625 lines
15 KiB
ArmAsm
625 lines
15 KiB
ArmAsm
*
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* Disk-o-Tape
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* (c) 1980, Dann McCreary
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*
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TYP BIN
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ORG $005100
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MX %11
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*-----------------------------------
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CSWL = $36
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CSWH = $37
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A1L = $3C
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A1H = $3D
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KBD = $C000
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KBDSTROBE = $C010
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PRBL2 = $F94A
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HOME = $FC58
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WAIT = $FCA8
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RDCHAR = $FD35
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GETLN = $FD6A
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CROUT = $FD8E
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PRBYTE = $FDDA
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COUT = $FDED
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COUT1 = $FDF0
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WRITE = $FECD
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READ = $FEFD
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BELL = $FF3A
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L1000 = $1000
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L5000 = $5000 ; Where the VTOC is loaded
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*-----------------------------------
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L5100 JMP L510A ; read entry point
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LDY $8034 ; write entry point
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LDA #$02
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BNE L510C
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L510A LDA #$01 ; Read command
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L510C PHA
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LDX #$14 ; copy default IOB table
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L510F LDA IOB_DFT,X
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STA IOB,X
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DEX
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BNE L510F
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PLA
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STA IOB_COMMAND
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JSR resetCOUT
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JSR HOME
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LDA IOB_COMMAND
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LSR
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BNE L5131 ; go write
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JSR L54E1 ; go read
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JSR CROUT
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JMP L514D
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L5131 LDY #$0A ; COPY TAPE -> DISK
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JSR PRINTSTRING
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JSR CROUT
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LDY #$25 ; wait
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L513B LDA #$FF
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JSR WAIT
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DEY
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BNE L513B
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LDY #$1A ; DISK NAME
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JSR PRINTSTRING
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LDY #$1E ; :
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JSR PRINTSTRING
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L514D LDY #$1C ; The disk name
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JSR PRINTSTRING
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JSR L52AA ; handle VTOC
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LDA #$01
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STA L55FB
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JSR CROUT
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LDY #$0C ; TK/SC
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JSR PRINTSTRING
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L5162 JSR L51D8 ; read/write buffer
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JSR L51A5 ; write/read it
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LDA IOB_TRACK ; are we done?
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BMI L5175
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CLC
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ADC IOB_SECTOR
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CMP #$00
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BNE L5162
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L5175 LDA IOB_COMMAND
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LSR
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BNE L517E ; go write
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JMP L554E ; go verify/read
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L517E JSR CROUT
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LDY #$08 ; COPY DONE
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L5183 JSR CROUT
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JSR PRINTSTRING
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JSR L518F ; wait for key
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JMP $03D0 ; return to DOS
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L518F BIT KBDSTROBE
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L5192 LDY #$07
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L5194 LDA #$FF
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JSR WAIT
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DEY
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BNE L5194
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JSR BELL
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LDA KBD
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BPL L5192
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RTS
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*----------
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L51A5 LDA IOB_COMMAND
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LSR
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BNE L51DE ; go write
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L51AB LDY #$00
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*-----------------------------------
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doTAPECMD LDX #$03 ; move tape parms to A1/A2
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L51AF LDA L52FC,Y
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STA A1L,X
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INY
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DEX
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BPL L51AF
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LDA IOB_COMMAND ; either read from or write to tape
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AND #$01
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BNE L51D5
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JSR setCOUT ; modify COUT
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JSR READ ; read from tape
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PHP
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JSR resetCOUT ; reset COUT
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PLP
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BEQ L51D4
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JSR CROUT
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LDY #$18 ; TAPE READ ERROR
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JMP L52A2
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L51D4 RTS
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L51D5 JMP WRITE ; write to tape
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*-----------------------------------
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L51D8 LDA IOB_COMMAND
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LSR
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BNE L51AB ; go write
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L51DE LDA #>L1000 ; set buffer at $1000
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STA IOB_BUFFER+1
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STA A1H
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LDA #<L1000
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STA IOB_BUFFER
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STA A1L
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LDA IOB_COMMAND ; command?
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LSR
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BNE L5206
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*-- Read
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LDA #$20 ; read means clear $1000..$2FFF
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STA nbPAGES
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LDY #$00
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TYA
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L51FA STA (A1L),Y
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INY
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BNE L51FA
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INC A1H
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DEC nbPAGES ; page--
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BNE L51FA
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*-- Write means do not erase buffer
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L5206 LDA #$20
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STA nbPAGES
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LDA L55FB ; check pass
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BEQ L5215
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DEC L55FB ; tell we've been there
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BEQ L522F ; handle first case
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L5215 JSR L52D5 ; get sector usage
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LDA IOB_TRACK
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SEC
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SBC #$00
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BPL L522F
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STA IOB_TRACK
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LDY nbPAGES ; wait again
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L5226 LDA #$D7
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JSR WAIT
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DEY
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BNE L5226
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RTS
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L522F JSR GO_RWTS
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LDA IOB_TRACK ; show T
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JSR PRBYTE
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LDX #$01
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JSR PRBL2
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LDA IOB_SECTOR ; show S
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JSR PRBYTE
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LDA #$00
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STA $24
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INC IOB_BUFFER+1
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DEC nbPAGES ; nb pages
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BNE L5215
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RTS
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*---------- Redirect COUT vector
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setCOUT LDA #<L5262
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STA CSWL
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LDA #>L5262
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STA CSWH
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RTS
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*---------- Reset COUT vector
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resetCOUT LDA #<COUT1
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STA CSWL
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LDA #>COUT1
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STA CSWH
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RTS
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*---------- My COUT routine
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L5262 CMP #$87
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BEQ L526A
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PLA
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PLA
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LDA #$FF
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L526A RTS
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*-----------------------------------
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PRINTSTRING LDA L5329,Y ; PRINT STRING
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STA $01
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LDA L532A,Y
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STA $00
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LDY #$FF
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L5277 INY
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LDA ($00),Y
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ORA #$80
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JSR COUT
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LDA ($00),Y
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BMI L5277
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RTS
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*-----------------------------------
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GO_RWTS LDA #>IOB ; execute a RWTS call
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LDY #<IOB
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JSR $03D9
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BCC L5290
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JSR L5291
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L5290 RTS
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*---------- Handle error
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L5291 LDA IOB_ERRCODE
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LDY #$0E ; DISK WRITE PROTECTED
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CMP #$10 ;
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BEQ L52A2
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LDY #$10 ; DISK READ ERROR
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CMP #$80 ;
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BEQ L52A2
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LDY #$12 ; DISK DRIVE ERROR
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L52A2 JSR PRINTSTRING
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LDY #$16 ; COPY ABORT
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JMP L5183
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*-----------------------------------
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* See the DOS 3.3 manual, page 132
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L52AA LDA #$23 ; last track
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NOP
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STA IOB_TRACK
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ASL ; *2
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ASL ; *4
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CLC
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ADC #$38 ; C4
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STA L55F9
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L52B8 LDA #$00
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STA L55F8
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LDA L55F9 ; C4 - 4 = C0 => T22 bitmap
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SEC
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SBC #$04
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TAX
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STX L55F9
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STX L55FA
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DEC IOB_TRACK
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BMI L52FB
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LDA #$10 ; last sector
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NOP
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STA IOB_SECTOR
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*---------- The VTOC is at $5000
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* Bitmap starts at $5038
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* Each bit set means a free sector
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* Byte 1 Byte 2
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* Bit 76543210 76543210
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* Sector FEDCBA98 76543210
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L52D5 LDX L55FA ; index within T22..
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DEC IOB_SECTOR
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BMI L52B8 ; next track please
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L52DD CLC ; return bit sector usage within bitmap
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LDA L55F8
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BNE L52E4
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SEC
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L52E4 ROR
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BNE L52EB
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INX
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STX L55FA
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L52EB STA L55F8
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LDA L55F8
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BEQ L52DD
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AND $5000,X ; The VTOC lies at $5000
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NOP
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NOP
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STX L55FA
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L52FB RTS
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*---------- Read/Write Tape commands
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* Put at A1/A2 ($3C..$3F): FROM..TO
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* Code puts it inverted
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L52FC DB $2F ; 0 1000..2FFF
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DB $FF
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DB $10
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DB $00
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DB $4F ; 4 3000..4FFF
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DB $FF
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DB $30
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DB $00
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DB $54 ; 8 5000..5460
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DB $60
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DB $50
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DB $00
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DB $34 ; C 3000..3460
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DB $60
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DB $30
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DB $00
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DB $54 ; 10 53FE..543E
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DB $3E
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DB $53
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DB $FE
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DB $30 ; 14 3000..3040
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DB $40
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DB $30
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DB $00
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*---------- Default IOB table
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IOB_DFT DB $01
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DB $60
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DB $01
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DB $00
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DB $00
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DB $00
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DA $54DD
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DA $1000
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DB $00
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DB $00
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DB $00
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DB $00
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DB $00
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DB $60
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DB $01
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DB $00
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DB $01
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DB $EF
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DB $D8
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*---------- Pointers to strings (all inverted...)
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L5329 DB >L53C3 ; 0 DISK-O-TAPE/PASCAL
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L532A DB <L53C3
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DB >L543C ; 2 PLEASE INSERT DISK TO BE COPIED
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DB <L543C
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DB >L5418 ; 4 COPYRIGHT
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DB <L5418
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DB >L5498 ; 6 PLEASE REWIND TAPE...
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DB <L5498
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DB >L536A ; 8 COPY DONE
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DB <L536A
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DB >L5374 ; A COPY TAPE -> DISK
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DB <L5374
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DB >L5386 ; C TK/SC
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DB <L5386
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DB >L538C ; E DISK WRITE PROTECTED
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DB <L538C
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DB >L53A1 ; 10 DISK READ ERROR
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DB <L53A1
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DB >L53B1 ; 12 DISK DRIVE ERROR
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DB <L53B1
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DB >L545C ; 14 COPY DISK -> TAPE
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DB <L545C
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DB >L534F ; 16 COPY ABORT
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DB <L534F
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DB >L535A ; 18 TAPE READ ERROR
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DB <L535A
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DB >L53D6 ; 1A DISK NAME
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DB <L53D6
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DB >L53DF ; 1C " "
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DB <L53DF
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DB >L53C2 ; 1E :
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DB <L53C2
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DB >L546E ; 20 ERROR DURING
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DB <L546E
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DB >L547B ; 22 TAPE VERIFY
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DB <L547B
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DB >L5488 ; 24 VERIFY COMPLETE
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DB >L5488
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L534F ASC "COPY ABORT"0D
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L535A ASC "TAPE READ ERROR"0D
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L536A ASC "COPY DONE"0D
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L5374 ASC "COPY TAPE -> DISK"0D
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L5386 ASC "TK/SC"0D
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L538C ASC "DISK WRITE PROTECTED"0D
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L53A1 ASC "DISK READ ERROR"0D
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L53B1 ASC "DISK DRIVE ERROR"0D
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L53C2 ASC ':'
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L53C3 ASC "DISK-O-TAPE/PASCAL"0D
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L53D6 ASC "DISK NAM"
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ASC 'E'
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L53DF ASC " "
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L53E0 ASC "SPACE RESERVED FOR DISK NAME "0D
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L53FE ASC "200.240R 5000.5460R 5103G"8D
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L5418 ASC "COPYRIGHT (C) 1980 BY DANN MCCREARY"0D
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L543C ASC "PLEASE INSERT DISK TO BE COPIED"0D
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L545C ASC "COPY DISK -> TAPE"0D
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L546E ASC "ERROR DURING "
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L547B ASC "TAPE VERIFY"8D0D
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L5488 ASC "VERIFY COMPLETE"0D
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L5498 ASC "PLEASE REWIND TAPE, START"8D
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ASC "RECORDER AND PRESS RETURN"0D
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*-----------------------------------
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IOB DB $01 ; 0 IOB type
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DB $60 ; 1 Slot number * 16
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DB $01 ; 2 Disk drive
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DB $00 ; 3 Expected volume number
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IOB_TRACK DB $00 ; 4 Track
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IOB_SECTOR DB $00 ; 5 Sector
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DA L54DD
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IOB_BUFFER DA $1000 ; 8 Buffer
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DB $00
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DB $00
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IOB_COMMAND DB $00 ; Command
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IOB_ERRCODE DB $00 ; Error code
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DB $00
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DB $60
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DB $01
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L54DD DB $00 ; DCT
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DB $01
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DB $EF
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DB $D8
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*-----------------------------------
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MX %11
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L54E1 LDY #$00 ; DISK-O-TAPE PASCAL
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JSR PRINTSTRING
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LDY #$04 ; COPYRIGHT
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JSR PRINTSTRING
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JSR CROUT
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LDY #$02 ; PLEASE INSERT DISK TO BE COPIED
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JSR PRINTSTRING
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JSR CROUT
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LDY #$1A ; DISK NAME
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JSR PRINTSTRING
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LDA #$BF ; cursor
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STA |$0033
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JSR GETLN
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CPX #$1D ; length of string
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BCC L5509
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LDX #$1D ; put a final CR
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L5509 LDA #$0D
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STA L53E0,X
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L550E LDA $0200,X ; copy disk name
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STA L53DF,X
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DEX
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BPL L550E
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JSR CROUT
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LDY #$06 ; PLEASE REWIND TAPE
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JSR PRINTSTRING
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JSR RDCHAR
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JSR CROUT
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LDY #$14 ; COPY DISK -> TAPE
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JSR PRINTSTRING
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LDY #$10 ; 53FE..543E -> 200.240R 5000.5460R 5103G + COPYRIGHT (C) 1980 BY DANN MCCREARY
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JSR doTAPECMD
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JSR L5537 ; read VTOC
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LDY #$08 ;
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JMP doTAPECMD
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*---------- Read (write?) VTOC
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L5537 LDA #$00
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STA IOB_SECTOR
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LDA #$11
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STA IOB_TRACK
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LDA #>L5000
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STA IOB_BUFFER+1
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LDA #<L5000
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STA IOB_BUFFER
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JMP GO_RWTS
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*----------
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L554E JSR HOME
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LDY #$22 ; TAPE VERIFY
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JSR PRINTSTRING
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LDY #$06 ; PLEASE REWIND TAPE...
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JSR PRINTSTRING
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JSR L518F
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LDA #$01 ; read
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STA IOB_COMMAND
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JSR L5537
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LDY #$14 ; 3000..3040
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JSR L55B9
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LDY #$0C ; 3000..3460
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JSR L55B9
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JSR L52AA
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LDA #$01
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STA L55FB
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JSR CROUT
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LDY #$1C ; " "
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JSR PRINTSTRING
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LDY #$0C ; TK/SC
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JSR PRINTSTRING
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L5585 LDA #$01 ; read
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STA IOB_COMMAND
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JSR L51DE
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LDY #$04 ; 3000..4FFF
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JSR L55B9
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LDA IOB_TRACK
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BMI L559F
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CLC
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ADC IOB_SECTOR
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CMP #$00
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BNE L5585
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L559F JSR CROUT
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LDY #$24 ; VERIFY COMPLETE
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JMP L5183
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L55A7 LDX #$07
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L55A9 CPX #$05
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BNE L55AF
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DEX
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DEX
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L55AF LDA L52FC,Y
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STA A1L,X
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INY
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DEX
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BPL L55A9
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RTS
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L55B9 STY L55FE
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LDA #$02 ; write
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STA IOB_COMMAND
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JSR doTAPECMD
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LDY L55FE
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DEY
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DEY
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JSR L55A7
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JSR L55E4
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LDY #$00
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JSR $FE36 ; ROM entry point VFY for verify
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PHP
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JSR resetCOUT
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PLP
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BCS L55E3
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JSR CROUT
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LDY #$20
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JMP L52A2
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L55E3 RTS
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*---------- Set my COUT vector
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L55E4 LDA #<L55ED
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STA CSWL
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LDA #>L55ED
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STA CSWH
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RTS
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*---------- My second COUT routine
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L55ED CMP #$87
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BEQ L55F5
|
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PLA
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PLA
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PLA
|
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PLA
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L55F5 CLC
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RTS
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*----------
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nbPAGES DB $00
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L55F8 DB $00
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L55F9 DB $00
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L55FA DB $00
|
|
L55FB DB $00
|
|
DB $00
|
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DB $00
|
|
L55FE DB $00
|
|
DB $51
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