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dilbert57 |
Assembler release DWC_2.0 version 2.11
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May 6, 2004 (c) Motorola (free ware)
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0001 *
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0002 ** FLEX 9 DISK DRIVERS
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0003 *
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0004 * FOR SYS09BUG ON THE DIGILENT SPARTAN 3 STARTER BOARD
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0005 * WITH I/O MAPPED AT $XE000
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0006 * AND ROM MAPPED AT $XF000
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0007 * THE DIGILENT SPARTAN 3 STARTER BOARD HAS 1MBYTE OF SRAM
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0008 * THE FIRST 64K IS USED BY FLEX,
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0009 * THE SECOND 128K IS USED AS A ROM DISK
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0010 * THE REMAINING RAM IS USED FOR A RAM DISK
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0011 *
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0012 *
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0013 0001 CFLAG EQU $01 CARRY FLAG
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0014 0002 VFLAG EQU $02 OVERFLOW FLAG
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0015 0004 ZFLAG EQU $04 ZERO FLAG
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0016 0008 NFLAG EQU $08 NEGATIVE FLAG
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0017 0010 IFLAG EQU $10 IRQ MASK CC
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0018 0020 HFLAG EQU $20 HALF CARRY
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0019 0040 FFLAG EQU $40 FIRQ MASK CC
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0020 0080 EFLAG EQU $80 ENTIRE FLAG
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0021 *
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0022 0000 MAPPAG EQU $00 PAGE $0000 DAT ADDRESS
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0023 *
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0024 * Serial Port
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0025 *
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0026 E000 ACIAS EQU $E000
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0027 E000 ACIAC1 EQU ACIAS
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0028 E001 ACIAD1 EQU ACIAS+1
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0029 04E2 DELCON EQU 1250 Delay (Processor clock in MHz * 50)
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0030 *
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0031 * XMODEM Control characters
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0032 *
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0033 0001 SOH EQU $01
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0034 0004 EOT EQU $04
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0035 0006 ACK EQU $06
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0036 0015 NAK EQU $15
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0037 0018 CAN EQU $18
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0038 *
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0039 * Some dummy Constants
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0040 *
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0041 0040 RMAXTRK EQU 64
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0042 00FF RMAXSEC EQU 255
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0043 3EC1 RTOTSEC EQU RMAXTRK*RMAXSEC-RMAXSEC
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0044 *
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0045 * Start
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0046 *
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0047 0100 ORG $0100
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0048 0100 17 03 30 START LBSR UXSUB
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0049 0103 6E 9F F8 00 JMP [$F800] Jump to monitor on Completion.
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0050 *
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0051 *
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0052 * RAM SPACE
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0053 *
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0054 0107 00 DRVNUM FCB 0
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0055 0108 00 TRACK FCB 0
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0056 0109 00 SECTOR FCB 0
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0057 010A 00 CHKSUM FCB 0
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0058 010B 00 BLKNUM FCB 0 Xmodem block number
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0059 010C 00 BYTCNT FCB 0 Xmodem byte count
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0060 010D 00 00 XSTATE FDB 0 Xmodem State Vector
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0061 010F 00 00 00 DELCNT FCB $00,$00,$00 Xmodem Poll timer
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0062 0112 00 MAXTRK FCB 0
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0063 0113 00 MAXSEC FCB 0
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0064 0200 ORG $0200
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0065 *
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0066 * SECTOR BUFFER
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0067 *
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0068 0200 BUFFER RMB 256
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0069 *
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0070 *
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0071 * recieve char from remote drive.
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0072 * timeout if no response for approx 1s.
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0073 * Entry: no parameters
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0074 * Exit: (A) = recieved char, (C)=1 if valid char, (C)=0 if timeout.
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0075 *
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0076 0300 34 30 RCHAR PSHS X,Y
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0077 *
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0078 0302 8E 03 E8 LDX #1000 1000x inner loop
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0079 0305 10 8E 04 E2 RCHAR1 LDY #DELCON delay constant for inner loop (approx 1ms).
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0080 0309 B6 E0 00 RCHAR2 LDA ACIAC1 test for recieved char
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0081 030C 47 ASRA
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0082 030D 25 0A BCS RCHAR3 get character
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0083 030F 31 3F LEAY -1,Y else, continue to count delay
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0084 0311 26 F6 BNE RCHAR2
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0085 0313 30 1F LEAX -1,X
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0086 0315 26 EE BNE RCHAR1
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0087 0317 35 B0 PULS X,Y,PC return with error if timed out
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0088 *
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0089 0319 B6 E0 01 RCHAR3 LDA ACIAD1 return data (carry bit still set)
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0090 031C 35 B0 PULS X,Y,PC
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0091 *
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0092 *
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0093 * transmit char to remote drive.
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0094 * timeout if no response for approx 1s. (allows for use of hardware flow control)
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0095 * Entry: (A) = char to transmit
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0096 * Exit: (A) = recieved char, (C)=1 if valid char, (C)=0 if timeout.
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0097 *
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0098 031E 34 30 SCHAR PSHS X,Y
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0099 0320 34 02 PSHS A
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0100 *
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0101 0322 8E 03 E8 LDX #1000 1000x inner loop
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0102 0325 10 8E 04 E2 SCHAR1 LDY #DELCON delay constant for inner loop (approx 1ms).
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0103 0329 B6 E0 00 SCHAR2 LDA ACIAC1 test for space in transmit FIFO
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0104 032C 47 ASRA
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0105 032D 47 ASRA
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0106 032E 25 0C BCS SCHAR3 send character
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0107 0330 31 3F LEAY -1,Y else, continue to count delay
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0108 0332 26 F5 BNE SCHAR2
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0109 0334 30 1F LEAX -1,X
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0110 0336 26 ED BNE SCHAR1
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0111 0338 35 02 PULS A
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0112 033A 35 B0 PULS X,Y,PC return with error if timed out
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0113 *
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0114 033C 35 02 SCHAR3 PULS A
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0115 033E B7 E0 01 STA ACIAD1 send data (carry bit still set)
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0116 0341 35 B0 PULS X,Y,PC
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0117 *
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0118 * Read a byte from the serial port
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0119 *
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0120 0343 34 04 LRBYTE PSHS B
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0121 0345 8D 0E BSR LRHEX Get hex digit.
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0122 0347 48 ASLA
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0123 0348 48 ASLA Shift to msb.
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0124 0349 48 ASLA
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0125 034A 48 ASLA
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0126 034B 1F 89 TFR A,B Save in B.
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0127 034D 8D 06 BSR LRHEX Get next digit.
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0128 034F 34 04 PSHS B
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0129 0351 AB E0 ADDA 0,S+ Add together bytes.
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0130 0353 35 84 PULS B,PC
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0131 *
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0132 0355 BD 03 7E LRHEX JSR INTER
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0133 0358 29 FB BVS LRHEX
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0134 035A 80 30 SUBA #$30 Remove ascii bias.
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0135 035C 2B F7 BMI LRHEX
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0136 035E 81 09 CMPA #$09 Number?
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0137 0360 2F 0A BLE LRHEX1 Yes.
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0138 0362 81 11 CMPA #$11 Keep testing.
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0139 0364 2B EF BMI LRHEX
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0140 0366 81 16 CMPA #$16
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0141 0368 2E EB BGT LRHEX
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0142 036A 80 07 SUBA #$07
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0143 036C 39 LRHEX1 RTS
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0144 *
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0145 * ACIA INPUT TEST
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0146 *
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0147 036D B6 E0 00 INTEST LDA ACIAC1
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0148 0370 85 01 BITA #$01
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0149 0372 39 RTS
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0150 *
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0151 * RESET ACIA
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0152 *
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0153 0373 86 03 ACIRST LDA #$03 master reset
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0154 0375 B7 E0 00 STA ACIAC1
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0155 0378 86 11 LDA #$11
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0156 037A B7 E0 00 STA ACIAC1
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0157 037D 39 RTS
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0158 *
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0159 * ACIA INPUT
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0160 *
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0161 037E 86 10 INTER LDA #16
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0162 0380 B7 01 0F STA DELCNT+0
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0163 0383 7F 01 10 CLR DELCNT+1
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0164 0386 7F 01 11 CLR DELCNT+2
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0165 0389 B6 E0 00 INTER0 LDA ACIAC1
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0166 038C 85 01 BITA #$01
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0167 038E 26 08 BNE INTER1
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0168 0390 85 78 BITA #$78
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0169 0392 27 0A BEQ INTER2
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0170 0394 8D DD BSR ACIRST
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0171 0396 20 E6 BRA INTER
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0172 *
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0173 0398 B6 E0 01 INTER1 LDA ACIAD1
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0174 039B 1C FD ANDCC #$FF-VFLAG
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0175 039D 39 RTS
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0176 *
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0177 039E 7A 01 11 INTER2 DEC DELCNT+2
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0178 03A1 26 E6 BNE INTER0
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0179 03A3 7A 01 10 DEC DELCNT+1
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0180 03A6 26 E1 BNE INTER0
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0181 03A8 7A 01 0F DEC DELCNT+0
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0182 03AB 26 DC BNE INTER0
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0183 03AD 4F CLRA
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0184 03AE 1A 02 ORCC #VFLAG
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0185 03B0 39 RTS
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0186 *
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0187 * ACIA OUTPUT
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0188 *
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0189 03B1 34 02 OUTTER PSHS A
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0190 *
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0191 03B3 B6 E0 00 OUTTE1 LDA ACIAC1
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0192 03B6 85 02 BITA #$02
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0193 03B8 26 08 BNE OUTTE2
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0194 03BA 85 78 BITA #$78
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0195 03BC 27 F5 BEQ OUTTE1
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0196 03BE 8D B3 BSR ACIRST
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0197 03C0 20 F1 BRA OUTTE1
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0198 *
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0199 03C2 35 02 OUTTE2 PULS A
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0200 03C4 B7 E0 01 STA ACIAD1
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0201 03C7 39 RTS
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0202 *
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0203 * Print Data
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0204 *
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0205 03C8 8D E7 PDATA0 BSR OUTTER
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0206 03CA A6 80 PDATA1 LDA ,X+
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0207 03CC 81 04 CMPA #$04
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0208 03CE 26 F8 BNE PDATA0
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0209 03D0 39 RTS
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0210 *
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0211 *
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0212 ** 'UX' Xmodem ROM Disk upload
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0213 *
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0214 03D1 0D 0A UXMES0 FCB $0D,$0A
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0215 03D3 58 6D 6F 64 65 6D FCC 'Xmodem ROM Disk Upload'
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20 52 4F 4D 20 44
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69 73 6B 20 55 70
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6C 6F 61 64
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0216 03E9 04 FCB 4
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0217 03EA 0D 0A UXMES1 FCB $0D,$0A
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0218 03EC 55 70 6C 6F 61 64 FCC 'Upload Complete'
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20 43 6F 6D 70 6C
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65 74 65
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0219 03FB 04 FCB 4
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0220 03FC 0D 0A UXMES2 FCB $0D,$0A
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| 228 |
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0221 03FE 55 70 6C 6F 61 64 FCC 'Upload Error'
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| 229 |
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20 45 72 72 6F 72
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| 230 |
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0222 040A 04 FCB 4
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| 231 |
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0223 040B 0D 0A UXMSG3 FCB $0D,$0A
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| 232 |
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0224 040D 44 72 69 76 65 20 FCC 'Drive Number :'
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| 233 |
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4E 75 6D 62 65 72
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| 234 |
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20 3A
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| 235 |
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0225 041B 04 FCB 4
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| 236 |
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0226 041C 0D 0A UXMSG4 FCB $0D,$0A
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| 237 |
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0227 041E 41 72 65 20 59 6F FCC 'Are You Sure ? (Y/N)'
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| 238 |
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75 20 53 75 72 65
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| 239 |
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20 3F 20 28 59 2F
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| 240 |
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4E 29
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| 241 |
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0228 0432 04 FCB 4
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| 242 |
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0229 *
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| 243 |
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0230 * Print Banner
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| 244 |
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0231 *
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| 245 |
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0232 0433 8E 03 D1 UXSUB LDX #UXMES0
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| 246 |
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0233 0436 17 FF 91 LBSR PDATA1
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| 247 |
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0234 *
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| 248 |
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0235 * Prompt for Disk drive number (0 to 3)
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| 249 |
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0236 *
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| 250 |
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0237 0439 8E 04 0B LDX #UXMSG3
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| 251 |
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0238 043C 17 FF 8B LBSR PDATA1
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| 252 |
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0239 043F 17 FF 3C UXSUB1 LBSR INTER
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| 253 |
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0240 0442 29 FB BVS UXSUB1
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| 254 |
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0241 0444 17 FF 6A LBSR OUTTER
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| 255 |
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0242 0447 81 30 CMPA #'0
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| 256 |
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0243 0449 10 25 01 2E LBLO UXEXIT
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| 257 |
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0244 044D 81 33 CMPA #'3
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| 258 |
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0245 044F 10 22 01 28 LBHI UXEXIT
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| 259 |
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0246 0453 80 30 SUBA #'0
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| 260 |
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0247 0455 B7 01 07 STA DRVNUM
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| 261 |
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0248 *
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| 262 |
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0249 * Report selected drive
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| 263 |
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0250 *
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| 264 |
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0251 0458 8E 04 0B LDX #UXMSG3
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| 265 |
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0252 045B 17 FF 6C LBSR PDATA1
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| 266 |
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0253 045E B6 01 07 LDA DRVNUM
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| 267 |
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0254 0461 8B 30 ADDA #'0
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| 268 |
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0255 0463 17 FF 4B LBSR OUTTER
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| 269 |
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0256 *
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| 270 |
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0257 * Ask for confirmation (Y/N)
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| 271 |
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0258 *
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| 272 |
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0259 0466 8E 04 1C LDX #UXMSG4
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| 273 |
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0260 0469 17 FF 5E LBSR PDATA1
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| 274 |
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0261 046C 17 FF 0F UXSUB2 LBSR INTER
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| 275 |
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0262 046F 29 FB BVS UXSUB2
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| 276 |
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0263 0471 17 FF 3D LBSR OUTTER
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| 277 |
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0264 0474 84 5F ANDA #$5F
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| 278 |
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0265 0476 81 4E CMPA #'N
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| 279 |
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0266 0478 10 27 00 FF LBEQ UXEXIT
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| 280 |
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0267 047C 81 59 CMPA #'Y
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| 281 |
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0268 047E 26 B3 BNE UXSUB
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| 282 |
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0269 *
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| 283 |
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0270 * We have confirmation ... now load the disk image
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| 284 |
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0271 *
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| 285 |
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0272 0480 17 01 B1 LBSR INITDR
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| 286 |
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0273 0483 CE 05 A4 LDU #XSTST
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| 287 |
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0274 0486 FF 01 0D STU XSTATE
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| 288 |
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0275 0489 86 01 LDA #1
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| 289 |
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0276 048B B7 01 0B STA BLKNUM
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| 290 |
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0277 *
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| 291 |
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0278 * Sector1
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| 292 |
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0279 *
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| 293 |
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0280 048E 8E 02 00 LDX #BUFFER
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| 294 |
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0281 *
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| 295 |
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0282 0491 4F CLRA TRACK 0
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| 296 |
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0283 0492 C6 01 LDB #$01 SECTOR 1
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| 297 |
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0284 0494 B7 01 08 STA TRACK
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| 298 |
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0285 0497 F7 01 09 STB SECTOR
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| 299 |
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0286 *
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| 300 |
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0287 049A 17 00 EA LBSR XREAD
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| 301 |
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0288 049D 10 25 00 E0 LBCS UXERR
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| 302 |
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0289 04A1 17 01 87 LBSR XACK
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| 303 |
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0290 04A4 17 00 E0 LBSR XREAD
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| 304 |
|
|
0291 04A7 10 25 00 D6 LBCS UXERR
|
| 305 |
|
|
0292 *
|
| 306 |
|
|
0293 04AB 8E 02 00 LDX #BUFFER
|
| 307 |
|
|
0294 04AE B6 01 08 LDA TRACK
|
| 308 |
|
|
0295 04B1 F6 01 09 LDB SECTOR
|
| 309 |
|
|
0296 04B4 17 01 D1 LBSR WRITSC
|
| 310 |
|
|
0297 04B7 17 01 71 LBSR XACK
|
| 311 |
|
|
0298 *
|
| 312 |
|
|
0299 * Sector 2
|
| 313 |
|
|
0300 *
|
| 314 |
|
|
0301 04BA 8E 02 00 LDX #BUFFER
|
| 315 |
|
|
0302 *
|
| 316 |
|
|
0303 04BD B6 01 08 LDA TRACK
|
| 317 |
|
|
0304 04C0 F6 01 09 LDB SECTOR
|
| 318 |
|
|
0305 04C3 5C INCB
|
| 319 |
|
|
0306 04C4 B7 01 08 STA TRACK
|
| 320 |
|
|
0307 04C7 F7 01 09 STB SECTOR
|
| 321 |
|
|
0308 *
|
| 322 |
|
|
0309 04CA 17 00 BA LBSR XREAD
|
| 323 |
|
|
0310 04CD 10 25 00 B0 LBCS UXERR
|
| 324 |
|
|
0311 04D1 17 01 57 LBSR XACK
|
| 325 |
|
|
0312 04D4 17 00 B0 LBSR XREAD
|
| 326 |
|
|
0313 04D7 10 25 00 A6 LBCS UXERR
|
| 327 |
|
|
0314 *
|
| 328 |
|
|
0315 04DB 8E 02 00 LDX #BUFFER
|
| 329 |
|
|
0316 04DE B6 01 08 LDA TRACK
|
| 330 |
|
|
0317 04E1 F6 01 09 LDB SECTOR
|
| 331 |
|
|
0318 04E4 17 01 A1 LBSR WRITSC
|
| 332 |
|
|
0319 *
|
| 333 |
|
|
0320 04E7 17 01 41 LBSR XACK
|
| 334 |
|
|
0321 *
|
| 335 |
|
|
0322 * Sector 3 - SIR
|
| 336 |
|
|
0323 *
|
| 337 |
|
|
0324 04EA 8E 02 00 LDX #BUFFER
|
| 338 |
|
|
0325 *
|
| 339 |
|
|
0326 04ED B6 01 08 LDA TRACK
|
| 340 |
|
|
0327 04F0 F6 01 09 LDB SECTOR
|
| 341 |
|
|
0328 04F3 5C INCB
|
| 342 |
|
|
0329 04F4 B7 01 08 STA TRACK
|
| 343 |
|
|
0330 04F7 F7 01 09 STB SECTOR
|
| 344 |
|
|
0331 *
|
| 345 |
|
|
0332 04FA 17 00 8A LBSR XREAD
|
| 346 |
|
|
0333 04FD 10 25 00 80 LBCS UXERR
|
| 347 |
|
|
0334 0501 17 01 27 LBSR XACK
|
| 348 |
|
|
0335 0504 17 00 80 LBSR XREAD
|
| 349 |
|
|
0336 0507 10 25 00 76 LBCS UXERR
|
| 350 |
|
|
0337 *
|
| 351 |
|
|
0338 050B 8E 02 00 LDX #BUFFER
|
| 352 |
|
|
0339 050E A6 88 26 LDA 38,X
|
| 353 |
|
|
0340 0511 4C INCA
|
| 354 |
|
|
0341 0512 B7 01 12 STA MAXTRK
|
| 355 |
|
|
0342 0515 E6 88 27 LDB 39,X
|
| 356 |
|
|
0343 0518 5C INCB
|
| 357 |
|
|
0344 0519 F7 01 13 STB MAXSEC
|
| 358 |
|
|
0345 051C B6 01 08 LDA TRACK
|
| 359 |
|
|
0346 051F F6 01 09 LDB SECTOR
|
| 360 |
|
|
0347 0522 17 01 63 LBSR WRITSC
|
| 361 |
|
|
0348 *
|
| 362 |
|
|
0349 0525 17 01 03 LBSR XACK
|
| 363 |
|
|
0350 *
|
| 364 |
|
|
0351 * Sector 4 to Last Track & Sector
|
| 365 |
|
|
0352 *
|
| 366 |
|
|
0353 *
|
| 367 |
|
|
0354 0528 B6 01 08 LDA TRACK
|
| 368 |
|
|
0355 052B F6 01 09 LDB SECTOR
|
| 369 |
|
|
0356 052E 5C INCB
|
| 370 |
|
|
0357 *
|
| 371 |
|
|
0358 052F 8E 02 00 UXLOOP LDX #BUFFER
|
| 372 |
|
|
0359 0532 B7 01 08 STA TRACK
|
| 373 |
|
|
0360 0535 F7 01 09 STB SECTOR
|
| 374 |
|
|
0361 *
|
| 375 |
|
|
0362 0538 17 00 4C LBSR XREAD
|
| 376 |
|
|
0363 053B 10 25 00 42 LBCS UXERR
|
| 377 |
|
|
0364 053F 17 00 E9 LBSR XACK
|
| 378 |
|
|
0365 0542 17 00 42 LBSR XREAD
|
| 379 |
|
|
0366 0545 10 25 00 38 LBCS UXERR
|
| 380 |
|
|
0367 *
|
| 381 |
|
|
0368 0549 8E 02 00 LDX #BUFFER
|
| 382 |
|
|
0369 054C B6 01 08 LDA TRACK
|
| 383 |
|
|
0370 054F F6 01 09 LDB SECTOR
|
| 384 |
|
|
0371 0552 17 01 33 LBSR WRITSC
|
| 385 |
|
|
0372 0555 17 00 D3 LBSR XACK
|
| 386 |
|
|
0373 *
|
| 387 |
|
|
0374 0558 B6 01 08 LDA TRACK
|
| 388 |
|
|
0375 055B F6 01 09 LDB SECTOR
|
| 389 |
|
|
0376 055E 5C INCB
|
| 390 |
|
|
0377 055F F1 01 13 CMPB MAXSEC
|
| 391 |
|
|
0378 0562 26 CB BNE UXLOOP
|
| 392 |
|
|
0379 0564 C6 01 LDB #1
|
| 393 |
|
|
0380 0566 4C INCA
|
| 394 |
|
|
0381 0567 B1 01 12 CMPA MAXTRK
|
| 395 |
|
|
0382 056A 26 C3 BNE UXLOOP
|
| 396 |
|
|
0383 *
|
| 397 |
|
|
0384 *
|
| 398 |
|
|
0385 * Write Boot sector
|
| 399 |
|
|
0386 *
|
| 400 |
|
|
0387 056C 8E C0 00 LDX #$C000
|
| 401 |
|
|
0388 056F 4F CLRA TRACK 0
|
| 402 |
|
|
0389 0570 C6 01 LDB #$01 SECTOR 1
|
| 403 |
|
|
0390 0572 B7 01 08 STA TRACK
|
| 404 |
|
|
0391 0575 F7 01 09 STB SECTOR
|
| 405 |
|
|
0392 0578 17 01 0D LBSR WRITSC
|
| 406 |
|
|
0393 *
|
| 407 |
|
|
0394 057B 8E 03 EA UXEXIT LDX #UXMES1
|
| 408 |
|
|
0395 057E 7E 03 CA JMP PDATA1
|
| 409 |
|
|
0396 *
|
| 410 |
|
|
0397 0581 8E 03 FC UXERR LDX #UXMES2
|
| 411 |
|
|
0398 0584 16 FE 43 LBRA PDATA1
|
| 412 |
|
|
0399 *
|
| 413 |
|
|
0400 * Get a Byte using XModem protocol
|
| 414 |
|
|
0401 * Carry clear => no errors
|
| 415 |
|
|
0402 * Carry set => errors
|
| 416 |
|
|
0403 *
|
| 417 |
|
|
0404 0587 34 40 XREAD PSHS U
|
| 418 |
|
|
0405 0589 FE 01 0D LDU XSTATE
|
| 419 |
|
|
0406 *
|
| 420 |
|
|
0407 058C 17 FD EF XBYTE0 LBSR INTER
|
| 421 |
|
|
0408 058F 28 0A BVC XBYTE1
|
| 422 |
|
|
0409 0591 86 15 LDA #NAK
|
| 423 |
|
|
0410 0593 17 FE 1B LBSR OUTTER
|
| 424 |
|
|
0411 0596 CE 05 A4 LDU #XSTST
|
| 425 |
|
|
0412 0599 20 F1 BRA XBYTE0
|
| 426 |
|
|
0413 *
|
| 427 |
|
|
0414 059B AD C4 XBYTE1 JSR ,U
|
| 428 |
|
|
0415 059D 26 ED BNE XBYTE0
|
| 429 |
|
|
0416 059F FF 01 0D STU XSTATE
|
| 430 |
|
|
0417 05A2 35 C0 PULS U,PC
|
| 431 |
|
|
0418 *
|
| 432 |
|
|
0419 * START - LOOK FOR SOH (START OF HEADER) = $01
|
| 433 |
|
|
0420 *
|
| 434 |
|
|
0421 05A4 81 01 XSTST CMPA #SOH
|
| 435 |
|
|
0422 05A6 26 06 BNE XSTST1
|
| 436 |
|
|
0423 05A8 CE 05 C4 LDU #XSTBL
|
| 437 |
|
|
0424 05AB 1C FA ANDCC #$FF-CFLAG-ZFLAG No abort, no valid data (no exit)
|
| 438 |
|
|
0425 05AD 39 RTS
|
| 439 |
|
|
0426 *
|
| 440 |
|
|
0427 05AE 81 04 XSTST1 CMPA #EOT
|
| 441 |
|
|
0428 05B0 26 08 BNE XSTST2
|
| 442 |
|
|
0429 05B2 86 06 LDA #ACK
|
| 443 |
|
|
0430 05B4 17 FD FA LBSR OUTTER
|
| 444 |
|
|
0431 05B7 1A 05 ORCC #CFLAG+ZFLAG Set (c)=1 abort & exit
|
| 445 |
|
|
0432 05B9 39 RTS
|
| 446 |
|
|
0433 *
|
| 447 |
|
|
0434 05BA 81 18 XSTST2 CMPA #CAN
|
| 448 |
|
|
0435 05BC 26 03 BNE XSTST3
|
| 449 |
|
|
0436 05BE 1A 05 ORCC #CFLAG+ZFLAG Set (c)=1 abort & exit
|
| 450 |
|
|
0437 05C0 39 RTS
|
| 451 |
|
|
0438 *
|
| 452 |
|
|
0439 05C1 1C FA XSTST3 ANDCC #$FF-CFLAG-ZFLAG
|
| 453 |
|
|
0440 05C3 39 RTS
|
| 454 |
|
|
0441 *
|
| 455 |
|
|
0442 * Got SOH
|
| 456 |
|
|
0443 * Now get block number
|
| 457 |
|
|
0444 *
|
| 458 |
|
|
0445 05C4 B1 01 0B XSTBL CMPA BLKNUM
|
| 459 |
|
|
0446 05C7 26 06 BNE XSTBLE
|
| 460 |
|
|
0447 05C9 CE 05 DA LDU #XSTCOM
|
| 461 |
|
|
0448 05CC 1C FA ANDCC #$FF-CFLAG-ZFLAG No abort, No valid data (no exit)
|
| 462 |
|
|
0449 05CE 39 RTS
|
| 463 |
|
|
0450 *
|
| 464 |
|
|
0451 * Error in block number
|
| 465 |
|
|
0452 *
|
| 466 |
|
|
0453 05CF 86 15 XSTBLE LDA #NAK
|
| 467 |
|
|
0454 05D1 17 FD DD LBSR OUTTER
|
| 468 |
|
|
0455 05D4 CE 05 A4 LDU #XSTST
|
| 469 |
|
|
0456 05D7 1C FA ANDCC #$FF-CFLAG-ZFLAG No abort, No valid data (no exit)
|
| 470 |
|
|
0457 05D9 39 RTS
|
| 471 |
|
|
0458 *
|
| 472 |
|
|
0459 * Get complement of block number
|
| 473 |
|
|
0460 *
|
| 474 |
|
|
0461 05DA 43 XSTCOM COMA
|
| 475 |
|
|
0462 05DB B1 01 0B CMPA BLKNUM
|
| 476 |
|
|
0463 05DE 26 EF BNE XSTBLE
|
| 477 |
|
|
0464 05E0 7F 01 0A CLR CHKSUM
|
| 478 |
|
|
0465 05E3 86 80 LDA #128
|
| 479 |
|
|
0466 05E5 B7 01 0C STA BYTCNT
|
| 480 |
|
|
0467 05E8 CE 05 EE LDU #XSTDA
|
| 481 |
|
|
0468 05EB 1C FA ANDCC #$FF-CFLAG-ZFLAG No abort, No valid data (no exit)
|
| 482 |
|
|
0469 05ED 39 RTS
|
| 483 |
|
|
0470 *
|
| 484 |
|
|
0471 * Get data bytes
|
| 485 |
|
|
0472 *
|
| 486 |
|
|
0473 05EE 34 02 XSTDA PSHS A
|
| 487 |
|
|
0474 05F0 BB 01 0A ADDA CHKSUM
|
| 488 |
|
|
0475 05F3 B7 01 0A STA CHKSUM
|
| 489 |
|
|
0476 05F6 35 02 PULS A
|
| 490 |
|
|
0477 05F8 7A 01 0C DEC BYTCNT
|
| 491 |
|
|
0478 05FB 26 03 BNE XSTDA1
|
| 492 |
|
|
0479 05FD CE 06 05 LDU #XSTCK
|
| 493 |
|
|
0480 0600 A7 80 XSTDA1 STA ,X+
|
| 494 |
|
|
0481 0602 1C FA ANDCC #$FF-CFLAG-ZFLAG No abort, no valid data (no exit)
|
| 495 |
|
|
0482 0604 39 RTS
|
| 496 |
|
|
0483 *
|
| 497 |
|
|
0484 * Byte count reached zero
|
| 498 |
|
|
0485 * Check checksum byte
|
| 499 |
|
|
0486 *
|
| 500 |
|
|
0487 0605 B1 01 0A XSTCK CMPA CHKSUM
|
| 501 |
|
|
0488 0608 26 0B BNE XSTCK1 retry if wrong checksum
|
| 502 |
|
|
0489 *
|
| 503 |
|
|
0490 * Checksum OK ...
|
| 504 |
|
|
0491 * increment block number
|
| 505 |
|
|
0492 * Don't send ACK until data written to CF
|
| 506 |
|
|
0493 *
|
| 507 |
|
|
0494 060A 7C 01 0B INC BLKNUM
|
| 508 |
|
|
0495 060D CE 05 A4 LDU #XSTST
|
| 509 |
|
|
0496 0610 1C FE ANDCC #$FF-CFLAG No abort
|
| 510 |
|
|
0497 0612 1A 04 ORCC #ZFLAG Valid data (exit)
|
| 511 |
|
|
0498 0614 39 RTS
|
| 512 |
|
|
0499 *
|
| 513 |
|
|
0500 * Checksum Error detected ...
|
| 514 |
|
|
0501 * Reset Sector counter in ACCB to last 128 byte boundary
|
| 515 |
|
|
0502 * and send NAK
|
| 516 |
|
|
0503 *
|
| 517 |
|
|
0504 0615 34 04 XSTCK1 PSHS B
|
| 518 |
|
|
0505 0617 1F 10 TFR X,D
|
| 519 |
|
|
0506 0619 5A DECB
|
| 520 |
|
|
0507 061A C4 80 ANDB #128
|
| 521 |
|
|
0508 061C 1F 01 TFR D,X
|
| 522 |
|
|
0509 061E 35 04 PULS B
|
| 523 |
|
|
0510 0620 86 15 LDA #NAK
|
| 524 |
|
|
0511 0622 17 FD 8C XSTCK2 LBSR OUTTER
|
| 525 |
|
|
0512 0625 CE 05 A4 LDU #XSTST
|
| 526 |
|
|
0513 0628 1C FA ANDCC #$FF-CFLAG-ZFLAG No abort, no valid data (no exit)
|
| 527 |
|
|
0514 062A 39 RTS
|
| 528 |
|
|
0515 *
|
| 529 |
|
|
0516 * Acknowledge Data Received
|
| 530 |
|
|
0517 *
|
| 531 |
|
|
0518 062B 34 02 XACK PSHS A
|
| 532 |
|
|
0519 062D 86 06 LDA #ACK
|
| 533 |
|
|
0520 062F 17 FD 7F LBSR OUTTER
|
| 534 |
|
|
0521 0632 35 82 PULS A,PC
|
| 535 |
|
|
0522 *
|
| 536 |
|
|
0523 *
|
| 537 |
|
|
0524 ** FLEX 9 IDE DISK DRIVERS
|
| 538 |
|
|
0525 *
|
| 539 |
|
|
0526 * FOR SYS09BUG 1.2 ON THE XSA-3S1000
|
| 540 |
|
|
0527 * WITH I/O MAPPED AT $XE000
|
| 541 |
|
|
0528 * AND ROM MAPPED AT $XF000
|
| 542 |
|
|
0529 *
|
| 543 |
|
|
0530 *
|
| 544 |
|
|
0531 0010 IMASK EQU $10 IRQ MASK CC
|
| 545 |
|
|
0532 0040 FMASK EQU $40 FIRQ MASK CC
|
| 546 |
|
|
0533 *
|
| 547 |
|
|
0534 E100 CF_BASE EQU $E100
|
| 548 |
|
|
0535 E100 CF_DATA EQU CF_BASE+0
|
| 549 |
|
|
0536 E102 CF_ERROR EQU CF_BASE+2 ; read error
|
| 550 |
|
|
0537 E102 CF_FEATURE EQU CF_BASE+2 ; write feature
|
| 551 |
|
|
0538 E104 CF_SCNT EQU CF_BASE+4
|
| 552 |
|
|
0539 E106 CF_SNUM EQU CF_BASE+6
|
| 553 |
|
|
0540 E108 CF_CLO EQU CF_BASE+8
|
| 554 |
|
|
0541 E10A CF_CHI EQU CF_BASE+10
|
| 555 |
|
|
0542 E10C CF_HEAD EQU CF_BASE+12
|
| 556 |
|
|
0543 E10E CF_STATUS EQU CF_BASE+14 ; read status
|
| 557 |
|
|
0544 E10E CF_COMAND EQU CF_BASE+14 ; write command
|
| 558 |
|
|
0545 E11E CF_AUX EQU CF_BASE+30
|
| 559 |
|
|
0546 *
|
| 560 |
|
|
0547 * Command Equates
|
| 561 |
|
|
0548 *
|
| 562 |
|
|
0549 0020 CMDREAD EQU $20 ; Read Single sector
|
| 563 |
|
|
0550 0030 CMDWRITE EQU $30 ; Write Single sector
|
| 564 |
|
|
0551 0006 AUXRESET EQU $06
|
| 565 |
|
|
0552 0002 AUXRSTREL EQU $02
|
| 566 |
|
|
0553 00E0 HEADLBA EQU $E0
|
| 567 |
|
|
0554 *
|
| 568 |
|
|
0555 * Status bit equates
|
| 569 |
|
|
0556 *
|
| 570 |
|
|
0557 0080 BSY EQU $80
|
| 571 |
|
|
0558 0040 DRDY EQU $40
|
| 572 |
|
|
0559 0008 DRQ EQU $08
|
| 573 |
|
|
0560 0001 ERR EQU $01
|
| 574 |
|
|
0561 *
|
| 575 |
|
|
0562 *
|
| 576 |
|
|
0563 * INITIALIZE CF CARD FOR 8 BIT LBA MODE
|
| 577 |
|
|
0564 *
|
| 578 |
|
|
0565 0634 CC 00 06 INITDR LDD #AUXRESET
|
| 579 |
|
|
0566 0637 FD E1 1E STD CF_AUX
|
| 580 |
|
|
0567 063A CC 00 02 LDD #AUXRSTREL
|
| 581 |
|
|
0568 063D FD E1 1E STD CF_AUX
|
| 582 |
|
|
0569 0640 CC 00 E0 LDD #HEADLBA
|
| 583 |
|
|
0570 0643 FD E1 0C STD CF_HEAD
|
| 584 |
|
|
0571 0646 20 74 BRA WAITRDY
|
| 585 |
|
|
0572 *
|
| 586 |
|
|
0573 * RESTORE DISK DRIVER (SEEK TRACK 00)
|
| 587 |
|
|
0574 *
|
| 588 |
|
|
0575 0648 8D 62 RESTR1 BSR DRVSEL
|
| 589 |
|
|
0576 064A 4F CLRA ; Track 0
|
| 590 |
|
|
0577 064B C6 01 LDB #$01 ; Sector 1
|
| 591 |
|
|
0578 *
|
| 592 |
|
|
0579 * Seek track and sector
|
| 593 |
|
|
0580 * A holds track number (0 - ??)
|
| 594 |
|
|
0581 * B holds sector number (1 - ??)
|
| 595 |
|
|
0582 * Sector numbers starts from 1
|
| 596 |
|
|
0583 * subtract 1 to start from sector 0 on CF
|
| 597 |
|
|
0584 *
|
| 598 |
|
|
0585 064D 34 02 SEEKTS PSHS A
|
| 599 |
|
|
0586 064F 4F CLRA
|
| 600 |
|
|
0587 0650 5A DECB
|
| 601 |
|
|
0588 0651 FD E1 06 STD CF_SNUM
|
| 602 |
|
|
0589 0654 E6 E4 LDB ,S
|
| 603 |
|
|
0590 0656 FD E1 08 STD CF_CLO
|
| 604 |
|
|
0591 0659 F6 01 07 LDB DRVNUM
|
| 605 |
|
|
0592 065C FD E1 0A STD CF_CHI
|
| 606 |
|
|
0593 065F C6 01 LDB #$01
|
| 607 |
|
|
0594 0661 FD E1 04 STD CF_SCNT
|
| 608 |
|
|
0595 0664 5F CLRB
|
| 609 |
|
|
0596 0665 35 82 PULS A,PC
|
| 610 |
|
|
0597 *
|
| 611 |
|
|
0598 * READ SECTORS FROM CF
|
| 612 |
|
|
0599 *
|
| 613 |
|
|
0600 *
|
| 614 |
|
|
0601 0667 8D E4 READSC BSR SEEKTS
|
| 615 |
|
|
0602 0669 CC 00 20 LDD #CMDREAD ; IDE READ MULTIPLE
|
| 616 |
|
|
0603 066C FD E1 0E STD CF_COMAND
|
| 617 |
|
|
0604 066F 8D 4B BSR WAITRDY
|
| 618 |
|
|
0605 *
|
| 619 |
|
|
0606 * READ LOOP
|
| 620 |
|
|
0607 *
|
| 621 |
|
|
0608 0671 34 20 PSHS Y
|
| 622 |
|
|
0609 0673 10 8E 01 00 LDY #256
|
| 623 |
|
|
0610 0677 8D 52 RDLP1 BSR WAITDRQ
|
| 624 |
|
|
0611 0679 FC E1 00 LDD CF_DATA
|
| 625 |
|
|
0612 067C E7 80 STB ,X+
|
| 626 |
|
|
0613 067E 31 3F LEAY -1,Y
|
| 627 |
|
|
0614 0680 26 F5 BNE RDLP1
|
| 628 |
|
|
0615 0682 35 20 PULS Y
|
| 629 |
|
|
0616 *
|
| 630 |
|
|
0617 0684 8D 36 BSR WAITRDY
|
| 631 |
|
|
0618 0686 5F CLRB
|
| 632 |
|
|
0619 0687 39 RTS
|
| 633 |
|
|
0620 *
|
| 634 |
|
|
0621 * WRITE SECTOR TO CF
|
| 635 |
|
|
0622 *
|
| 636 |
|
|
0623 0688 8D C3 WRITSC BSR SEEKTS ; SEEK TRACK & SECTOR
|
| 637 |
|
|
0624 068A CC 00 30 LDD #CMDWRITE ; IDE WRITE MULTIPLE
|
| 638 |
|
|
0625 068D FD E1 0E STD CF_COMAND
|
| 639 |
|
|
0626 0690 8D 2A BSR WAITRDY
|
| 640 |
|
|
0627 *
|
| 641 |
|
|
0628 * WRITE LOOP
|
| 642 |
|
|
0629 *
|
| 643 |
|
|
0630 0692 34 20 PSHS Y
|
| 644 |
|
|
0631 0694 10 8E 01 00 LDY #256
|
| 645 |
|
|
0632 0698 4F CLRA
|
| 646 |
|
|
0633 0699 8D 30 WRTLP1 BSR WAITDRQ
|
| 647 |
|
|
0634 069B E6 80 LDB ,X+
|
| 648 |
|
|
0635 069D FD E1 00 STD CF_DATA
|
| 649 |
|
|
0636 06A0 31 3F LEAY -1,Y
|
| 650 |
|
|
0637 06A2 26 F5 BNE WRTLP1
|
| 651 |
|
|
0638 06A4 35 20 PULS Y
|
| 652 |
|
|
0639 *
|
| 653 |
|
|
0640 06A6 8D 14 BSR WAITRDY
|
| 654 |
|
|
0641 06A8 5F CLRB
|
| 655 |
|
|
0642 06A9 39 RTS
|
| 656 |
|
|
0643 *
|
| 657 |
|
|
0644 * CHECK FOR BUSY
|
| 658 |
|
|
0645 * Doubles as VERIFY
|
| 659 |
|
|
0646 *
|
| 660 |
|
|
0647 06AA 5F BUSY CLRB Never busy
|
| 661 |
|
|
0648 06AB 39 RTS
|
| 662 |
|
|
0649 *
|
| 663 |
|
|
0650 * DRIVE SELECT DISK DRIVER
|
| 664 |
|
|
0651 *
|
| 665 |
|
|
0652 06AC A6 03 DRVSEL LDA 3,X GET DRIVE # FROM FCB
|
| 666 |
|
|
0653 06AE 81 03 CMPA #3
|
| 667 |
|
|
0654 06B0 23 01 BLS DRVS2 IF > 3, SET IT TO 0
|
| 668 |
|
|
0655 06B2 4F CLRA
|
| 669 |
|
|
0656 06B3 B7 01 07 DRVS2 STA DRVNUM
|
| 670 |
|
|
0657 06B6 5F CLRB ; SET Z, CLEAR C
|
| 671 |
|
|
0658 06B7 39 RTS
|
| 672 |
|
|
0659 *
|
| 673 |
|
|
0660 * CHECK DRIVE READY DISK DRIVER
|
| 674 |
|
|
0661 *
|
| 675 |
|
|
0662 06B8 A6 03 CHKDRV LDA 3,X
|
| 676 |
|
|
0663 06BA 5F CLRB ; CLEAR C, SET Z
|
| 677 |
|
|
0664 06BB 39 RTS
|
| 678 |
|
|
0665 *
|
| 679 |
|
|
0666 * WAIT UNTIL READY
|
| 680 |
|
|
0667 *
|
| 681 |
|
|
0668 06BC FC E1 0E WAITRDY LDD CF_STATUS
|
| 682 |
|
|
0669 06BF C5 80 BITB #BSY
|
| 683 |
|
|
0670 06C1 26 F9 BNE WAITRDY
|
| 684 |
|
|
0671 06C3 FC E1 0E LDD CF_STATUS
|
| 685 |
|
|
0672 06C6 C5 40 BITB #DRDY
|
| 686 |
|
|
0673 06C8 27 F2 BEQ WAITRDY
|
| 687 |
|
|
0674 06CA 39 RTS
|
| 688 |
|
|
0675 *
|
| 689 |
|
|
0676 * WAIT FOR DATA REQUEST
|
| 690 |
|
|
0677 *
|
| 691 |
|
|
0678 06CB FC E1 0E WAITDRQ LDD CF_STATUS
|
| 692 |
|
|
0679 06CE C5 08 BITB #DRQ
|
| 693 |
|
|
0680 06D0 27 F9 BEQ WAITDRQ
|
| 694 |
|
|
0681 06D2 39 RTS
|
| 695 |
|
|
0682 *
|
| 696 |
|
|
0683 *******************************************************
|
| 697 |
|
|
0684 *
|
| 698 |
|
|
0685 * Bootstrap FLEX Loader
|
| 699 |
|
|
0686 *
|
| 700 |
|
|
0687 * SBUG1.8 loads the bootstap loader at $C000
|
| 701 |
|
|
0688 * however the Flex adaption manual has the
|
| 702 |
|
|
0689 * bootstrap loader residing at $C100
|
| 703 |
|
|
0690 *
|
| 704 |
|
|
0691 ******************************************************
|
| 705 |
|
|
0692 *
|
| 706 |
|
|
0693 * Equates
|
| 707 |
|
|
0694 *
|
| 708 |
|
|
0695 C0FF STACK EQU $C0FF
|
| 709 |
|
|
0696 C300 SCTBUF EQU $C300
|
| 710 |
|
|
0697 *
|
| 711 |
|
|
0698 * Start of Utility
|
| 712 |
|
|
0699 *
|
| 713 |
|
|
0700 C000 ORG $C000
|
| 714 |
|
|
0701 C000 20 0B BOOT BRA LOAD0
|
| 715 |
|
|
0702 C002 00 00 00 FCB 0,0,0
|
| 716 |
|
|
0703 C005 00 TRK FCB 0 File start track
|
| 717 |
|
|
0704 C006 00 SCT FCB 0 File start sector
|
| 718 |
|
|
0705 C007 00 DNS FCB 0 Density Flag (not used)
|
| 719 |
|
|
0706 C008 C0 00 TADR FDB $C000 Transfer address
|
| 720 |
|
|
0707 C00A 00 00 LADR FDB 0 Load Address
|
| 721 |
|
|
0708 C00C 00 DRNUM FCB 0 Drive number 0
|
| 722 |
|
|
0709 *
|
| 723 |
|
|
0710 C00D 10 CE C0 FF LOAD0 LDS #STACK Set up stack
|
| 724 |
|
|
0711 C011 FC C0 05 LDD TRK Set up start track and sector
|
| 725 |
|
|
0712 C014 FD C3 00 STD SCTBUF
|
| 726 |
|
|
0713 C017 10 8E C4 00 LDY #SCTBUF+256
|
| 727 |
|
|
0714 *
|
| 728 |
|
|
0715 * Perform actual file load
|
| 729 |
|
|
0716 *
|
| 730 |
|
|
0717 C01B 8D 35 LOAD1 BSR GETCH Get acharcater
|
| 731 |
|
|
0718 C01D 81 02 CMPA #$02 Data record hearder ?
|
| 732 |
|
|
0719 C01F 27 10 BEQ LOAD2 Skip, is so
|
| 733 |
|
|
0720 C021 81 16 CMPA #$16 Xfr address hearder ?
|
| 734 |
|
|
0721 C023 26 F6 BNE LOAD1 Loop if neither
|
| 735 |
|
|
0722 *
|
| 736 |
|
|
0723 * Get transfer address
|
| 737 |
|
|
0724 *
|
| 738 |
|
|
0725 C025 8D 2B BSR GETCH
|
| 739 |
|
|
0726 C027 B7 C0 08 STA TADR
|
| 740 |
|
|
0727 C02A 8D 26 BSR GETCH
|
| 741 |
|
|
0728 C02C B7 C0 09 STA TADR+1
|
| 742 |
|
|
0729 C02F 20 EA BRA LOAD1
|
| 743 |
|
|
0730 *
|
| 744 |
|
|
0731 * Load data record
|
| 745 |
|
|
0732 *
|
| 746 |
|
|
0733 C031 8D 1F LOAD2 BSR GETCH Get load address
|
| 747 |
|
|
0734 C033 B7 C0 0A STA LADR
|
| 748 |
|
|
0735 C036 8D 1A BSR GETCH
|
| 749 |
|
|
0736 C038 B7 C0 0B STA LADR+1
|
| 750 |
|
|
0737 C03B 8D 15 BSR GETCH Get Bytes count
|
| 751 |
|
|
0738 C03D 1F 89 TFR A,B
|
| 752 |
|
|
0739 C03F 5D TSTB
|
| 753 |
|
|
0740 C040 27 D9 BEQ LOAD1 Loop if count = 0
|
| 754 |
|
|
0741 C042 BE C0 0A LDX LADR Get load address
|
| 755 |
|
|
0742 C045 34 14 LOAD3 PSHS B,X
|
| 756 |
|
|
0743 C047 8D 09 BSR GETCH Get data character
|
| 757 |
|
|
0744 C049 35 14 PULS B,X
|
| 758 |
|
|
0745 C04B A7 80 STA ,X+ Store at load address
|
| 759 |
|
|
0746 C04D 5A DECB
|
| 760 |
|
|
0747 C04E 26 F5 BNE LOAD3 Loop until count = 0
|
| 761 |
|
|
0748 C050 20 C9 BRA LOAD1
|
| 762 |
|
|
0749 *
|
| 763 |
|
|
0750 * Get Character routine
|
| 764 |
|
|
0751 * Reads a sector if needed
|
| 765 |
|
|
0752 *
|
| 766 |
|
|
0753 C052 10 8C C4 00 GETCH CMPY #SCTBUF+256 out of data ?
|
| 767 |
|
|
0754 C056 26 0F BNE GETCH4 Go read Character if not
|
| 768 |
|
|
0755 C058 8E C3 00 GETCH2 LDX #SCTBUF Point to buffer
|
| 769 |
|
|
0756 C05B EC 84 LDD 0,X Get forward Link
|
| 770 |
|
|
0757 C05D 27 0B BEQ GO if zero, file is loaded
|
| 771 |
|
|
0758 C05F 8D 27 BSR READ Read next sector
|
| 772 |
|
|
0759 C061 26 9D BNE BOOT start over if error
|
| 773 |
|
|
0760 C063 10 8E C3 04 LDY #SCTBUF+4 Point past link
|
| 774 |
|
|
0761 C067 A6 A0 GETCH4 LDA ,Y+ Else, get a character
|
| 775 |
|
|
0762 C069 39 RTS
|
| 776 |
|
|
0763 *
|
| 777 |
|
|
0764 * File is loaded, Jump to it
|
| 778 |
|
|
0765 *
|
| 779 |
|
|
0766 C06A 6E 9F C0 08 GO JMP [TADR] Jump to transfer address
|
| 780 |
|
|
0767
|
| 781 |
|
|
0768 *
|
| 782 |
|
|
0769 ** FLEX 9 IDE DISK DRIVERS
|
| 783 |
|
|
0770 *
|
| 784 |
|
|
0771 * FOR SYS09BUG 1.2 ON THE XSA-3S1000
|
| 785 |
|
|
0772 * WITH I/O MAPPED AT $XE000
|
| 786 |
|
|
0773 * AND ROM MAPPED AT $XF000
|
| 787 |
|
|
0774 *
|
| 788 |
|
|
0775 *IMASK EQU $10 IRQ MASK CC
|
| 789 |
|
|
0776 *FMASK EQU $40 FIRQ MASK CC
|
| 790 |
|
|
0777 *
|
| 791 |
|
|
0778 *CF_BASE EQU $E100
|
| 792 |
|
|
0779 *CF_DATA EQU CF_BASE+0
|
| 793 |
|
|
0780 *CF_ERROR EQU CF_BASE+2 ; read error
|
| 794 |
|
|
0781 *CF_FEATURE EQU CF_BASE+2 ; write feature
|
| 795 |
|
|
0782 *CF_SCNT EQU CF_BASE+4
|
| 796 |
|
|
0783 *CF_SNUM EQU CF_BASE+6
|
| 797 |
|
|
0784 *CF_CLO EQU CF_BASE+8
|
| 798 |
|
|
0785 *CF_CHI EQU CF_BASE+10
|
| 799 |
|
|
0786 *CF_HEAD EQU CF_BASE+12
|
| 800 |
|
|
0787 *CF_STATUS EQU CF_BASE+14 ; read status
|
| 801 |
|
|
0788 *CF_COMAND EQU CF_BASE+14 ; write command
|
| 802 |
|
|
0789 *CF_AUX EQU CF_BASE+30
|
| 803 |
|
|
0790 *
|
| 804 |
|
|
0791 * Command Equates
|
| 805 |
|
|
0792 *
|
| 806 |
|
|
0793 *CMDREAD EQU $20 ; Read Single sector
|
| 807 |
|
|
0794 *CMDWRITE EQU $30 ; Write Single sector
|
| 808 |
|
|
0795 *HEADLBA EQU $E0
|
| 809 |
|
|
0796 *AUXRESET EQU $06
|
| 810 |
|
|
0797 *AUXRSTREL EQU $02
|
| 811 |
|
|
0798 *
|
| 812 |
|
|
0799 * Status bit equates
|
| 813 |
|
|
0800 *
|
| 814 |
|
|
0801 *BSY EQU $80
|
| 815 |
|
|
0802 *DRDY EQU $40
|
| 816 |
|
|
0803 *DRQ EQU $08
|
| 817 |
|
|
0804 *ERR EQU $01
|
| 818 |
|
|
0805 *
|
| 819 |
|
|
0806 * Seek track and sector
|
| 820 |
|
|
0807 * A holds track number (0 - ??)
|
| 821 |
|
|
0808 * B holds sector number (1 - ??)
|
| 822 |
|
|
0809 * Sector numbers starts from 1
|
| 823 |
|
|
0810 * subtract 1 to start from sector 0 on CF
|
| 824 |
|
|
0811 *
|
| 825 |
|
|
0812 C06E 34 02 SEEK PSHS A
|
| 826 |
|
|
0813 C070 4F CLRA
|
| 827 |
|
|
0814 C071 5A DECB
|
| 828 |
|
|
0815 C072 FD E1 06 STD CF_SNUM
|
| 829 |
|
|
0816 C075 E6 E4 LDB ,S
|
| 830 |
|
|
0817 C077 FD E1 08 STD CF_CLO
|
| 831 |
|
|
0818 C07A F6 C0 0C LDB DRNUM
|
| 832 |
|
|
0819 C07D FD E1 0A STD CF_CHI
|
| 833 |
|
|
0820 C080 C6 01 LDB #$01
|
| 834 |
|
|
0821 C082 FD E1 04 STD CF_SCNT
|
| 835 |
|
|
0822 C085 5F CLRB
|
| 836 |
|
|
0823 C086 35 82 PULS A,PC
|
| 837 |
|
|
0824 *
|
| 838 |
|
|
0825 * READ SECTORS FROM CF
|
| 839 |
|
|
0826 *
|
| 840 |
|
|
0827 *
|
| 841 |
|
|
0828 C088 8D E4 READ BSR SEEK
|
| 842 |
|
|
0829 C08A CC 00 20 LDD #CMDREAD ; IDE READ MULTIPLE
|
| 843 |
|
|
0830 C08D FD E1 0E STD CF_COMAND
|
| 844 |
|
|
0831 C090 8D 17 BSR WTRDY
|
| 845 |
|
|
0832 *
|
| 846 |
|
|
0833 * READ LOOP
|
| 847 |
|
|
0834 *
|
| 848 |
|
|
0835 C092 34 20 PSHS Y
|
| 849 |
|
|
0836 C094 10 8E 01 00 LDY #256
|
| 850 |
|
|
0837 C098 8D 1E READ1 BSR WTDRQ
|
| 851 |
|
|
0838 C09A FC E1 00 LDD CF_DATA
|
| 852 |
|
|
0839 C09D E7 80 STB ,X+
|
| 853 |
|
|
0840 C09F 31 3F LEAY -1,Y
|
| 854 |
|
|
0841 C0A1 26 F5 BNE READ1
|
| 855 |
|
|
0842 C0A3 35 20 PULS Y
|
| 856 |
|
|
0843 *
|
| 857 |
|
|
0844 C0A5 8D 02 BSR WTRDY
|
| 858 |
|
|
0845 C0A7 5F CLRB
|
| 859 |
|
|
0846 C0A8 39 RTS
|
| 860 |
|
|
0847 *
|
| 861 |
|
|
0848 * WAIT UNTIL READY
|
| 862 |
|
|
0849 *
|
| 863 |
|
|
0850 C0A9 FC E1 0E WTRDY LDD CF_STATUS
|
| 864 |
|
|
0851 C0AC C5 80 BITB #BSY
|
| 865 |
|
|
0852 C0AE 26 F9 BNE WTRDY
|
| 866 |
|
|
0853 C0B0 FC E1 0E LDD CF_STATUS
|
| 867 |
|
|
0854 C0B3 C5 40 BITB #DRDY
|
| 868 |
|
|
0855 C0B5 27 F2 BEQ WTRDY
|
| 869 |
|
|
0856 C0B7 39 RTS
|
| 870 |
|
|
0857 *
|
| 871 |
|
|
0858 * WAIT FOR DATA REQUEST
|
| 872 |
|
|
0859 *
|
| 873 |
|
|
0860 C0B8 FC E1 0E WTDRQ LDD CF_STATUS
|
| 874 |
|
|
0861 C0BB C5 08 BITB #DRQ
|
| 875 |
|
|
0862 C0BD 27 F9 BEQ WTDRQ
|
| 876 |
|
|
0863 C0BF 39 RTS
|
| 877 |
|
|
0864 *
|
| 878 |
|
|
0865 END START
|
| 879 |
|
|
Program + Init Data = 1191 bytes
|
| 880 |
|
|
Error count = 0
|
