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https://github.com/antoinevignau/source.git
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112 lines
3.3 KiB
Plaintext
112 lines
3.3 KiB
Plaintext
Boulder Dash
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T2 at $B000
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T1 at $A800
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moves head to T0
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jumps to $A806
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0800.1FFF program code
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2000.3FFF hgr 1
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4000.5FFF hgr 2
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empty but buffers
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6800.74FF data
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7500.99FF program code
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empty
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A000.BFFF loader & mode interpreter
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Addresses to rewrite in BD.0800.S
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7500
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8D10
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8D45
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8D6E
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8D93
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8E48
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8E8A
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8E94
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9022
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9110
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plus a couple of addresses in table at $1D05
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BD00
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BD03
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T12..T15: 4 tracks of HGR pictures
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---
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1=m 1=x 0=d 1=LCbank (0/1)
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00/0800: 20 FE 09 JSR 09FE
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00/0803: 8D 50 C0 STA C050
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00/0806: 8D 55 C0 STA C055
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00/0809: 8D E9 C0 STA C0E9
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00/080C: A9 20 LDA #20
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00/080E: 85 3E STA 3E
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00/0810: A9 12 LDA #12
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00/0812: 85 F8 STA F8
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00/0814: A5 F8 LDA F8
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00/0816: 20 03 BC JSR BC03
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00/0819: D0 F9 BNE 0814 {-07}
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00/081B: A5 3E LDA 3E
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00/081D: 18 CLC
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00/081E: 69 10 ADC #10
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00/0820: 85 3E STA 3E
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00/0822: C9 60 CMP #60
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00/0824: F0 04 BEQ 082A {+04}
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00/0826: E6 F8 INC F8
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00/0828: D0 EA BNE 0814 {-16}
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00/082A: A9 05 LDA #05
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*
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1=m 1=x 0=d 1=LCbank (0/1)
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00/7500: A5 19 LDA 19
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00/7502: 18 CLC
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00/7503: 69 01 ADC #01
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00/7505: 85 19 STA 19
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00/7507: 18 CLC
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00/7508: 29 01 AND #01
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00/750A: F0 03 BEQ 750F {+03}
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00/750C: 4C 8E 7F JMP 7F8E
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00/750F: A5 05 LDA 05
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00/7511: A2 64 LDX #64
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00/7513: A4 06 LDY 06
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00/7515: 88 DEY
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00/7516: 30 08 BMI 7520 {+08}
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00/7518: 69 28 ADC #28
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00/751A: 90 F9 BCC 7515 {-07}
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00/751C: E8 INX
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00/751D: 18 CLC
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00/751E: D0 F5 BNE 7515 {-0B}
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00/7520: 8D 19 76 STA 7619
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00/7523: 8E 1A 76 STX 761A
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*
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1=m 1=x 0=d 1=LCbank (0/1)
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00/A000: 18 CLC
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00/A001: 60 RTS
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00/A002: DD A0 20 CMP 20A0,X
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00/A005: 88 DEY
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00/A006: F0 58 BEQ A060 {+58}
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00/A008: AD EC C0 LDA C0EC
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00/A00B: 10 FB BPL A008 {-05}
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00/A00D: 49 D5 EOR #D5
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00/A00F: D0 F4 BNE A005 {-0C}
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00/A011: AD EC C0 LDA C0EC
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00/A014: 10 FB BPL A011 {-05}
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00/A016: C9 AA CMP #AA
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00/A018: D0 F3 BNE A00D {-0D}
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00/A01A: AD EC C0 LDA C0EC
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00/A01D: 10 FB BPL A01A {-05}
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00/A01F: C9 AD CMP #AD
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00/A021: D0 EA BNE A00D {-16}
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00/A023: 48 PHA
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00/A024: 68 PLA
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00/A025: A0 56 LDY #56
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*
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