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*
** FLEX 9 COMPACT FLASH FORMAT PROGRAM
*
* FOR B5-X300 and CF with 8 Bit Transfer interface
*
*
CFLAG   EQU $01     CARRY FLAG
VFLAG   EQU $02     OVERFLOW FLAG
ZFLAG   EQU $04     ZERO FLAG
NFLAG   EQU $08     NEGATIVE FLAG
IFLAG   EQU $10     IRQ MASK CC
HFLAG   EQU $20     HALF CARRY
FFLAG   EQU $40     FIRQ MASK CC
EFLAG   EQU $80     ENTIRE FLAG
*
MAPPAG  EQU $00     PAGE $0000 DAT ADDRESS
*
* Serial Port
*
ACIAS   EQU $E000
ACIAC1  EQU ACIAS
ACIAD1  EQU ACIAS+1
DELCON  EQU 1250    Delay (Processor clock in MHz * 50)
*
* XMODEM Control characters
*
SOH     EQU $01
EOT     EQU $04
ACK     EQU $06
NAK     EQU $15
CAN     EQU $18
*
* Some dummy Constants
*
RMAXTRK EQU 64
RMAXSEC EQU 255
RTOTSEC EQU RMAXTRK*RMAXSEC-RMAXSEC
*
* Start
*
        ORG $0100
START   LBSR  UFSUB
        JMP  [$F800]  Jump to monitor on Completion.
*
*
* RAM SPACE
*
DRVNUM  FCB  0
TRACK   FCB  0
SECTOR  FCB  0
CHKSUM  FCB  0
BLKNUM  FCB  0 Xmodem block number
BYTCNT  FCB  0 Xmodem byte count
XSTATE  FDB  0 Xmodem State Vector
DELCNT  FCB  $00,$00,$00 Xmodem Poll timer
MAXTRK  FCB  0
MAXSEC  FCB  0
        ORG  $0200
*
* SECTOR BUFFER
*
BUFFER  RMB  256
*
*
* recieve char from remote drive.
* timeout if no response for approx 1s.
* Entry: no parameters
* Exit:  (A) = recieved char, (C)=1 if valid char, (C)=0 if timeout.
*
RCHAR   PSHS    X,Y
*
        LDX     #1000         1000x inner loop
RCHAR1  LDY     #DELCON       delay constant for inner loop (approx 1ms).
RCHAR2  LDA     ACIAC1        test for recieved char
        ASRA
        BCS     RCHAR3        get character
        LEAY    -1,Y          else, continue to count delay
        BNE     RCHAR2
        LEAX    -1,X
        BNE     RCHAR1
        PULS    X,Y,PC        return with error if timed out
*
RCHAR3  LDA     ACIAD1        return data (carry bit still set)
        PULS    X,Y,PC
*
*
* transmit char to remote drive.
* timeout if no response for approx 1s. (allows for use of hardware flow control)
* Entry: (A) = char to transmit
* Exit:  (A) = recieved char, (C)=1 if valid char, (C)=0 if timeout.
*
SCHAR   PSHS    X,Y
        PSHS    A
*
        LDX     #1000         1000x inner loop
SCHAR1  LDY     #DELCON       delay constant for inner loop (approx 1ms).
SCHAR2  LDA     ACIAC1        test for space in transmit FIFO
        ASRA
        ASRA
        BCS     SCHAR3        send character
        LEAY    -1,Y          else, continue to count delay
        BNE     SCHAR2
        LEAX    -1,X
        BNE     SCHAR1
        PULS    A
        PULS    X,Y,PC        return with error if timed out
*
SCHAR3  PULS    A
        STA     ACIAD1        send data (carry bit still set)
        PULS    X,Y,PC
*
* Print Data
*
PDATA0  BSR  SCHAR
PDATA1  LDA  ,X+
        CMPA #$04
        BNE  PDATA0
        RTS
*
** 'UF' Format RAMdisc to FLEX standard.
*
DISFOS  FCB $0A,$0D
        FCC 'Formating RAMdisk... '
        FCB $0A,$0D
        FCC 'Drive Number ?'
        FCB 4
MESS6   FCB $0A,$0D,4
        FCC 'Ramdisk not allocated! '
        FCB 4
UFMSG1  FCB $0A,$0D
        FCC 'Format Complete'
        FCB 4
*
UFSUB   JSR  INITDR
        LDX #DISFOS
        JSR PDATA1
UFSUB1  LBSR RCHAR
        BCC  UFSUB1
        LBSR SCHAR
        CMPA #'0'
        LBLO UFEXIT
        CMPA #'3'
        LBHI  UFEXIT
        SUBA #'0'
        TFR  A,B
        STB DRVNUM
        LDX #DRVNUM-3
        JSR DRVSEL
*
* set up free chain
*
        LDX #BUFFER clear out buffer
        CLRA
        CLRB
DFL1    STA 0,X+
        DECB
        BNE DFL1
*
        CLR TRACK
        LDA #1
        STA SECTOR
DFL2    LDX #BUFFER
        LDA TRACK
        STA 0,X
        LDA SECTOR
        INCA
        CMPA #RMAXSEC+1 last sector on track?
        BNE DFL3
        INC 0,X
        LDA #1
DFL3    STA 1,X
        LDA TRACK
        LDB SECTOR
        JSR WRITSC
        INC SECTOR
        LDA SECTOR
        CMPA #RMAXSEC+1
        BNE DFL2
        LDA #1
        STA  SECTOR
        INC TRACK
        LDA TRACK
        CMPA #RMAXTRK
        BNE DFL2
* break free chain at last track/sector
        LDX  #BUFFER
        LDA  #RMAXTRK-1
        LDB  #RMAXSEC
        JSR  READSC
        LDX  #BUFFER
        CLR  0,X
        CLR  1,X
        LDA  #RMAXTRK-1
        LDB  #RMAXSEC
        JSR  WRITSC
* set up sector structure, SIR, directory etc
        LDX  #BUFFER
        CLRA
        LDB  #RMAXSEC
        JSR  READSC
        LDX  #BUFFER
        CLR  0,X break end of directory chain
        CLR  1,X
        CLRA
        LDB  #RMAXSEC
        JSR  WRITSC
*
        LDX  #BUFFER
        CLRA
        LDB  #3 set up SIR
        JSR  READSC
        LDX  #BUFFER
        CLR  0,X break forward link
        CLR  1,X
        LDD  #$5241 set volume name (RAMDISK )
        STD  16,X
        LDD  #$4D44
        STD  18,X
        LDD  #$4953
        STD  20,X
        LDD  #$4B20
        STD  22,X
        LDD  #1 volume number
        STD  27,X
        LDD  #$0101 first trk/sec  01-01
        STD  29,X
        LDA  #RMAXTRK-1
        LDB  #RMAXSEC
        STD  31,X
        STD  38,X
        LDD  #RTOTSEC total DATA sectors (2912-14)
        STD  33,X
*
        LDA #01 month   set default creation date (SYS09's birthday!)
        STA 35,X
        LDA #07 day
        STA 36,X
        LDA #07 year
        STA 37,X
*
RF3     CLRA
        LDB  #3
        JSR  WRITSC
*
*        LDX #BUFFER
*        CLRA
*        LDB #1
*        JSR READSC
*        LDX #BUFFER
*        LDA #$AA set the init flag
*        STA 0,X
*        LDA  #$55
*        STA 1,X
*        CLRA
*        LDB #1
*        JSR WRITSC
*
*  Write Boot sector
*
        LDX  #$C000
        CLRA         TRACK 0
        LDB  #$01    SECTOR 1
        STA  TRACK
        STB  SECTOR
        LBSR WRITSC
*
UFEXIT  LDX #UFMSG1
        JMP PDATA1
*
*
** FLEX 9 COMPACT FLASH DISK DRIVERS
*
* FOR SYS09BUG 1.2 ON THE BURCHED B5-X300
* WITH I/O MAPPED AT $XE000
* AND ROM MAPPED AT $XF000
* THE BURCHED B5-X300 HAS 256KBYTES OF SRAM
* THE FIRST 64K IS USED BY FLEX,
* THE SECOND 192K MAY BE USED AS A RAM DISK
*
*
IMASK  EQU $10     IRQ MASK CC
FMASK  EQU $40     FIRQ MASK CC
DATREG EQU $FFF0   DAT REGISTERS
*
CF_BASE    EQU $E040
CF_DATA    EQU CF_BASE+0
CF_ERROR   EQU CF_BASE+1 ; read error
CF_FEATURE EQU CF_BASE+1 ; write feature
CF_SCNT    EQU CF_BASE+2
CF_SNUM    EQU CF_BASE+3
CF_CLO     EQU CF_BASE+4
CF_CHI     EQU CF_BASE+5
CF_HEAD    EQU CF_BASE+6
CF_STATUS  EQU CF_BASE+7 ; read status
CF_COMAND  EQU CF_BASE+7 ; write command
*
* Command Equates
*
CMDREAD    EQU $20 ; Read Single sector
CMDWRITE   EQU $30 ; Write Single sector
CMDFEATURE EQU $EF
FEAT8BIT   EQU $01 ; enable 8 bit transfers
HEADLBA    EQU $E0
*
* Status bit equates
*
BSY        EQU $80
DRDY       EQU $40
DRQ        EQU $08
ERR        EQU $01
*
*
* INITIALIZE CF CARD FOR 8 BIT LBA MODE
*
INITDR BSR WAITRDY
       LDA  #HEADLBA
       STA  CF_HEAD
       LDA #FEAT8BIT
       STA CF_FEATURE
       LDA #CMDFEATURE
       STA CF_COMAND
       BRA WAITRDY
*
* RESTORE DISK DRIVER (SEEK TRACK 00)
*
RESTR1 BSR   DRVSEL
       CLRA           ; Track 0
       LDB   #$01     ; Sector 1
*
* Seek track and sector
* A holds track number (0 - ??)
* B holds sector number (1 - ??)
* Sector numbers starts from 1
* subtract 1 to start from sector 0 on CF
*
SEEKTS DECB
       STB  CF_SNUM
       STA  CF_CLO
       LDB  DRVNUM
       STB  CF_CHI
       LDB  #$01
       STB  CF_SCNT
       CLRB
       RTS
*
* READ SECTORS FROM CF
*
*
READSC BSR  SEEKTS
       LDA  #CMDREAD ; IDE READ MULTIPLE
       STA  CF_COMAND
       BSR  WAITRDY
*
* READ LOOP
*
       CLRB
RDLP1  BSR  WAITDRQ
       LDA  CF_DATA
       STA  ,X+
       DECB
       BNE  RDLP1
*
       CLRB
RDLP2  BSR  WAITDRQ
       LDA  CF_DATA
       DECB
       BNE  RDLP2
*
       BSR  WAITRDY
       CLRB
       RTS
*
* WRITE SECTOR TO CF
*
WRITSC BSR  SEEKTS   ; SEEK TRACK & SECTOR
       LDA  #CMDWRITE ; IDE WRITE MULTIPLE
       STA  CF_COMAND
       BSR  WAITRDY
*
* WRITE LOOP
*
       CLRB
WRTLP1 BSR  WAITDRQ
       LDA  ,X+
       STA  CF_DATA
       DECB
       BNE  WRTLP1
*
       CLRB
WRTLP2 BSR  WAITDRQ
       CLRA
       STA  CF_DATA
       DECB
       BNE WRTLP2
*
       BSR  WAITRDY
       CLRB
       RTS
*
* CHECK FOR BUSY
* Doubles as VERIFY
*
BUSY   CLRB            Never busy
       RTS
*
* DRIVE SELECT DISK DRIVER
*
DRVSEL LDA   3,X       GET DRIVE # FROM FCB
       CMPA  #3
       BLS   DRVS2     IF > 3, SET IT TO 0
       CLRA
DRVS2  STA   DRVNUM
       CLRB            ; SET Z, CLEAR C
       RTS
*
* CHECK DRIVE READY DISK DRIVER
*
CHKDRV LDA  3,X
       CLRB             ; CLEAR C, SET Z
       RTS
*
* WAIT UNTIL READY
*
WAITRDY LDA  CF_STATUS
        BITA #BSY
        BNE  WAITRDY
        LDA  CF_STATUS
        BITA #DRDY
        BEQ  WAITRDY
        RTS
*
* WAIT FOR DATA REQUEST
*
WAITDRQ LDA  CF_STATUS
        BITA #DRQ
        BEQ  WAITDRQ
        RTS
*
*******************************************************
*
* Bootstrap FLEX Loader
*
* SBUG1.8 loads the bootstap loader at $C000
* however the Flex adaption manual has the
* bootstrap loader residing at $C100
*
******************************************************
*
* Equates
*
STACK   EQU $C0FF
SCTBUF  EQU $C300
*
* Start of Utility
*
        ORG $C000
BOOT    BRA LOAD0
        FCB 0,0,0
TRK     FCB 0        File start track
SCT     FCB 0        File start sector
DNS     FCB 0        Density Flag (not used)
TADR    FDB $C000    Transfer address
LADR    FDB 0        Load Address
DRNUM   FCB 0        Drive number 0
*
LOAD0   LDS  #STACK   Set up stack
        LDD  TRK      Set up start track and sector
        STD  SCTBUF
        LDY  #SCTBUF+256
*
* Perform actual file load
*
LOAD1   BSR GETCH    Get acharcater
        CMPA #$02    Data record hearder ?
        BEQ  LOAD2   Skip, is so
        CMPA #$16    Xfr address hearder ?
        BNE LOAD1    Loop if neither
*
* Get transfer address
*
        BSR  GETCH
        STA  TADR
        BSR  GETCH
        STA  TADR+1
        BRA  LOAD1
*
* Load data record
*
LOAD2  BSR  GETCH  Get load address
       STA  LADR
       BSR  GETCH
       STA  LADR+1
       BSR  GETCH  Get Bytes count
       TFR  A,B
       TSTB
       BEQ  LOAD1 Loop if count = 0
       LDX  LADR  Get load address
LOAD3  PSHS B,X
       BSR  GETCH  Get data character
       PULS B,X
       STA  ,X+    Store at load address
       DECB
       BNE  LOAD3  Loop until count = 0
       BRA  LOAD1
*
* Get Character routine
* Reads a sector if needed
*
GETCH  CMPY #SCTBUF+256 out of data ?
       BNE  GETCH4      Go read Character if not
GETCH2 LDX  #SCTBUF     Point to buffer
       LDD  0,X         Get forward Link
       BEQ  GO          if zero, file is loaded
       BSR  READ        Read next sector
       BNE  BOOT        start over if error
       LDY  #SCTBUF+4   Point past link
GETCH4 LDA  ,Y+         Else, get a character
       RTS
*
* File is loaded, Jump to it
*
GO     JMP  [TADR]      Jump to transfer address
 
*
** FLEX 9 COMPACT FLASH DISK DRIVERS
*
* FOR SYS09BUG 1.2 ON THE BURCHED B5-X300
* WITH I/O MAPPED AT $XE000
* AND ROM MAPPED AT $XF000
* THE BURCHED B5-X300 HAS 256KBYTES OF SRAM
* THE FIRST 64K IS USED BY FLEX,
* THE SECOND 192K MAY BE USED AS A RAM DISK
*
*
*IMASK  EQU $10     IRQ MASK CC
*FMASK  EQU $40     FIRQ MASK CC
*DATREG EQU $FFF0   DAT REGISTERS
*
*CF_BASE    EQU $E040
*CF_DATA    EQU CF_BASE+0
*CF_ERROR   EQU CF_BASE+1 ; read error
*CF_FEATURE EQU CF_BASE+1 ; write feature
*CF_SCNT  EQU CF_BASE+2
*CF_SNUM  EQU CF_BASE+3
*CF_CLO   EQU CF_BASE+4
*CF_CHI   EQU CF_BASE+5
*CF_HEAD    EQU CF_BASE+6
*CF_STATUS  EQU CF_BASE+7 ; read status
*CF_COMAND  EQU CF_BASE+7 ; write command
*
* Command Equates
*
*CMDREAD    EQU $20 ; Read Single sector
*CMDWRITE   EQU $30 ; Write Single sector
*CMDFEATURE EQU $EF
*FEAT8BIT   EQU $01 ; enable 8 bit transfers
*HEADLBA    EQU $E0
*
* Status bit equates
*
*BSY        EQU $80
*DRDY       EQU $40
*DRQ        EQU $08
*ERR        EQU $01
*
* Seek track and sector
* A holds track number (0 - ??)
* B holds sector number (1 - ??)
* Sector numbers starts from 1
* subtract 1 to start from sector 0 on CF
*
SEEK   DECB
       STB  CF_SNUM
       STA  CF_CLO
       LDB  DRNUM
       STB  CF_CHI
       LDB  #$01
       STB  CF_SCNT
       CLRB
       RTS
*
* READ SECTORS FROM CF
*
*
READ   BSR  SEEK
       LDA  #CMDREAD ; IDE READ MULTIPLE
       STA  CF_COMAND
       BSR  WTRDY
*
* READ LOOP
*
       CLRB
READ1  BSR  WTDRQ
       LDA  CF_DATA
       STA  ,X+
       DECB
       BNE  READ1
*
       CLRB
READ2  BSR  WTDRQ
       LDA  CF_DATA
       DECB
       BNE  READ2
*
       BSR  WTRDY
       CLRB
       RTS
*
* WAIT UNTIL READY
*
WTRDY   LDA  CF_STATUS
        BITA #BSY
        BNE  WTRDY
        LDA  CF_STATUS
        BITA #DRDY
        BEQ  WTRDY
        RTS
*
* WAIT FOR DATA REQUEST
*
WTDRQ   LDA  CF_STATUS
        BITA #DRQ
        BEQ  WTDRQ
        RTS
*
       END START

Line No.	Rev	Author	Line
1	47	davidgb	`*`
2			`** FLEX 9 COMPACT FLASH FORMAT PROGRAM`
3			`*`
4			`* FOR B5-X300 and CF with 8 Bit Transfer interface`
5			`*`
6			`*`
7			`CFLAG EQU $01 CARRY FLAG`
8			`VFLAG EQU $02 OVERFLOW FLAG`
9			`ZFLAG EQU $04 ZERO FLAG`
10			`NFLAG EQU $08 NEGATIVE FLAG`
11			`IFLAG EQU $10 IRQ MASK CC`
12			`HFLAG EQU $20 HALF CARRY`
13			`FFLAG EQU $40 FIRQ MASK CC`
14			`EFLAG EQU $80 ENTIRE FLAG`
15			`*`
16			`MAPPAG EQU $00 PAGE $0000 DAT ADDRESS`
17			`*`
18			`* Serial Port`
19			`*`
20			`ACIAS EQU $E000`
21			`ACIAC1 EQU ACIAS`
22			`ACIAD1 EQU ACIAS+1`
23			`DELCON EQU 1250 Delay (Processor clock in MHz * 50)`
24			`*`
25			`* XMODEM Control characters`
26			`*`
27			`SOH EQU $01`
28			`EOT EQU $04`
29			`ACK EQU $06`
30			`NAK EQU $15`
31			`CAN EQU $18`
32			`*`
33			`* Some dummy Constants`
34			`*`
35			`RMAXTRK EQU 64`
36			`RMAXSEC EQU 255`
37			`RTOTSEC EQU RMAXTRK*RMAXSEC-RMAXSEC`
38			`*`
39			`* Start`
40			`*`
41			`ORG $0100`
42			`START LBSR UFSUB`
43			`JMP [$F800] Jump to monitor on Completion.`
44			`*`
45			`*`
46			`* RAM SPACE`
47			`*`
48			`DRVNUM FCB 0`
49			`TRACK FCB 0`
50			`SECTOR FCB 0`
51			`CHKSUM FCB 0`
52			`BLKNUM FCB 0 Xmodem block number`
53			`BYTCNT FCB 0 Xmodem byte count`
54			`XSTATE FDB 0 Xmodem State Vector`
55			`DELCNT FCB $00,$00,$00 Xmodem Poll timer`
56			`MAXTRK FCB 0`
57			`MAXSEC FCB 0`
58			`ORG $0200`
59			`*`
60			`* SECTOR BUFFER`
61			`*`
62			`BUFFER RMB 256`
63			`*`
64			`*`
65			`* recieve char from remote drive.`
66			`* timeout if no response for approx 1s.`
67			`* Entry: no parameters`
68			`* Exit: (A) = recieved char, (C)=1 if valid char, (C)=0 if timeout.`
69			`*`
70			`RCHAR PSHS X,Y`
71			`*`
72			`LDX #1000 1000x inner loop`
73			`RCHAR1 LDY #DELCON delay constant for inner loop (approx 1ms).`
74			`RCHAR2 LDA ACIAC1 test for recieved char`
75			`ASRA`
76			`BCS RCHAR3 get character`
77			`LEAY -1,Y else, continue to count delay`
78			`BNE RCHAR2`
79			`LEAX -1,X`
80			`BNE RCHAR1`
81			`PULS X,Y,PC return with error if timed out`
82			`*`
83			`RCHAR3 LDA ACIAD1 return data (carry bit still set)`
84			`PULS X,Y,PC`
85			`*`
86			`*`
87			`* transmit char to remote drive.`
88			`* timeout if no response for approx 1s. (allows for use of hardware flow control)`
89			`* Entry: (A) = char to transmit`
90			`* Exit: (A) = recieved char, (C)=1 if valid char, (C)=0 if timeout.`
91			`*`
92			`SCHAR PSHS X,Y`
93			`PSHS A`
94			`*`
95			`LDX #1000 1000x inner loop`
96			`SCHAR1 LDY #DELCON delay constant for inner loop (approx 1ms).`
97			`SCHAR2 LDA ACIAC1 test for space in transmit FIFO`
98			`ASRA`
99			`ASRA`
100			`BCS SCHAR3 send character`
101			`LEAY -1,Y else, continue to count delay`
102			`BNE SCHAR2`
103			`LEAX -1,X`
104			`BNE SCHAR1`
105			`PULS A`
106			`PULS X,Y,PC return with error if timed out`
107			`*`
108			`SCHAR3 PULS A`
109			`STA ACIAD1 send data (carry bit still set)`
110			`PULS X,Y,PC`
111			`*`
112			`* Print Data`
113			`*`
114			`PDATA0 BSR SCHAR`
115			`PDATA1 LDA ,X+`
116			`CMPA #$04`
117			`BNE PDATA0`
118			`RTS`
119			`*`
120			`** 'UF' Format RAMdisc to FLEX standard.`
121			`*`
122			`DISFOS FCB $0A,$0D`
123			`FCC 'Formating RAMdisk... '`
124			`FCB $0A,$0D`
125			`FCC 'Drive Number ?'`
126			`FCB 4`
127			`MESS6 FCB $0A,$0D,4`
128			`FCC 'Ramdisk not allocated! '`
129			`FCB 4`
130			`UFMSG1 FCB $0A,$0D`
131			`FCC 'Format Complete'`
132			`FCB 4`
133			`*`
134			`UFSUB JSR INITDR`
135			`LDX #DISFOS`
136			`JSR PDATA1`
137			`UFSUB1 LBSR RCHAR`
138			`BCC UFSUB1`
139			`LBSR SCHAR`
140			`CMPA #'0'`
141			`LBLO UFEXIT`
142			`CMPA #'3'`
143			`LBHI UFEXIT`
144			`SUBA #'0'`
145			`TFR A,B`
146			`STB DRVNUM`
147			`LDX #DRVNUM-3`
148			`JSR DRVSEL`
149			`*`
150			`* set up free chain`
151			`*`
152			`LDX #BUFFER clear out buffer`
153			`CLRA`
154			`CLRB`
155			`DFL1 STA 0,X+`
156			`DECB`
157			`BNE DFL1`
158			`*`
159			`CLR TRACK`
160			`LDA #1`
161			`STA SECTOR`
162			`DFL2 LDX #BUFFER`
163			`LDA TRACK`
164			`STA 0,X`
165			`LDA SECTOR`
166			`INCA`
167			`CMPA #RMAXSEC+1 last sector on track?`
168			`BNE DFL3`
169			`INC 0,X`
170			`LDA #1`
171			`DFL3 STA 1,X`
172			`LDA TRACK`
173			`LDB SECTOR`
174			`JSR WRITSC`
175			`INC SECTOR`
176			`LDA SECTOR`
177			`CMPA #RMAXSEC+1`
178			`BNE DFL2`
179			`LDA #1`
180			`STA SECTOR`
181			`INC TRACK`
182			`LDA TRACK`
183			`CMPA #RMAXTRK`
184			`BNE DFL2`
185			`* break free chain at last track/sector`
186			`LDX #BUFFER`
187			`LDA #RMAXTRK-1`
188			`LDB #RMAXSEC`
189			`JSR READSC`
190			`LDX #BUFFER`
191			`CLR 0,X`
192			`CLR 1,X`
193			`LDA #RMAXTRK-1`
194			`LDB #RMAXSEC`
195			`JSR WRITSC`
196			`* set up sector structure, SIR, directory etc`
197			`LDX #BUFFER`
198			`CLRA`
199			`LDB #RMAXSEC`
200			`JSR READSC`
201			`LDX #BUFFER`
202			`CLR 0,X break end of directory chain`
203			`CLR 1,X`
204			`CLRA`
205			`LDB #RMAXSEC`
206			`JSR WRITSC`
207			`*`
208			`LDX #BUFFER`
209			`CLRA`
210			`LDB #3 set up SIR`
211			`JSR READSC`
212			`LDX #BUFFER`
213			`CLR 0,X break forward link`
214			`CLR 1,X`
215			`LDD #$5241 set volume name (RAMDISK )`
216			`STD 16,X`
217			`LDD #$4D44`
218			`STD 18,X`
219			`LDD #$4953`
220			`STD 20,X`
221			`LDD #$4B20`
222			`STD 22,X`
223			`LDD #1 volume number`
224			`STD 27,X`
225			`LDD #$0101 first trk/sec 01-01`
226			`STD 29,X`
227			`LDA #RMAXTRK-1`
228			`LDB #RMAXSEC`
229			`STD 31,X`
230			`STD 38,X`
231			`LDD #RTOTSEC total DATA sectors (2912-14)`
232			`STD 33,X`
233			`*`
234			`LDA #01 month set default creation date (SYS09's birthday!)`
235			`STA 35,X`
236			`LDA #07 day`
237			`STA 36,X`
238			`LDA #07 year`
239			`STA 37,X`
240			`*`
241			`RF3 CLRA`
242			`LDB #3`
243			`JSR WRITSC`
244			`*`
245			`* LDX #BUFFER`
246			`* CLRA`
247			`* LDB #1`
248			`* JSR READSC`
249			`* LDX #BUFFER`
250			`* LDA #$AA set the init flag`
251			`* STA 0,X`
252			`* LDA #$55`
253			`* STA 1,X`
254			`* CLRA`
255			`* LDB #1`
256			`* JSR WRITSC`
257			`*`
258			`* Write Boot sector`
259			`*`
260			`LDX #$C000`
261			`CLRA TRACK 0`
262			`LDB #$01 SECTOR 1`
263			`STA TRACK`
264			`STB SECTOR`
265			`LBSR WRITSC`
266			`*`
267			`UFEXIT LDX #UFMSG1`
268			`JMP PDATA1`
269			`*`
270			`*`
271			`** FLEX 9 COMPACT FLASH DISK DRIVERS`
272			`*`
273			`* FOR SYS09BUG 1.2 ON THE BURCHED B5-X300`
274			`* WITH I/O MAPPED AT $XE000`
275			`* AND ROM MAPPED AT $XF000`
276			`* THE BURCHED B5-X300 HAS 256KBYTES OF SRAM`
277			`* THE FIRST 64K IS USED BY FLEX,`
278			`* THE SECOND 192K MAY BE USED AS A RAM DISK`
279			`*`
280			`*`
281			`IMASK EQU $10 IRQ MASK CC`
282			`FMASK EQU $40 FIRQ MASK CC`
283			`DATREG EQU $FFF0 DAT REGISTERS`
284			`*`
285			`CF_BASE EQU $E040`
286			`CF_DATA EQU CF_BASE+0`
287			`CF_ERROR EQU CF_BASE+1 ; read error`
288			`CF_FEATURE EQU CF_BASE+1 ; write feature`
289			`CF_SCNT EQU CF_BASE+2`
290			`CF_SNUM EQU CF_BASE+3`
291			`CF_CLO EQU CF_BASE+4`
292			`CF_CHI EQU CF_BASE+5`
293			`CF_HEAD EQU CF_BASE+6`
294			`CF_STATUS EQU CF_BASE+7 ; read status`
295			`CF_COMAND EQU CF_BASE+7 ; write command`
296			`*`
297			`* Command Equates`
298			`*`
299			`CMDREAD EQU $20 ; Read Single sector`
300			`CMDWRITE EQU $30 ; Write Single sector`
301			`CMDFEATURE EQU $EF`
302			`FEAT8BIT EQU $01 ; enable 8 bit transfers`
303			`HEADLBA EQU $E0`
304			`*`
305			`* Status bit equates`
306			`*`
307			`BSY EQU $80`
308			`DRDY EQU $40`
309			`DRQ EQU $08`
310			`ERR EQU $01`
311			`*`
312			`*`
313			`* INITIALIZE CF CARD FOR 8 BIT LBA MODE`
314			`*`
315			`INITDR BSR WAITRDY`
316			`LDA #HEADLBA`
317			`STA CF_HEAD`
318			`LDA #FEAT8BIT`
319			`STA CF_FEATURE`
320			`LDA #CMDFEATURE`
321			`STA CF_COMAND`
322			`BRA WAITRDY`
323			`*`
324			`* RESTORE DISK DRIVER (SEEK TRACK 00)`
325			`*`
326			`RESTR1 BSR DRVSEL`
327			`CLRA ; Track 0`
328			`LDB #$01 ; Sector 1`
329			`*`
330			`* Seek track and sector`
331			`* A holds track number (0 - ??)`
332			`* B holds sector number (1 - ??)`
333			`* Sector numbers starts from 1`
334			`* subtract 1 to start from sector 0 on CF`
335			`*`
336			`SEEKTS DECB`
337			`STB CF_SNUM`
338			`STA CF_CLO`
339			`LDB DRVNUM`
340			`STB CF_CHI`
341			`LDB #$01`
342			`STB CF_SCNT`
343			`CLRB`
344			`RTS`
345			`*`
346			`* READ SECTORS FROM CF`
347			`*`
348			`*`
349			`READSC BSR SEEKTS`
350			`LDA #CMDREAD ; IDE READ MULTIPLE`
351			`STA CF_COMAND`
352			`BSR WAITRDY`
353			`*`
354			`* READ LOOP`
355			`*`
356			`CLRB`
357			`RDLP1 BSR WAITDRQ`
358			`LDA CF_DATA`
359			`STA ,X+`
360			`DECB`
361			`BNE RDLP1`
362			`*`
363			`CLRB`
364			`RDLP2 BSR WAITDRQ`
365			`LDA CF_DATA`
366			`DECB`
367			`BNE RDLP2`
368			`*`
369			`BSR WAITRDY`
370			`CLRB`
371			`RTS`
372			`*`
373			`* WRITE SECTOR TO CF`
374			`*`
375			`WRITSC BSR SEEKTS ; SEEK TRACK & SECTOR`
376			`LDA #CMDWRITE ; IDE WRITE MULTIPLE`
377			`STA CF_COMAND`
378			`BSR WAITRDY`
379			`*`
380			`* WRITE LOOP`
381			`*`
382			`CLRB`
383			`WRTLP1 BSR WAITDRQ`
384			`LDA ,X+`
385			`STA CF_DATA`
386			`DECB`
387			`BNE WRTLP1`
388			`*`
389			`CLRB`
390			`WRTLP2 BSR WAITDRQ`
391			`CLRA`
392			`STA CF_DATA`
393			`DECB`
394			`BNE WRTLP2`
395			`*`
396			`BSR WAITRDY`
397			`CLRB`
398			`RTS`
399			`*`
400			`* CHECK FOR BUSY`
401			`* Doubles as VERIFY`
402			`*`
403			`BUSY CLRB Never busy`
404			`RTS`
405			`*`
406			`* DRIVE SELECT DISK DRIVER`
407			`*`
408			`DRVSEL LDA 3,X GET DRIVE # FROM FCB`
409			`CMPA #3`
410			`BLS DRVS2 IF > 3, SET IT TO 0`
411			`CLRA`
412			`DRVS2 STA DRVNUM`
413			`CLRB ; SET Z, CLEAR C`
414			`RTS`
415			`*`
416			`* CHECK DRIVE READY DISK DRIVER`
417			`*`
418			`CHKDRV LDA 3,X`
419			`CLRB ; CLEAR C, SET Z`
420			`RTS`
421			`*`
422			`* WAIT UNTIL READY`
423			`*`
424			`WAITRDY LDA CF_STATUS`
425			`BITA #BSY`
426			`BNE WAITRDY`
427			`LDA CF_STATUS`
428			`BITA #DRDY`
429			`BEQ WAITRDY`
430			`RTS`
431			`*`
432			`* WAIT FOR DATA REQUEST`
433			`*`
434			`WAITDRQ LDA CF_STATUS`
435			`BITA #DRQ`
436			`BEQ WAITDRQ`
437			`RTS`
438			`*`
439			`*******************************************************`
440			`*`
441			`* Bootstrap FLEX Loader`
442			`*`
443			`* SBUG1.8 loads the bootstap loader at $C000`
444			`* however the Flex adaption manual has the`
445			`* bootstrap loader residing at $C100`
446			`*`
447			`******************************************************`
448			`*`
449			`* Equates`
450			`*`
451			`STACK EQU $C0FF`
452			`SCTBUF EQU $C300`
453			`*`
454			`* Start of Utility`
455			`*`
456			`ORG $C000`
457			`BOOT BRA LOAD0`
458			`FCB 0,0,0`
459			`TRK FCB 0 File start track`
460			`SCT FCB 0 File start sector`
461			`DNS FCB 0 Density Flag (not used)`
462			`TADR FDB $C000 Transfer address`
463			`LADR FDB 0 Load Address`
464			`DRNUM FCB 0 Drive number 0`
465			`*`
466			`LOAD0 LDS #STACK Set up stack`
467			`LDD TRK Set up start track and sector`
468			`STD SCTBUF`
469			`LDY #SCTBUF+256`
470			`*`
471			`* Perform actual file load`
472			`*`
473			`LOAD1 BSR GETCH Get acharcater`
474			`CMPA #$02 Data record hearder ?`
475			`BEQ LOAD2 Skip, is so`
476			`CMPA #$16 Xfr address hearder ?`
477			`BNE LOAD1 Loop if neither`
478			`*`
479			`* Get transfer address`
480			`*`
481			`BSR GETCH`
482			`STA TADR`
483			`BSR GETCH`
484			`STA TADR+1`
485			`BRA LOAD1`
486			`*`
487			`* Load data record`
488			`*`
489			`LOAD2 BSR GETCH Get load address`
490			`STA LADR`
491			`BSR GETCH`
492			`STA LADR+1`
493			`BSR GETCH Get Bytes count`
494			`TFR A,B`
495			`TSTB`
496			`BEQ LOAD1 Loop if count = 0`
497			`LDX LADR Get load address`
498			`LOAD3 PSHS B,X`
499			`BSR GETCH Get data character`
500			`PULS B,X`

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