mirror of
https://github.com/pevans/erc-c.git
synced 2024-11-27 20:51:17 +00:00
146 lines
2.9 KiB
NASM
146 lines
2.9 KiB
NASM
GBASL EQU $26
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GBASH EQU $27
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BAS2H EQU $2B
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A1L EQU $3C
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A1H EQU $3D
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A3L EQU $40
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A3H EQU $41
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STACK EQU $0100
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OFFPH0 EQU $C080
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ONPH0 EQU $C081
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TURNON EQU $C089
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SLCTD1 EQU $C08A
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READ EQU $C08C
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SETRD EQU $C08E
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WAIT EQU $FCA8
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IMMRTS EQU $FF58
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00:A2 20 LDX #$20
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02:A0 00 LDY #$00
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04:A2 03 LDX #$03
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06:86 3C SAVTMP STX A1L
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08:8A TXA
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09:0A ASL A
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0A:24 3C BIT A1L
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0C:F0 10 BEQ INCX
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0E:05 3C ORA A1L
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10:49 FF ADC #$FF
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12:29 7E AND #$7E
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14:B0 08 HASCRY BCS INCX
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16:4A LSR A
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17:D0 FB BNE HASCRY
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19:98 TYA
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1A:9D 56 03 STA $0356,X
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1D:C8 INY
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1E:E8 INCX INX
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1F:10 E5 BPL SAVTMP
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21:20 58 FF JSR IMMRTS
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24:BA TSX
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25:BD 00 01 LDA STACK,X
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28:0A ASL
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29:0A ASL
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2A:0A ASL
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2B:0A ASL
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2C:85 2B STA $2B
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2E:AA TAX
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2F:BD 8E C0 LDA SETRD,X
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32:BD 8C C0 LDA READ,X
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35:BD 8A C0 LDA SLCTD1,X
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38:BD 89 C0 LDA TURNON,X
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3B:A0 50 LDY #$50
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3D:BD 80 C0 LDA OFFPH0,X
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40:98 TYA
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41:29 03 AND #$03
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43:0A ASL
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44:05 2B ORA $2B
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46:AA TAX
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47:BD 81 C0 LDA ONPH0,X
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4A:A9 56 LDA #$56
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4C:20 A8 FC JSR WAIT
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4F:88 DEY
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50:10 EB BPL [3d]
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52:85 26 STA GBASL
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54:85 3D STA A1H
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56:85 41 STA A3H
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58:A9 08 LDA #$08
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5A:85 27 STA GBASH
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5C:18 CLC
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5D:08 PHP
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5E:BD 8C C0 LDA READ,X
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61:10 FB BPL [5e]
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63:49 D5 EOR #$D5
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65:D0 F7 BNE [5e]
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67:BD 8C C0 LDA READ,X
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6A:10 FB BPL [67]
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6C:C9 AA CMP #$AA
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6E:D0 F3 BNE [63]
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70:EA NOP
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71:BD 8C C0 LDA READ,X
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74:10 FB BPL [71]
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76:C9 96 CMP #$96
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78:F0 09 BEQ [83]
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7A:28 PLP
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7B:90 DF BCC [5c]
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7D:49 AD EOR #$AD
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7F:F0 25 BEQ [a6]
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81:D0 D9 BNE [5c]
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83:A0 03 LDY #$03
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85:85 40 STA A3L
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87:BD 8C C0 LDA READ,X
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8A:10 FB BPL [87]
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8C:2A ROL A
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8D:85 3C STA A1L
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8F:BD 8C C0 LDA READ,X
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92:10 FB BPL [8f]
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94:25 3C AND A1L
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96:88 DEY
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97:D0 EC BNE [85]
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99:28 PLP
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9A:C5 3D CMP A1H
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9C:D0 BE BNE [5c]
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9E:A5 40 LDA A3L
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A0:C5 41 CMP A3H
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A2:D0 B8 BNE [5c]
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A4:B0 B7 BCS [5d] ;; weird
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A6:A0 56 LDY #$56
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A8:84 3C STY A1L
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AA:BC 8C C0 LDY READ,X
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AD:10 FB BPL [aa]
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AF:59 D6 02 EOR $02D6,X
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B2:A4 3C LDY A1L
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B4:88 DEY
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B5:99 00 03 STA $0300,Y
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B8:D0 EE BNE [a8]
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BA:84 3C STY A1L
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BC:BC 8C C0 LDY READ,X
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BF:10 FB BPL [bc]
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C1:59 D6 02 EOR $02D6,X
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C4:A4 3C LDY A1L
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C6:91 26 STA (GBASL),Y
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C8:C8 INY
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C9:D0 EF BNE [ba]
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CB:BC 8C C0 LDY READ,X
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CE:10 FB BPL [cb]
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D0:59 D6 02 EOR $02D6,X
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D3:D0 87 BNE [5c]
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D5:A0 00 LDY #$00
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D7:A2 56 LDX #$56
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D9:CA DEX
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DA:30 FB BMI [d7]
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DC:B1 26 LDA (GBASL),Y
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DE:5E 00 03 LSR $0300,X
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E1:2A ROL A
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E2:5E 00 03 STA (GBASL),Y
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E5:2A ROL A
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E6:91 26 STA (GBASL),Y
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E8:C8 INY
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E9:D0 EE BNE [d9]
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EB:E6 27 INC GBASH
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ED:E6 3D INC A1H
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EF:A5 3D LDA A1H
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F1:CD 00 08 CMP $0800
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F4:A6 2B LDX $2B
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F6:90 DB BCC [d3]
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F8:4C 01 08 JMP $0801
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