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robfinch |
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; ============================================================================
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; __
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; \\__/ o\ (C) 2013, 2014 Robert Finch, Stratford
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; \ __ / All rights reserved.
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; \/_// robfinch@opencores.org
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; ||
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;
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;
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; This source file is free software: you can redistribute it and/or modify
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; it under the terms of the GNU Lesser General Public License as published
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; by the Free Software Foundation, either version 3 of the License, or
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; (at your option) any later version.
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;
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; This source file is distributed in the hope that it will be useful,
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; but WITHOUT ANY WARRANTY; without even the implied warranty of
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; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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; GNU General Public License for more details.
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;
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; You should have received a copy of the GNU General Public License
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; along with this program. If not, see .
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;
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; keyboard.asm
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; ============================================================================
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;
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DCMD_INITIALIZE EQU 0
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DCMD_MEDIA_CHK EQU 1
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DCMD_BUILD_BPB EQU 2
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DCMD_IOCTRL_READ EQU 3
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DCMD_READ EQU 4
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DCMD_PEEK EQU 5
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DCMD_INPUT_STATUS EQU 6
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DCMD_FLUSH_INPUT EQU 7
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DCMD_WRITE EQU 8
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DCMD_WRITE_VERIFY EQU 9
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DCMD_OUTPUT_STATUS EQU 10
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DCMD_FLUSH_OUTPUT EQU 11
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DCMD_IOCTRL_WRITE EQU 12
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DCMD_OPEN EQU 13
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DCMD_CLOSE EQU 14
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DCMD_IS_REMOVEABLE EQU 15
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DCMD_OUTPUT_UNTIL_BUSY EQU 16
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DCMD_IRQ EQU 0xFFFFFFFD
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DCMD_GETCHAR EQU 32
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DRSP_DONE EQU 1
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cpu RTF65002
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.code
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;------------------------------------------------------------------------------
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; The keyboard interrupt is selectively disabled and enabled to protect
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; the keyboard buffers structure. Other interrupts are still enabled.
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;------------------------------------------------------------------------------
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macro DisKeybd
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pha
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lda #15
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sta PIC+2
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pla
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endm
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macro EnKeybd
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pha
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lda #15
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sta PIC+3
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pla
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endm
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align 4
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; Device driver struct
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dw 0xFFFFFFFF ; link to next device
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dw 0x00008001 ; device attributes
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dw KeybdStrategy ; strategy routine
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dw KeybdIRQ ; interrupt routine
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dw KeybdCmdProc ; command processor
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align 4
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dw KeybdNop
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dw KeybdInit
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dw KeybdMediaChk
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dw KeybdBuildBPB
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dw KeybdGetChar ; GetChar()
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dw KeybdCheckForKey ; PeekChar()
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dw KeybdGetCharDirect ; unbuffered GetChar()
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dw KeybdCheckForKeyDirect ; unbuffered PeekChar()
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dw SendByteToKeybd ; KeybdPutChar
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dw SetKeyboardEcho
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dw KeybdSetpos ; set position
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;------------------------------------------------------------------------------
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;------------------------------------------------------------------------------
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public KeybdDCB:
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align 4
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db "KBD1 " ; name
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dw 4 ; number of chars in name
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dw 1 ; type
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dw 1 ; nBPB
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dw 0 ; last erc
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dw 0 ; nBlocks
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dw KeybdCmdProc
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dw KeybdInit
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dw KeybdStat
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dw 1 ; reentrancy count (1 to 255 are valid)
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dw 0 ; single user
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dw 0 ; hJob
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dw 0 ; OSD1
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dw 0 ; OSD2
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dw 0 ; OSD3
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dw 0 ; OSD4
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dw 0 ; OSD5
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dw 0 ; OSD6
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KeybdStrategy:
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rts
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KeybdCmdProc:
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rts
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KeybdStat:
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rts
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KeybdBuildBPB:
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rts
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KeybdSetpos:
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rts
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KeybdNop:
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lda #E_Ok
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rts
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;------------------------------------------------------------------------------
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; Setup keyboard
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;
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; Issues a 'reset keyboard' command to the keyboard, then selects scan code
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; set #2 (the most common one). Also sets up the keyboard buffer and
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; initializes the keyboard semaphore.
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;------------------------------------------------------------------------------
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;
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message "KeybdSetup"
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public KeybdSetup:
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lda #1 ; setup semaphore
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sta keybd_sema
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lda #32
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sta LEDS
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ldx #0
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; Set Keyboard IRQ vector
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tsr vbr,r2
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and r2,#-2
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lda #KeybdIRQ
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sta 448+15,x
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lda #15 ; enable kbd_irq
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sta PIC+3
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jsr KeybdInit
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lda #1 ; keyboard is device #1
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ldx #KeybdDCB ; pointer to DCB
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ldy #1 ; number of DCB's to setup
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ld r4,#1 ; Flag: is okay to replace existing device
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; jsr InitDevDrv
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stz keybdInIRQ
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inc keybdIsSetup ; set the setup flag
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rts
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KeybdInit:
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lda #33
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sta LEDS
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lda #$ff ; issue keyboard reset
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jsr SendByteToKeybd
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lda #38
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sta LEDS
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lda #4
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; jsr Sleep
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lda #1000000 ; delay a bit
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kbdi5:
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dea
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sta LEDS
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bne kbdi5
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lda #34
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sta LEDS
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lda #0xf0 ; send scan code select
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jsr SendByteToKeybd
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lda #35
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sta LEDS
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ldx #0xFA
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jsr WaitForKeybdAck
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cmp #$FA
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bne kbdi2
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lda #36
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sta LEDS
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lda #2 ; select scan code set#2
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jsr SendByteToKeybd
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lda #39
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sta LEDS
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kbdi2:
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rts
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msgBadKeybd:
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db "Keyboard not responding.",0
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SendByteToKeybd:
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phx
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ldx IOFocusNdx
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sta KEYBD
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lda #40
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sta LEDS
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tsr TICK,r3
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kbdi4: ; wait for transmit complete
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tsr TICK,r4
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sub r4,r4,r3
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cmp r4,#1000000
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bhi kbdbad
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lda #41
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sta LEDS
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lda KEYBD+3
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bit #64
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beq kbdi4
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bra sbtk1
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kbdbad:
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lda #42
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sta LEDS
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lda JCB_KeybdBad,x
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bne sbtk2
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lda #1
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sta JCB_KeybdBad,x
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lda #43
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sta LEDS
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lda #msgBadKeybd
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jsr DisplayStringCRLFB
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sbtk1:
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lda #44
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sta LEDS
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plx
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rts
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sbtk2:
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bra sbtk1
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; Wait for keyboard to respond with an ACK (FA)
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;
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WaitForKeybdAck:
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lda #64
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sta LEDS
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tsr TICK,r3
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wkbdack1:
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tsr TICK,r4
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sub r4,r4,r3
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cmp r4,#1000000
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bhi wkbdbad
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lda #65
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sta LEDS
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lda KEYBD
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bit #$8000
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beq wkbdack1
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; lda KEYBD+8
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and #$ff
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wkbdbad:
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rts
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; Wait for keyboard to respond with an ACK (FA)
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; This routine picks up the ack status left by the
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; keyboard IRQ routine.
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; r2 = 0xFA (could also be 0xEE for echo command)
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;
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WaitForKeybdAck2:
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phy
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ldy IOFocusNdx
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WaitForKeybdAck2a:
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lda JCB_KeybdAck,y
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cmp r1,r2
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bne WaitForKeybdAck2a
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stz JCB_KeybdAck,y
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ply
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rts
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;------------------------------------------------------------------------------
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; Code in the works.
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;------------------------------------------------------------------------------
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;
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comment ~
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public KeybdService:
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lda #keybd_mbx
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jsr AllocMbx
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jsr KeybdSetup
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kbds3:
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; Wait for a message to arrive at the service
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lda keybd_mbx
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ldx #-1 ; wait forever
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jsr WaitMsg
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cpx #DCMD_IRQ
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beq kbds1
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cpx #DCMD_GETCHAR
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beq kbds2
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cpx #DCMD_INITIALIZE
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beq kbds4
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bra kbds3
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kbds1:
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tyx ; D2 holds character
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jsr IKeybdIRQ
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bra kbds3
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kbds2:
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; The mailbox number is the same as the TCB number
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tya
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jsr IKeybdGetChar
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; Send a message back to the requester containing the key value.
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tax
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tya
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ldy #0
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jsr SendMsg
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bra kbds3
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kbds4:
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jsr KeybdInit
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bra kbds3
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~
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comment ~
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| 314 |
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public XKeybdIRQ:
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| 315 |
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pha
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| 316 |
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phx
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| 317 |
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phy
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| 318 |
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lda keybd_mbx
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ldx #DCMD_IRQ
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ldy KEYBD ; get keyboard character
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ld r0,KEYBD+1 ; clear keyboard strobe (turns off the IRQ)
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cli
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| 323 |
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jsr PostMsg
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| 324 |
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ply
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| 325 |
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plx
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| 326 |
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pla
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| 327 |
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rti
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| 328 |
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~
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| 329 |
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;------------------------------------------------------------------------------
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| 330 |
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; KeybdIRQ
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| 331 |
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;
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| 332 |
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; Normal keyboard interrupt, the lowest priority interrupt in the system.
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| 333 |
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; Grab the character from the keyboard device and store it in a buffer.
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| 334 |
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; The buffer of the task with the input focus is updated.
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| 335 |
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; This IRQ has to check for the ALT-tab character and take care of
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| 336 |
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; switching the IO focus if detected. It can't be done in the KeybdGetChar
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| 337 |
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; because the app with the IO focus may not call that routine. We know for
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| 338 |
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; sure the interrupt routine will be called when a key is pressed. The
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| 339 |
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; mechanism used is to set a flag indicating a focus switch is required.
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| 340 |
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; The actual focus switch occurs when a selected to run. The reason the
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| 341 |
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; focus switch doesn't occur during the interrupt routine is that it takes
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| 342 |
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; a large number of clock cycles (the screen buffer is transferred).
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| 343 |
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;------------------------------------------------------------------------------
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| 344 |
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;
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| 345 |
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message "KeybdIRQ"
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| 346 |
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| 347 |
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public IKeybdIRQ:
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| 348 |
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public KeybdIRQ:
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| 349 |
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inc keybdInIRQ
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| 350 |
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cld
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| 351 |
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pha
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| 352 |
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phx
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| 353 |
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phy
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| 354 |
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push r4
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| 355 |
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| 356 |
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lda #15 ; disable further keyboard interrupts
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| 357 |
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sta PIC+2
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| 358 |
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ldx KEYBD ; get keyboard character
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| 359 |
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ld r0,KEYBD+1 ; clear keyboard strobe (turns off the IRQ)
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| 360 |
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txy ;
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| 361 |
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cli ; global interrupt enable
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| 362 |
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bit r3,#$800 ; test bit #11
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| 363 |
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bne KeybdIRQc ; ignore keyup messages for now
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| 364 |
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ld r4,IOFocusNdx ; get the job with the input focus
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| 365 |
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bit r3,#$200 ; check for ALT-tab
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| 366 |
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beq KeybdIrq3
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| 367 |
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and r3,r3,#$FF
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| 368 |
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cmp r3,#TAB ; if we find an ALT-tab
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| 369 |
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bne KeybdIrq3
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| 370 |
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inc iof_switch
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| 371 |
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; jsr SwitchIOFocus
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| 372 |
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bra KeybdIRQc ; don't store off the ALT-tab character
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| 373 |
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KeybdIrq3:
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| 374 |
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and r3,r3,#$ff
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| 375 |
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cmp r3,#$FA
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| 376 |
|
|
bne KeybdIrq1
|
| 377 |
|
|
sty JCB_KeybdAck,r4
|
| 378 |
|
|
bra KeybdIRQc
|
| 379 |
|
|
; strip out non-key keyboard responses
|
| 380 |
|
|
KeybdIrq1:
|
| 381 |
|
|
cmp r3,#$AA ; self test pass
|
| 382 |
|
|
beq KeybdIRQd
|
| 383 |
|
|
cmp r3,#$EE ; echo response
|
| 384 |
|
|
beq KeybdIRQd
|
| 385 |
|
|
cmp r3,#$00 ; keyboard error
|
| 386 |
|
|
beq KeybdIRQd
|
| 387 |
|
|
cmp r3,#$FF ; keyboard error
|
| 388 |
|
|
beq KeybdIRQd
|
| 389 |
|
|
bit r2,#$800 ; test bit #11
|
| 390 |
|
|
bne KeybdIRQc ; ignore keyup messages for now
|
| 391 |
|
|
KeybdIrq2:
|
| 392 |
|
|
lda JCB_KeybdHead,r4
|
| 393 |
|
|
ina ; increment head pointer
|
| 394 |
|
|
and #$f ; limit
|
| 395 |
|
|
ldy JCB_KeybdTail,r4 ; check for room in the keyboard buffer
|
| 396 |
|
|
cmp r1,r3
|
| 397 |
|
|
beq KeybdIRQc ; if no room, the newest char will be lost
|
| 398 |
|
|
sta JCB_KeybdHead,r4
|
| 399 |
|
|
dea
|
| 400 |
|
|
and #$f
|
| 401 |
|
|
stx JCB_KeybdLocks,r4
|
| 402 |
|
|
stx keybdLock ; global keyboard lock status
|
| 403 |
|
|
add r1,r1,r4
|
| 404 |
|
|
stx JCB_KeybdBuffer,r1 ; store character in buffer
|
| 405 |
|
|
KeybdIRQc:
|
| 406 |
|
|
|
| 407 |
|
|
; support EhBASIC's IRQ functionality
|
| 408 |
|
|
; code derived from minimon.asm
|
| 409 |
|
|
lda #15 ; Keyboard is IRQ #15
|
| 410 |
|
|
sta IrqSource
|
| 411 |
|
|
lb r1,IrqBase ; get the IRQ flag byte
|
| 412 |
|
|
lsr r2,r1
|
| 413 |
|
|
or r1,r1,r2
|
| 414 |
|
|
and #$E0
|
| 415 |
|
|
sb r1,IrqBase ; save the new IRQ flag byte
|
| 416 |
|
|
KeybdIRQd:
|
| 417 |
|
|
lda #15 ; re-enable keyboard interrupts
|
| 418 |
|
|
sta PIC+3
|
| 419 |
|
|
pop r4
|
| 420 |
|
|
ply
|
| 421 |
|
|
plx
|
| 422 |
|
|
pla
|
| 423 |
|
|
dec keybdInIRQ
|
| 424 |
|
|
rti
|
| 425 |
|
|
|
| 426 |
|
|
|
| 427 |
|
|
public KeybdRstIRQ:
|
| 428 |
|
|
jmp start
|
| 429 |
|
|
|
| 430 |
|
|
;-----------------------------------------------------------------------------
|
| 431 |
|
|
; Media Check
|
| 432 |
|
|
; A value of 1 is returned indicating that the media hasn't changed.
|
| 433 |
|
|
;-----------------------------------------------------------------------------
|
| 434 |
|
|
;
|
| 435 |
|
|
KeybdMediaChk:
|
| 436 |
|
|
lda #1
|
| 437 |
|
|
rts
|
| 438 |
|
|
|
| 439 |
|
|
;-----------------------------------------------------------------------------
|
| 440 |
|
|
; r1 0=echo off, non-zero = echo on
|
| 441 |
|
|
;------------------------------------------------------------------------------
|
| 442 |
|
|
public SetKeyboardEcho:
|
| 443 |
|
|
pha
|
| 444 |
|
|
phx
|
| 445 |
|
|
tax
|
| 446 |
|
|
jsr GetPtrCurrentJCB
|
| 447 |
|
|
stx JCB_KeybdEcho,r1
|
| 448 |
|
|
plx
|
| 449 |
|
|
pla
|
| 450 |
|
|
rts
|
| 451 |
|
|
|
| 452 |
|
|
;------------------------------------------------------------------------------
|
| 453 |
|
|
; Get character from keyboard buffer
|
| 454 |
|
|
; return character in acc or -1 if no
|
| 455 |
|
|
; characters available.
|
| 456 |
|
|
;------------------------------------------------------------------------------
|
| 457 |
|
|
;
|
| 458 |
|
|
message "KeybdGetChar"
|
| 459 |
|
|
|
| 460 |
|
|
comment ~
|
| 461 |
|
|
public KeybdGetChar:
|
| 462 |
|
|
phx
|
| 463 |
|
|
phy
|
| 464 |
|
|
push r4
|
| 465 |
|
|
; Send a message to the keyboard service requesting a character.
|
| 466 |
|
|
lda keybd_mbx ;
|
| 467 |
|
|
ldx #DCMD_GETCHAR ; opcode
|
| 468 |
|
|
ldy RunningTCB ; response mailbox number
|
| 469 |
|
|
jsr SendMsg
|
| 470 |
|
|
; Wait for a response message from the keyboard service.
|
| 471 |
|
|
tya
|
| 472 |
|
|
ldx #-1
|
| 473 |
|
|
jsr WaitMsg
|
| 474 |
|
|
txa
|
| 475 |
|
|
pop r4
|
| 476 |
|
|
ply
|
| 477 |
|
|
plx
|
| 478 |
|
|
rts
|
| 479 |
|
|
~
|
| 480 |
|
|
;------------------------------------------------------------------------------
|
| 481 |
|
|
; KeybdGetChar
|
| 482 |
|
|
;
|
| 483 |
|
|
; Get keyboard character from buffer for the current job.
|
| 484 |
|
|
;
|
| 485 |
|
|
; Registers Affected: r1, flags
|
| 486 |
|
|
; Parameters: none
|
| 487 |
|
|
; Returns:
|
| 488 |
|
|
; r1 = keyboard character or -1 if no character is available.
|
| 489 |
|
|
;------------------------------------------------------------------------------
|
| 490 |
|
|
;
|
| 491 |
|
|
public KeybdGetChar:
|
| 492 |
|
|
jsr GetCurrentJob
|
| 493 |
|
|
|
| 494 |
|
|
;------------------------------------------------------------------------------
|
| 495 |
|
|
; Get keyboard character from buffer for the specified job. This entry point
|
| 496 |
|
|
; is meant to be called by the keyboard service.
|
| 497 |
|
|
;
|
| 498 |
|
|
; Registers Affected: r1, flags
|
| 499 |
|
|
; Parameters:
|
| 500 |
|
|
; r1 = job number
|
| 501 |
|
|
; Returns:
|
| 502 |
|
|
; r1 = keyboard character or -1 if no character is available.
|
| 503 |
|
|
;------------------------------------------------------------------------------
|
| 504 |
|
|
;
|
| 505 |
|
|
IKeybdGetChar:
|
| 506 |
|
|
phx
|
| 507 |
|
|
phy
|
| 508 |
|
|
ld r0,keybdIsSetup ; the system might call GetChar before the keyboard
|
| 509 |
|
|
beq .nochar ; is setup.
|
| 510 |
|
|
tay
|
| 511 |
|
|
cmp r3,#NR_JCB
|
| 512 |
|
|
bhs .nochar
|
| 513 |
|
|
mul r3,r3,#JCB_Size ; convert handle to pointer
|
| 514 |
|
|
add r3,r3,#JCBs
|
| 515 |
|
|
lda #15 ; disable keyboard interrupt
|
| 516 |
|
|
sta PIC+2
|
| 517 |
|
|
ld r0,keybdInIRQ
|
| 518 |
|
|
bne .nochari
|
| 519 |
|
|
ldx JCB_KeybdTail,y ; if keybdTail==keybdHead then there are no
|
| 520 |
|
|
lda JCB_KeybdHead,y ; characters in the keyboard buffer
|
| 521 |
|
|
cmp r1,r2
|
| 522 |
|
|
beq .nochari
|
| 523 |
|
|
phx
|
| 524 |
|
|
add r2,r2,r3
|
| 525 |
|
|
lda JCB_KeybdBuffer,x
|
| 526 |
|
|
plx
|
| 527 |
|
|
and r1,r1,#$ff ; mask off control bits
|
| 528 |
|
|
inx ; increment index
|
| 529 |
|
|
and r2,r2,#$0f
|
| 530 |
|
|
stx JCB_KeybdTail,y
|
| 531 |
|
|
ldx JCB_KeybdEcho,y
|
| 532 |
|
|
php
|
| 533 |
|
|
ldx #15 ; re-enable keyboard interrupt
|
| 534 |
|
|
stx PIC+3
|
| 535 |
|
|
plp
|
| 536 |
|
|
beq .xit ; status from the ldx
|
| 537 |
|
|
cmp #CR
|
| 538 |
|
|
bne .dispchar
|
| 539 |
|
|
jsr CRLF ; convert CR keystroke into CRLF
|
| 540 |
|
|
bra .xit
|
| 541 |
|
|
.dispchar:
|
| 542 |
|
|
jsr DisplayChar
|
| 543 |
|
|
bra .xit
|
| 544 |
|
|
.nochari
|
| 545 |
|
|
lda #15 ; re-enable keyboard interrupt
|
| 546 |
|
|
sta PIC+3
|
| 547 |
|
|
.nochar:
|
| 548 |
|
|
lda #-1
|
| 549 |
|
|
.xit:
|
| 550 |
|
|
ply
|
| 551 |
|
|
plx
|
| 552 |
|
|
rts
|
| 553 |
|
|
|
| 554 |
|
|
;------------------------------------------------------------------------------
|
| 555 |
|
|
; Check if there is a keyboard character available in the keyboard buffer.
|
| 556 |
|
|
;
|
| 557 |
|
|
; Returns
|
| 558 |
|
|
; r1 = n, Z=0 if there is a key available, otherwise
|
| 559 |
|
|
; r1 = 0, Z=1 if there is not a key available
|
| 560 |
|
|
;------------------------------------------------------------------------------
|
| 561 |
|
|
;
|
| 562 |
|
|
message "KeybdCheckForKey"
|
| 563 |
|
|
public KeybdCheckForKey:
|
| 564 |
|
|
phx
|
| 565 |
|
|
phy
|
| 566 |
|
|
ldx #0
|
| 567 |
|
|
ld r0,keybdIsSetup
|
| 568 |
|
|
beq .nochar2
|
| 569 |
|
|
jsr GetPtrCurrentJCB
|
| 570 |
|
|
tay
|
| 571 |
|
|
lda #15 ; disable keyboard interrupt
|
| 572 |
|
|
sta PIC+2
|
| 573 |
|
|
ld r0,keybdInIRQ
|
| 574 |
|
|
bne .nochar
|
| 575 |
|
|
ldx JCB_KeybdTail,y
|
| 576 |
|
|
sub r2,r2,JCB_KeybdHead,y
|
| 577 |
|
|
.nochar
|
| 578 |
|
|
lda #15 ; re-enable keyboard interrupt
|
| 579 |
|
|
sta PIC+3
|
| 580 |
|
|
.nochar2
|
| 581 |
|
|
txa
|
| 582 |
|
|
ply
|
| 583 |
|
|
plx
|
| 584 |
|
|
cmp #0
|
| 585 |
|
|
rts
|
| 586 |
|
|
|
| 587 |
|
|
;------------------------------------------------------------------------------
|
| 588 |
|
|
; Tests the keyboard port directly.
|
| 589 |
|
|
; Check if there is a keyboard character available. If so return true (1)
|
| 590 |
|
|
; otherwise return false (0) in r1.
|
| 591 |
|
|
;------------------------------------------------------------------------------
|
| 592 |
|
|
;
|
| 593 |
|
|
message "KeybdCheckForKeyDirect"
|
| 594 |
|
|
public KeybdCheckForKeyDirect:
|
| 595 |
|
|
lda KEYBD
|
| 596 |
|
|
and #$8000
|
| 597 |
|
|
beq kcfkd1
|
| 598 |
|
|
lda #1
|
| 599 |
|
|
kcfkd1
|
| 600 |
|
|
rts
|
| 601 |
|
|
|
| 602 |
|
|
;------------------------------------------------------------------------------
|
| 603 |
|
|
; Get character directly from keyboard. This routine blocks until a key is
|
| 604 |
|
|
; available.
|
| 605 |
|
|
;------------------------------------------------------------------------------
|
| 606 |
|
|
;
|
| 607 |
|
|
public KeybdGetCharDirect:
|
| 608 |
|
|
phx
|
| 609 |
|
|
kgc1:
|
| 610 |
|
|
lda KEYBD
|
| 611 |
|
|
bit #$8000
|
| 612 |
|
|
beq kgc1
|
| 613 |
|
|
ld r0,KEYBD+1 ; clear keyboard strobe
|
| 614 |
|
|
bit #$800 ; is it a keydown event ?
|
| 615 |
|
|
bne kgc1
|
| 616 |
|
|
; bit #$200 ; check for ALT-tab
|
| 617 |
|
|
; bne kgc2
|
| 618 |
|
|
; and r2,r1,#$7f
|
| 619 |
|
|
; cmp r2,#TAB ; if we find an ALT-tab
|
| 620 |
|
|
; bne kgc2
|
| 621 |
|
|
; jsr SwitchIOFocus
|
| 622 |
|
|
; bra kgc1
|
| 623 |
|
|
;kgc2:
|
| 624 |
|
|
and #$ff ; remove strobe bit
|
| 625 |
|
|
ldx KeybdEcho ; is keyboard echo on ?
|
| 626 |
|
|
beq gk1
|
| 627 |
|
|
cmp #CR
|
| 628 |
|
|
bne gk2 ; convert CR keystroke into CRLF
|
| 629 |
|
|
jsr CRLF
|
| 630 |
|
|
bra gk1
|
| 631 |
|
|
gk2:
|
| 632 |
|
|
jsr DisplayChar
|
| 633 |
|
|
gk1:
|
| 634 |
|
|
plx
|
| 635 |
|
|
rts
|
| 636 |
|
|
|
| 637 |
|
|
|
| 638 |
|
|
;------------------------------------------------------------------------------
|
| 639 |
|
|
; Keyboard LEDs task
|
| 640 |
|
|
; This small task tracks the keyboard lock status keys and updates the
|
| 641 |
|
|
; keyboard LEDs accordingly. This task runs every 100ms.
|
| 642 |
|
|
;------------------------------------------------------------------------------
|
| 643 |
|
|
;
|
| 644 |
|
|
public KeybdStatusLEDs:
|
| 645 |
|
|
ksl4:
|
| 646 |
|
|
lda #15 ; disable keyboard interrupt
|
| 647 |
|
|
sta PIC+2
|
| 648 |
|
|
ld r0,keybdInIRQ
|
| 649 |
|
|
bne ksl5
|
| 650 |
|
|
lda #$ED
|
| 651 |
|
|
jsr SendByteToKeybd
|
| 652 |
|
|
jsr WaitForKeybdAck ; wait for a feedback char
|
| 653 |
|
|
cmp #$FA ; was it an acknowledge (should be)
|
| 654 |
|
|
beq ksl7
|
| 655 |
|
|
lda #15 ; if not, re-enable keyboard, wait till next time
|
| 656 |
|
|
sta PIC+3
|
| 657 |
|
|
bra ksl5
|
| 658 |
|
|
ksl7:
|
| 659 |
|
|
lda #0
|
| 660 |
|
|
ldx keybdLock
|
| 661 |
|
|
bit r2,#4000 ; bit 14 = scroll lock status
|
| 662 |
|
|
beq ksl1
|
| 663 |
|
|
lda #1
|
| 664 |
|
|
ksl1:
|
| 665 |
|
|
bit r2,#1000 ; bit 12 = numlock status
|
| 666 |
|
|
beq ksl2
|
| 667 |
|
|
or r1,#2
|
| 668 |
|
|
ksl2:
|
| 669 |
|
|
bit r2,#2000 ; bit 13 = capslock status
|
| 670 |
|
|
beq ksl3
|
| 671 |
|
|
or r1,#4
|
| 672 |
|
|
ksl3:
|
| 673 |
|
|
jsr SendByteToKeybd
|
| 674 |
|
|
lda #15 ; re-enabled keyboard interrupt
|
| 675 |
|
|
sta PIC+3
|
| 676 |
|
|
ksl5:
|
| 677 |
|
|
lda #10
|
| 678 |
|
|
jsr Sleep
|
| 679 |
|
|
bra ksl4
|
