtspr   lc,r1
                mov             r7,r0
.next:
                lbu             r4,zs:[r5+r7]
                bsr             DBGDisplayByte
                bsr             space1                  ; skip a space
                addui   r7,r7,#1                ; increment offset to next byte
                loop    .next
                lws             c1,[sp]
                lws             lc,8[sp]
                lw              r7,16[sp]
                addui   sp,sp,#24
                rts

;------------------------------------------------------------------------------
; Display a predicate.
;
; The always true predicate and special predicate values don't display.
;------------------------------------------------------------------------------

DBGDisplayPred:
                addui   sp,sp,#-8
                sws             c1,[sp]
                lbu             r1,zs:[r5]
                cmpi    p0,r1,#$00              ; brk special
p0.eq   br              .noDisp 
                cmpi    p0,r1,#$01              ; always true predicate doesn't display
p0.eq   br              .noDisp
                cmpi    p0,r1,#$11              ; rts special
p0.eq   br              .noDisp
                cmpi    p0,r1,#$10              ; nop special
p0.eq   br              .noDisp
                cmpi    p0,r1,#$20
p0.eq   br              .noDisp
                cmpi    p0,r1,#$30
p0.eq   br              .noDisp
                cmpi    p0,r1,#$40
p0.eq   br              .noDisp
                cmpi    p0,r1,#$50
p0.eq   br              .noDisp
                cmpi    p0,r1,#$60
p0.eq   br              .noDisp
                cmpi    p0,r1,#$70
p0.eq   br              .noDisp
                cmpi    p0,r1,#$80
p0.eq   br              .noDisp
                ldi             r1,#'p'
                bsr             DBGDispChar
                lbu             r4,zs:[r5]
                shrui   r4,r4,#4
                bsr             DBGDisplayNybble
                ldi             r1,#'.'
                bsr             DBGDispChar
                lbu             r1,zs:[r5]
                bsr             DBGDispCond
                br              .exit
.noDisp:
                addui   r2,r2,#7
.exit
                lws             c1,[sp]
                addui   sp,sp,#8
                rts

;------------------------------------------------------------------------------
; Display the condition portion of the predicate.
;------------------------------------------------------------------------------

DBGDispCond:
                addui   sp,sp,#-8
                sws             c1,[sp]
                andi    r7,r1,#15
                addu    r7,r7,r7
                addu    r7,r7,r1
                lbu             r1,cs:DBGPredCons[r7]
                bsr             DBGDispChar
                lbu             r1,cs:DBGPredCons+1[r7]
                bsr             DBGDispChar
                lbu             r1,cs:DBGPredCons+2[r7]
                bsr             DBGDispChar
                lws             c1,[sp]
                addui   sp,sp,#8
                rts

;------------------------------------------------------------------------------
; Display a mnemonic.
; Parameters:
;       r3 = pointer to mnemonic string
;------------------------------------------------------------------------------

DBGDisplayMne:
                addui   sp,sp,#-8
                sws             c1,[sp]
                bsr             space1
                ; Mnemonics are always at least 2 chars
                lbu             r1,cs:[r3]
                bsr             DBGDispChar
                ; second char
                lbu             r1,cs:1[r3]
                biti    p1,r1,#$80                      ; test high bit
                bsr             DBGDispChar
p1.ne   br              .exit
                ; third char
                lbu             r1,cs:2[r3]
                biti    p1,r1,#$80                      ; test high bit
                bsr             DBGDispChar
p1.ne   br              .exit
                ; fourth char
                lbu             r1,cs:3[r3]
                biti    p1,r1,#$80                      ; test high bit
                bsr             DBGDispChar
p1.ne   br              .exit
                ; fifth char
                lbu             r1,cs:4[r3]
                bsr             DBGDispChar
.exit:
                addui   r2,r2,#1                        ; 1 space
                lws             c1,[sp]
                addui   sp,sp,#8
                rts

;------------------------------------------------------------------------------
; Display a register
;------------------------------------------------------------------------------

DBGDispReg:
                addui   sp,sp,#-16
                sws             c1,[sp]
                sw              r7,8[sp]
                mov             r7,r1
                ldi             r1,#'r'
DBGDispBx1:
                bsr             DBGDispChar
                cmpi    p0,r7,#10
p0.geu  divui   r1,r7,#10
p0.geu  addui   r1,r1,#'0'
p0.geu  bsr             DBGDispChar
                modui   r1,r7,#10
                addui   r1,r1,#'0'
                bsr             DBGDispChar
                lws             c1,[sp]
                lw              r7,8[sp]
                addui   sp,sp,#16
                rts

;------------------------------------------------------------------------------
; Display a bit number
;------------------------------------------------------------------------------

DBGDispBReg:
                addui   sp,sp,#-16
                sws             c1,[sp]
                sw              r7,8[sp]
                mov             r7,r1
                ldi             r1,#'b'
                br              DBGDispBx1

;------------------------------------------------------------------------------
; Display a special purpose register
;------------------------------------------------------------------------------

DBGDispSpr:
                addui   sp,sp,#-16
                sws             c1,[sp]
                sw              r7,8[sp]
                addu    r7,r1,r1
                addu    r7,r7,r1                        ; r7 = r1 * 3
                lbu             r1,cs:DBGSpr[r7]
                bsr             DBGDispChar
                lbu             r1,cs:DBGSpr+1[r7]
                bsr             DBGDispChar
                lbu             r1,cs:DBGSpr+2[r7]
                cmpi    p0,r1,#' '
p0.ne   bsr             DBGDispChar
                lws             c1,[sp]
                lw              r7,8[sp]
                addui   sp,sp,#16
                rts

;------------------------------------------------------------------------------
;------------------------------------------------------------------------------

DBGComma:
                addui   sp,sp,#-8
                sws             c1,[sp]
                ldi             r1,#','
                bsr             DBGDispChar
                lws             c1,[sp]
                addui   sp,sp,#8
                rts

;------------------------------------------------------------------------------
; Display registers for TST instruction.
;------------------------------------------------------------------------------

DBGDispTstregs:
                addui   sp,sp,#-8
                sws             c1,[sp]
                ldi             r2,#54                  ; tab out to column 54
                lbu             r1,zs:1[r5]
                andi    r1,r1,#15
                bsr             DBGDispSpr
                bsr             DBGComma
                lbu             r1,zs:2[r5]
                andi    r1,r1,#$3f
                bsr             DBGDispReg
                lws             c1,[sp]
                addui   sp,sp,#8
                rts

DBGDispCmpregs:
                addui   sp,sp,#-8
                sws             c1,[sp]
                ldi             r2,#54                  ; tab out to column 54
                lbu             r1,zs:1[r5]
                andi    r1,r1,#15
                bsr             DBGDispSpr
                bsr             DBGComma
                lbu             r1,zs:2[r5]
                andi    r1,r1,#$3f
                bsr             DBGDispReg
                bsr             DBGComma
                lbu             r1,zs:2[r5]
                shrui   r1,r1,#6
                lbu             r7,zs:3[r5]
                andi    r7,r7,#15
                shli    r7,r7,#2
                or              r1,r7,r1
                bsr             DBGDispReg
                lws             c1,[sp]
                addui   sp,sp,#8
                rts

DBGDispBrDisp:
                addui   sp,sp,#-8
                sws             c1,[sp]
                ldi             r2,#54                  ; tab out to column 54
                lbu             r1,zs:1[r5]
                lbu             r7,zs:2[r5]
                andi    r1,r1,#15
                shli    r7,r7,#4
                or              r1,r7,r1
                addui   r1,r1,#3                ; instruction size
                addu    r4,r1,r5                ; instruction address
                ldi             r1,#'$'
                bsr             DBGDispChar
                bsr             DBGDisplayHalf
                lws             c1,[sp]
                addui   sp,sp,#8
                rts

DBGDispCmpimm:
                addui   sp,sp,#-8
                sws             c1,[sp]
                ldi             r2,#54                  ; tab out to column 54
                lbu             r1,zs:1[r5]
                andi    r1,r1,#15
                bsr             DBGDispSpr
                bsr             DBGComma
                lbu             r1,zs:2[r5]
                andi    r1,r1,#$3f
                bsr             DBGDispReg
                bsr             DBGComma
                lbu             r1,zs:2[r5]
                shrui   r1,r1,#6
                lbu             r7,zs:3[r5]
                shli    r7,r7,#2
                or              r4,r7,r1
                ldi             r1,#'#'
                bsr             DBGDispChar
                ldi             r1,#'$'
                bsr             DBGDispChar
                bsr             DBGDisplayHalf
                lws             c1,[sp]
                addui   sp,sp,#8
                rts

; Used by mtspr
DBGDispSprRx:
                addui   sp,sp,#-16
                sws             c1,[sp]
                sw              r7,8[sp]
                ldi             r2,#54                  ; tab out to column 54
                lbu             r1,zs:2[r5]
                lbu             r7,zs:3[r5]
                shrui   r1,r1,#6
                andi    r7,r7,#15
                shli    r7,r7,#2
                or              r1,r7,r1
                bsr             DBGDispSpr
                bsr             DBGComma
                lbu             r1,zs:2[r5]
                andi    r1,r1,#63
                bsr             DBGDispReg
                lws             c1,[sp]
                lw              r7,8[sp]
                addui   sp,sp,#16
                rts

; Format #4
;
DBGDispRxRxRx:
                addui   sp,sp,#-16
                sws             c1,[sp]
                sw              r7,8[sp]
                ldi             r2,#54                  ; tab out to column 54
                lbu             r1,zs:3[r5]
                shrui   r1,r1,#4
                lbu             r7,zs:4[r5]
                andi    r7,r7,#3
                shli    r7,r7,#4
                or              r1,r7,r1
                bsr             DBGDispReg
                bsr             DBGComma
                lbu             r1,zs:2[r5]
                andi    r1,r1,#63
                bsr             DBGDispReg
                bsr             DBGComma
                lbu             r1,zs:2[r5]
                shrui   r1,r1,#6
                lbu             r7,zs:3[r5]
                andi    r7,r7,#15
                shli    r7,r7,#2
                or              r1,r7,r1
                bsr             DBGDispReg
                lws             c1,[sp]
                lw              r7,8[sp]
                addui   sp,sp,#16
                rts

; Format #5
;
DBGDispRxRx:
                addui   sp,sp,#-16
                sws             c1,[sp]
                sw              r7,8[sp]
                ldi             r2,#54                  ; tab out to column 54
                lbu             r1,zs:2[r5]
                shrui   r1,r1,#6
                lbu             r7,zs:3[r5]
                andi    r7,r7,#15
                shli    r7,r7,#2
                or              r1,r7,r1
                bsr             DBGDispReg
                bsr             DBGComma
                lbu             r1,zs:2[r5]
                andi    r1,r1,#63
                bsr             DBGDispReg
                lws             c1,[sp]
                lw              r7,8[sp]
                addui   sp,sp,#16
                rts

; Format #6
;
DBGDispPxPxPx:
                addui   sp,sp,#-16
                sws             c1,[sp]
                sw              r7,8[sp]
                ldi             r2,#54                  ; tab out to column 54
                lbu             r1,zs:3[r5]
                shrui   r1,r1,#4
                lbu             r7,zs:4[r5]
                andi    r7,r7,#3
                shli    r7,r7,#4
                or              r1,r7,r1
                bsr             DBGDispBReg
                bsr             DBGComma
                lbu             r1,zs:2[r5]
                andi    r1,r1,#63
                bsr             DBGDispBReg
                bsr             DBGComma
                lbu             r1,zs:2[r5]
                shrui   r1,r1,#6
                lbu             r7,zs:3[r5]
                andi    r7,r7,#15
                shli    r7,r7,#2
                or              r1,r7,r1
                bsr             DBGDispBReg
                lws             c1,[sp]
                lw              r7,8[sp]
                addui   sp,sp,#16
                rts

; Format #7
;
DBGDispNone:
                rts

; Format #8 (biti)
;
DBGDispPxRxImm:
                addui   sp,sp,#-16
                sws             c1,[sp]
                ldi             r2,#54                  ; tab out to column 54
                lbu             r1,zs:2[r5]
                shrui   r1,r1,#6
                lbu             r7,zs:3[r5]
                andi    r7,r7,#3
                _4addu  r1,r7,r1
                bsr             DBGDispSpr      
                bsr             DBGComma
                lbu             r1,zs:2[r5]
                andi    r1,r1,#63
                bsr             DBGDispReg
                bsr             DBGComma
                lbu             r1,zs:3[r5]
                shrui   r1,r1,#4
                lbu             r7,zs:4[r5]
                _16addu r1,r7,r1
                bsr             DBGDispImm
                lws             c1,[sp]
                addui   sp,sp,#16
                rts

; Format #9 (adduis)
;
DBGDispRxImm:
                addui   sp,sp,#-8
                sws             c1,[sp]
                lbu             r1,zs:2[r5]
                andi    r1,r1,#63
                bsr             DBGDispReg
                bsr             DBGComma
                lbu             r1,zs:2[r2]
                shrui   r1,r1,#6
                lbu             r7,zs:3[r2]
                _4addu  r1,r7,r1
                bsr             DBGDispImm
                lws             c1,[sp]
                addui   sp,sp,#8
                rts

;------------------------------------------------------------------------------
; Display an immediate value.
;------------------------------------------------------------------------------

DBGDispImm:
                addui   sp,sp,#-16
                sws             c1,[sp]
                sw              r4,8[sp]
                mov             r4,r1
                ldi             r1,#'#'
                bsr             DBGDispChar
                ldi             r1,#'$'
                bsr             DBGDispChar
                cmpi    p0,r4,#$FFFF
p0.gtu  bsr             DBGDisplayHalf
p0.gtu  br              .exit
                cmpi    p0,r4,#$FF
p0.gtu  bsr             DBGDisplayCharr
p0.gtu  br              .exit
                bsr             DBGDisplayByte
.exit:
                lw              c1,[sp]
                lw              r4,8[sp]
                addui   sp,sp,#16
                rts

;------------------------------------------------------------------------------
; DBGGetFunc:
;    Get the function code bits from the instruction. These come from one of
; four different locations depending on the opcode.
;
; Parameters:
;       r1 = opcode group (0 to 15)
; Returns:
;       r1 = function code
;------------------------------------------------------------------------------

DBGGetFunc:
                jci             c0,cs:DBGFuncT[r1]
gf0:
gf2:
gf3:
gf4:
gf6:
gfB:
                lbu             r1,zs:4[r5]
                shrui   r1,r1,#2
                rts
gf1:
gf5:
gf7:
gf8:
                lbu             r1,zs:3[r5]
                shrui   r1,r1,#4
                rts
gf9:
                lbu             r1,zs:5[r5]
                andi    r1,r1,#15
                rts
gfA:
                lbu             r1,zs:2[r5]
                andi    r1,r1,#15
                rts

;------------------------------------------------------------------------------
; Checker-board RAM testing routine.
;
; Ram is tested from $6000 to $7FFFFFF. The first 24k of RAM is not tested,
; as 16k underlays the scratchpad RAM and is unaccessible and 8kb is used by
; the kernel.
;
; First uses the pattern AAAAAAAA to memory
;                        55555555
;
; Then uses the pattern  55555555 to memory
;                        AAAAAAAA
;------------------------------------------------------------------------------

DBGRamTest:
                addui   sp,sp,#-8
                sws             c1,[sp]
                ldi             r10,#$AAAAAAAA
                ldi             r11,#$55555555
                bsr             DBGRamTest1
                ldi             r10,#$55555555
                ldi             r11,#$AAAAAAAA
                bsr             DBGRamTest1
                lws             c1,[sp]
                addui   sp,sp,#8
                rts

;------------------------------------------------------------------------------
;------------------------------------------------------------------------------

DBGRamTest1:
                addui   sp,sp,#-8
                sws             c1,[sp]

                mov             r1,r10
                mov             r3,r11
                ldi             r5,#$6000
                ldi             lc,#$3FF3FF             ; (32MB - 24kB)/8 - 1
                mov             r8,r0
.0001:
                sh              r1,zs:[r5]
                sh              r3,zs:4[r5]
                addui   r5,r5,#8
                andi    r4,r5,#$FFF
                tst             p0,r4
p0.eq   shrui   r4,r5,#12
p0.eq   ldi             r2,#0
p0.eq   ldi             r6,#1
p0.eq   bsr             DBGDisplayCharr
                loop    .0001

                ldi             r5,#$6000
                ldi             lc,#$3FF3FF             ; (32MB - 24kB)/8 - 1
.0002:
                lh              r1,zs:[r5]
                lh              r3,zs:4[r5]
                cmp             p0,r1,r10
p0.ne   mov             r7,r1
p0.ne   bsr             DBGBadRam
                cmp             p0,r3,r11
p0.ne   mov             r7,r3
p0.ne   bsr             DBGBadRam
                addui   r5,r5,#8
                andi    r4,r5,#$FFF
                tst             p0,r4
p0.eq   shrui   r4,r5,#12
p0.eq   ldi             r2,#0
p0.eq   ldi             r6,#1
p0.eq   bsr             DBGDisplayCharr
                loop    .0002
                lws             c1,[sp]
                addui   sp,sp,#8
                rts

;------------------------------------------------------------------------------
; Dispay bad ram nessage with address and data.
;------------------------------------------------------------------------------

DBGBadRam:
                addui   sp,sp,#-8
                sws             c1,[sp]
                lla             r1,cs:msgBadRam
                ldi             r2,#0
                ldi             r6,#2
                addu    r6,r6,r8
                bsr             DBGDispString
                mov             r4,r5
                bsr             DBGDisplayHalf
                bsr             space1
                mov             r4,r7
                bsr             DBGDisplayHalf
                addui   r8,r8,#1
                andi    r8,r8,#15
                cmpi    p0,r8,#15
p0.eq   ldis    lc,#1
                lws             c1,[sp]
                addui   sp,sp,#8
                rts

msgBadRam:
        byte    "Menory failed at: ",0

;------------------------------------------------------------------------------
; Reverse the video attribute.
;------------------------------------------------------------------------------

ReverseVideo:
                lhu             r1,NormAttr
                shrui   r2,r1,#9
                shli    r3,r1,#9
                andi    r2,r2,#%111111111_0000000000
                andi    r3,r3,#%111111111_000000000_0000000000
                or              r1,r2,r3
                rts

;------------------------------------------------------------------------------
;------------------------------------------------------------------------------
; Tables
;------------------------------------------------------------------------------
;------------------------------------------------------------------------------

        align   2
DBGFuncT:
                dc              gf0,gf1,gf2,gf3,gf4,gf5,gf6,gf7,gf8,gf9,gfA,gfB,gf0,gf0,gf0,gf0

                align   2
DBGLineTbl:
                dc              0
                dc              1*84
                dc              2*84
                dc              3*84
                dc              4*84
                dc              5*84
                dc              6*84
                dc              7*84
                dc              8*84
                dc              9*84
                dc              10*84
                dc              11*84
                dc              12*84
                dc              13*84
                dc              14*84
                dc              15*84
                dc              16*84
                dc              17*84
                dc              18*84
                dc              19*84
                dc              20*84
                dc              21*84
                dc              22*84
                dc              23*84
                dc              24*84
                dc              25*84
                dc              26*84
                dc              27*84
                dc              28*84
                dc              29*84
                dc              30*84
                dc              31*84

; Table of the length of each instruction.
;
DBGInsnLength:
                byte    3,3,3,3, 3,3,3,3, 3,3,3,3, 3,3,3,3      ; TST
                byte    4,4,4,4, 4,4,4,4, 4,4,4,4, 4,4,4,4      ; CMP
                byte    4,4,4,4, 4,4,4,4, 4,4,4,4, 4,4,4,4      ; CMPI
                byte    3,3,3,3, 3,3,3,3, 3,3,3,3, 3,3,3,3      ; BR

                byte    5,4,5,1, 1,1,5,4, 5,5,5,5, 5,5,5,5
                byte    5,5,1,5, 5,5,1,1, 5,1,1,1, 1,1,1,1
                byte    1,1,1,1, 1,1,1,1, 1,1,1,5, 5,5,5,4
                byte    1,1,5,1, 1,1,1,4, 5,4,1,1, 1,1,1,1

                byte    5,5,5,5, 5,5,5,1, 1,1,1,5, 5,1,5,5
                byte    5,5,5,5, 1,1,5,6, 5,5,5,5, 1,4,5,4
                byte    3,5,6,3, 3,4,4,4, 4,4,6,4, 5,5,5,5
                byte    5,5,5,5, 5,5,5,1, 1,1,1,1, 1,1,1,1

                byte    5,5,5,5, 1,1,5,6, 3,5,3,5, 3,1,1,1
                byte    1,1,1,1, 1,1,1,1, 1,1,1,1, 1,1,1,1
                byte    1,1,1,1, 1,1,1,1, 1,1,1,1, 1,1,1,1
                byte    4,2,4,2, 2,5,4,2, 2,2,2,2, 2,1,1,2

; Table of operand format indexes
;
; 0 = px,rx
; 1 = px,rx,rx
; 2 = px,rx,#imm
; 3 = disp12
; 4 = rx,rx,rx
; 5 = rx,rx
; 6 = px,px,px
; 7 = none
; 8 = px,rx,#imm (biti)
; 9 = rx,#imm   (addui short)
; 10 = rx,rx,#imm
; 11 = mlo
; 12 = shift
; 13 = rx,#imm  (ldi)
; 14 = rx,rx,rx,rx      (mux format)
; 15 = rx,mem           (load/store)
; 16 = rx,rx,rx,[rx]    (cas)
; 17 = rx,[rx]          (stset)
; 18 = [rx],[rx],rx     (stmov/stcmp)
; 19 = rx,#imm  (cache)
; 20 = [cx]             jsr
; 21 = jsr
; 22 = jsr
; 23 = rts
; 24 = loop
; 25 = sys/int
; 26 = rx,spr
; 27 = spr,rx
; 28 = bitfield
; 29 = spr,spr
; 30 = rx,[rx+rx*sc]    (load/store)
; 31 = stix
; 32 = inc
; 33 = tlb
; 34 = rts
; 35 = bcd
; 36 = stp
; 37 = imm

DBGOperFmt:
                byte    0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0      ; TST   px,rx
                byte    1,1,1,1, 1,1,1,1, 1,1,1,1, 1,1,1,1      ; CMP   px,rx,rx
                byte    2,2,2,2, 2,2,2,2, 2,2,2,2, 2,2,2,2      ; CMPI  px,rx,#imm
                byte    3,3,3,3, 3,3,3,3, 3,3,3,3, 3,3,3,3      ; BR

                byte    4,5,6,7, 7,7,8,9, 10,10,10,10, 10,10,10,10
                byte    4,11,7,10, 10,10,7,7, 12,7,7,7, 7,7,7,7
                byte    7,7,7,7, 7,7,7,7, 7,7,7,10, 10,10,10,13
                byte    7,7,14,7, 7,7,7,5, 4,6,7,7, 7,7,7,7

                byte    15,15,15,15, 15,15,15,7, 7,7,7,15, 15,7,15,15
                byte    15,15,15,15, 7,7,15,16, 17,18,18,17, 7,38,15,19
                byte    20,21,22,23, 24,25,25,5, 26,27,28,29, 15,15,15,15
                byte    30,30,30,30, 30,30,30,7, 7,7,7,7, 7,7,7,7

                byte    30,30,30,30, 7,7,31,32, 7,7,7,7, 7,7,7,7
                byte    7,7,7,7, 7,7,7,7, 7,7,7,7, 7,7,7,7
                byte    7,7,7,7, 7,7,7,7, 7,7,7,7, 7,7,7,7
                byte    33,7,34,7, 7,35,36,7, 7,7,7,7, 7,7,7,37

                align   2

DBGOperFmtT:
                dc              DBGDispTstregs,DBGDispCmpregs,DBGDispBrDisp,DBGDispCmpimm,DBGDispRxRxRx,DBGDispRxRx,DBGDispPxPxPx,DBGDispNone
                dc              DBGDispPxRxImm,DBGDispRxImm,DBGDispNone,DBGDispNone,DBGDispNone,DBGDispRxImm,DBGDispNone,DBGDispNone
                dc              DBGDispNone,DBGDispNone,DBGDispNone,DBGDispNone,DBGDispNone,DBGDispNone,DBGDispNone,DBGDispNone
                dc              DBGDispNone,DBGDispNone,DBGDispNone,DBGDispSprRx,DBGDispNone,DBGDispNone,DBGDispNone,DBGDispNone
                dc              DBGDispNone,DBGDispNone,DBGDispNone,DBGDispNone,DBGDispNone,DBGDispNone,DBGDispNone,DBGDispNone

                ; Table of instruction mnemonic string addresses
                ; If the most signficant 12 bits are $FFF then a second table is referred to.
                ;
                align   2
DBGInsnMne:
                dc              mne_tst,mne_tst,mne_tst,mne_tst,mne_tst,mne_tst,mne_tst,mne_tst,mne_tst,mne_tst,mne_tst,mne_tst,mne_tst,mne_tst,mne_tst,mne_tst
                dc              mne_cmp,mne_cmp,mne_cmp,mne_cmp,mne_cmp,mne_cmp,mne_cmp,mne_cmp,mne_cmp,mne_cmp,mne_cmp,mne_cmp,mne_cmp,mne_cmp,mne_cmp,mne_cmp
                dc              mne_cmpi,mne_cmpi,mne_cmpi,mne_cmpi,mne_cmpi,mne_cmpi,mne_cmpi,mne_cmpi,mne_cmpi,mne_cmpi,mne_cmpi,mne_cmpi,mne_cmpi,mne_cmpi,mne_cmpi,mne_cmpi
                dc              mne_br,mne_br,mne_br,mne_br,mne_br,mne_br,mne_br,mne_br,mne_br,mne_br,mne_br,mne_br,mne_br,mne_br,mne_br,mne_br
                dc              $FFF0,$FFF1,$FFF2,mne_q,mne_q,mne_q,mne_biti,mne_addui,mne_addi,mne_subi,mne_muli,mne_divi,mne_addui,mne_subui,mne_mului,mne_divui
                dc              $FFF3,mne_mlo,mne_q,mne_andi,mne_ori,mne_eori,mne_q,mne_q,$FFF4,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q
                dc              mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_2addui,mne_4addui,mne_8addui,mne_16addui,mne_ldi
                dc              mne_q,mne_q,mne_mux,mne_q,mne_q,mne_q,mne_q,$FFF5,$FFF6,$FFF7,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q
                dc              mne_lb,mne_lbu,mne_lc,mne_lcu,mne_lh,mne_lhu,mne_lw,mne_q,mne_q,mne_q,mne_q,mne_lvwar,mne_swcr,mne_q,mne_lws,mne_lcl
                dc              mne_sb,mne_sc,mne_sh,mne_sw,mne_q,mne_q,mne_sti,mne_cas,mne_stset,mne_stmov,mne_stcmp,mne_stfnd,mne_q,mne_ldis,mne_sws,mne_cache
                dc              mne_jsr,mne_jsr,mne_jsr,mne_rts,mne_loop,mne_sys,mne_int,$FFF8,mne_mfspr,mne_mtspr,$FFF9,mne_movs,mne_lvb,mne_lvc,mne_lvh,mne_lvw
                dc              mne_lb,mne_lbu,mne_lc,mne_lcu,mne_lh,mne_lhu,mne_lw,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q
                dc              mne_sbx,mne_scx,mne_sh,mne_sw,mne_q,mne_q,mne_sti,mne_inc,mne_push,mne_pea,mne_pop,mne_link,mne_unlink,mne_q,mne_q,mne_q
                dc              mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q
                dc              mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q
                dc              $FFFA,mne_nop,mne_rts,mne_rte,mne_rti,$FFFB,mne_stp,mne_sync,mne_memsb,mne_memdb,mne_cli,mne_sei,mne_rtd,mne_q,mne_q,mne_imm
DBGInsnMne0:
                dc              mne_add,mne_sub,mne_mul,mne_div,mne_addu,mne_subu,mne_mulu,mne_divu,mne_2addu,mne_4addu,mne_8addu,mne_16addu,mne_q,mne_q,mne_q,mne_q
                dc              mne_min,mne_max,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q
                dc              mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q
                dc              mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q
DBGInsnMne1:
                dc              mne_cpuid,mne_redor,mne_redand,mne_par,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q
DBGInsnMne2:
                dc              mne_pand,mne_por,mne_peor,mne_pnand,mne_pnor,mne_penor,mne_pandc,mne_porc,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q
                dc              mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q
                dc              mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q
                dc              mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q
DBGInsnMne3:
                dc              mne_and,mne_or,mne_eor,mne_nand,mne_nor,mne_enor,mne_andc,mne_orc,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q
                dc              mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q
                dc              mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q
                dc              mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q
DBGInsnMne4:
                dc              mne_shl,mne_shr,mne_shlu,mne_shru,mne_rol,mne_ror,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q
                dc              mne_shli,mne_shri,mne_shlui,mne_shrui,mne_roli,mne_rori,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q
                dc              mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q
                dc              mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q
DBGInsnMne5:
                dc              mne_fmov,mne_q,mne_ftoi,mne_itof,mne_fneg,mne_fabs,mne_fsign,mne_fman,mne_fnabs,mne_q,mne_q,mne_q,mne_fstat,mne_frm,mne_q,mne_q
DBGInsnMne6:
                dc              mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_fcmp,mne_fadd,mne_fsub,mne_fmul,mne_fdiv,mne_q,mne_q,mne_q,mne_q
                dc              mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_fcmp,mne_fadd,mne_fsub,mne_fmul,mne_fdiv,mne_q,mne_q,mne_q,mne_q
                dc              mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q
                dc              mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q
DBGInsnMne7:
DBGInsnMne8:
                dc              mne_mov,mne_neg,mne_not,mne_abs,mne_sign,mne_cntlz,mne_cntlo,mne_cntpop,mne_sxb,mne_sxc,mne_sxh,mne_com,mne_zxb,mne_zxc,mne_zxh,mne_q
DBGInsnMne9:
                dc              mne_bfins,mne_bfset,mne_bfclr,mne_bfchg,mne_bfextu,mne_bfext,mne_bfinsi,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q
DBGInsnMneA:
                dc              mne_q,mne_q,mne_tlbrdreg,mne_tlbwrreg,mne_tlbwi,mne_tlben,mne_tlbdis,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q
DBGInsnMneB:
                dc              mne_bcdadd,mne_bcdsub,mne_bcdmul,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q,mne_q
DBGInsnMneT:
                dc              DBGInsnMne0,DBGInsnMne1,DBGInsnMne2,DBGInsnMne3,DBGInsnMne4,DBGInsnMne5,DBGInsnMne6,DBGInsnMne7,DBGInsnMne8,DBGInsnMne9,DBGInsnMneA,DBGInsnMneB

; Table of predicate conditions
;
DBGPredCons:
                byte    "f  ","f  ","eq ","ne ","le ","gt ","lt ","ge ","leu","gtu","ltu","geu","   ","   ","   ","   "

; Special purpose register names
;
DBGSpr:
                byte    "p0 ","p1 ","p2 ","p3 ","p4 ","p5 ","p6 ","p7 ","p8 ","p9 ","p10","p11","p12","p13","p14","p15"
                byte    "c0 ","c1 ","c2 ","c3 ","c4 ","c5 ","c6 ","c7 ","c8 ","c9 ","c10","c11","c12","c13","c14","c15"
                byte    "zs ","ds ","es ","fs ","gs ","hs ","ss ","cs ","zsl","dsl","esl","fsl","gsl","hsl","ssl","csl"
                byte    "pra","   ","tck","lc ","   ","   ","asd","sr ","   ","   ","   ","   ","   ","   ","   ","   "

; Table of mnemonics
;
mne_16addu:     byte    "16add",'u'|$80
mne_2addu:      byte    "2add",'u'|$80
mne_4addu:      byte    "4add",'u'|$80
mne_8addu:      byte    "8add",'u'|$80
mne_16addui:    byte    "16addu",'i'|$80
mne_2addui:     byte    "2addu",'i'|$80
mne_4addui:     byte    "4addu",'i'|$80
mne_8addui:     byte    "8addu",'i'|$80
mne_add:        byte    "ad",'d'|$80
mne_addi:       byte    "add",'i'|$80
mne_addu:       byte    "add",'u'|$80
mne_addui:      byte    "addu",'i'|$80
mne_and:        byte    "an",'d'|$80
mne_andi:       byte    "and",'i'$80
mne_bfchg:      byte    "bfch",'g'|$80
mne_bfclr:      byte    "bfcl",'r'|$80
mne_bfext:      byte    "bfex",'t'|$80
mne_bfextu:     byte    "bfext",'u'|$80
mne_bfins:      byte    "bfin",'s'|$80
mne_bfinsi:     byte    "bfins",'i'|$80
mne_bfset:      byte    "bfse",'t'|$80
mne_biti:       byte    "bit",'i'|$80
mne_br:         byte    "b",'r'|$80
mne_brk:        byte    "br",'k'|$80
mne_bsr:        byte    "bs",'r'|$80
mne_cmp:        byte    "cm",'p'|$80
mne_cmpi:       byte    "cmp",'i'|$80
mne_div:        byte    "di",'v'|$80
mne_divi:       byte    "div",'i'|$80
mne_divu:       byte    "div",'u'|$80
mne_divui:      byte    "divu",'i'|$80
mne_eor:        byte    "eo",'r'|$80
mne_eori:       byte    "eor",'i'|$80
mne_imm:        byte    "im",'m'|$80
mne_jsr         byte    "js",'r'|$80
mne_lb:         byte    "l",'b'|$80
mne_lbu:        byte    "lb",'u'|$80
mne_lc:         byte    "l",'c'|$80
mne_lcu:        byte    "lc",'u'|$80
mne_ldi:        byte    "ld",'i'|$80
mne_ldis:       byte    "ldi",'s'|$80
mne_lh:         byte    "l",'h'|$80
mne_lhu:        byte    "lh",'u'|$80
mne_loop:       byte    "loo",'p'|$80
mne_lvb:        byte    "lv",'b'|$80
mne_lvc:        byte    "lv",'c'|$80
mne_lvh:        byte    "lv",'h'|$80
mne_lvw:        byte    "lv",'w'|$80
mne_lw:         byte    "l",'w'|$80
mne_lws:        byte    "lw",'s'|$80
mne_mfspr:      byte    "mfsp",'r'|$80
mne_mtspr:      byte    "mtsp",'r'|$80
mne_mov:        byte    "mo",'v'|$80
mne_movs:       byte    "mov",'s'|$80
mne_mul:        byte    "mu",'l'|$80
mne_muli:       byte    "mul",'i'|$80
mne_mulu:       byte    "mul",'u'|$80
mne_mului:      byte    "mulu",'i'|$80
mne_nop:        byte    "no",'p'|$80
mne_or:         byte    "o",'r'|$80
mne_ori:        byte    "or",'i'|$80
mne_q:          byte    "??",'?'|$80
mne_rol:        byte    "ro",'l'|$80
mne_roli:       byte    "rol",'i'|$80
mne_ror:        byte    "ro",'r'|$80
mne_rori:       byte    "ror",'i'|$80
mne_rtd:        byte    "rt",'d'|$80
mne_rte:        byte    "rt",'e'|$80
mne_rti:        byte    "rt",'i'|$80
mne_rts:        byte    "rt",'s'|$80
mne_sb:         byte    "s",'b'|$80
mne_sc:         byte    "s",'c'|$80
mne_sh:         byte    "s",'h'|$80
mne_shl:        byte    "sh",'l'|$80
mne_shli:       byte    "shl",'i'|$80
mne_shr:        byte    "sh",'r'|$80
mne_shri:       byte    "shr",'i'|$80
mne_shru:       byte    "shr",'u'|$80
mne_shrui:      byte    "shru",'i'|$80
mne_stp:        byte    "st",'p'|$80
mne_sub:        byte    "su",'b'|$80
mne_subu:       byte    "sub",'u'|$80
mne_sw:         byte    "s",'w'|$80
mne_sync:       byte    "syn",'c'|$80
mne_sys:        byte    "sy",'s'|$80
mne_tlben:      byte    "tlbe",'n'|$80
mne_tlbdis:     byte    "tlbdi",'s'|$80
mne_tlbrdreg:   byte    "tlbrdre",'g'|$80
mne_tlbwi:      byte    "tlbw",'i'|$80
mne_tlbwrreg:   byte    "tlbwrre",'g'|$80
mne_tst:        byte    "ts",'t'|$80

msgDebugger:
        byte    "Thor Debugger (C) 2015 Robert Finch",0