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125 lines
2.5 KiB
ArmAsm
125 lines
2.5 KiB
ArmAsm
*
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* Swashbuckler
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* (c) Stephenson
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* (s) 2018, Brutal Deluxe Software
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*
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* This is FIRSTFILE
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* Launched by HELLO
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*
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mx %11
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lst off
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*----------------------------
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L03D9 = $03D9 ; call RWTS
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*----------------------------
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L0300 JSR $E746
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L0303 STX $51
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LDY $50
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L0307 TYA
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TAX
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L0309 DEX
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BNE L0309
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BIT SPKR
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EOR $51
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TAX
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L0312 DEX
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BNE L0312
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BIT SPKR
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DEY
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BNE L0307
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RTS
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*----------
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L031C DB $00 ; NB SEC
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L031D DB $10 ; T
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L031E DB $10 ; S
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L031F DB $00
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*---------- The IOB table
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L0320 DB $01
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DB $60
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DB $01
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DB $FE
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L0324 DB $10
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L0325 DB $0F
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DA L0331
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L0328 DA $1400
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DB $00
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DB $00
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L032C DB $01 ; command
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DB $D6
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DB $FE
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DB $60
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DB $01
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L0331 HEX 0001EFD8
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*----------
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L0335 LDA #>L0320 ; call RWTS
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LDY #<L0320
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JSR L03D9
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RTS
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*---------- Read one T/S
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L033D LDA #$01 ; READ
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L033F STA L032C ; ENTRY FOR WRITE
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LDA L031E ; S
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STA L0325
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LDA L031D ; T
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STA L0324
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jmp L0335
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*---------- Read a track
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L0352 LDA #$10 ; NB SEC
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STA L031C
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L0357 JSR L033D ; READ TS
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INC L031E ; S++
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INC L0328+1 ; PTR HIGH++
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DEC L031C ; NB SEC--
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BNE L0357
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RTS
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*---------- Read 2 consecutive tracks (S0/F,T++)
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L0366 STA L031D ; TRACK
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STX L0328 ; PTR LOW
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STY L0328+1 ; PTR HIGH
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LDA #$00
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STA L031E ; S=0
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JSR L0352 ; READ TRACK
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INC L031D ; T++
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LDA #$00
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STA L031E ; S=0
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jmp L0352 ; READ TRACK
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*---------- The entry point
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L0383 LDA #$07 ; ENTRY POINT
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LDX #$00 ; T7..8
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LDY #$40 ; $4000..$5FFF
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JSR L0366
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LDA HIRES
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LDA TXTPAGE2
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LDA TXTCLR
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LDA MIXCLR
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LDA #<L1000 ; $1000
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STA L0328
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STA L031E
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LDA #$04 ; T=4
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STA L031D
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LDA #>L1000
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STA L0328+1
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JSR L0352 ; READ TRACK
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JMP L1B00 ; NEXT STAGE
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*---------- End of code
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