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Tetris (Game Boy)/ROM map
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The following article is a ROM map for Tetris (Game Boy).
Generate next Tetromino
ROM0:2062 21 00 C2 ld hl,C200 ROM0:2065 36 00 ld (hl),00 ROM0:2067 2C inc l ROM0:2068 36 18 ld (hl),18 ROM0:206A 2C inc l ROM0:206B 36 3F ld (hl),3F ROM0:206D 2C inc l ROM0:206E FA 13 C2 ld a,(C213) ROM0:2071 77 ld (hl),a ROM0:2072 E6 FC and a,FC ROM0:2074 4F ld c,a ROM0:2075 F0 E4 ld a,(ff00+E4) ROM0:2077 A7 and a ROM0:2078 20 05 jr nz,207F ROM0:207A F0 C5 ld a,(ff00+C5) ROM0:207C A7 and a ROM0:207D 28 1D jr z,209C ROM0:207F 26 C3 ld h,C3 ROM0:2081 F0 B0 ld a,(ff00+B0) ROM0:2083 6F ld l,a ROM0:2084 5E ld e,(hl) ROM0:2085 23 inc hl ROM0:2086 7C ld a,h ROM0:2087 FE C4 cp a,C4 ROM0:2089 20 03 jr nz,208E ROM0:208B 21 00 C3 ld hl,C300 ROM0:208E 7D ld a,l ROM0:208F E0 B0 ld (ff00+B0),a ROM0:2091 F0 D3 ld a,(ff00+D3) ROM0:2093 A7 and a ROM0:2094 28 2A jr z,20C0 ROM0:2096 F6 80 or a,80 ROM0:2098 E0 D3 ld (ff00+D3),a ROM0:209A 18 24 jr 20C0 ROM0:209C 26 03 ld h,03 ROM0:209E F0 04 ld a,(ff00+04) ROM0:20A0 47 ld b,a ROM0:20A1 AF xor a ROM0:20A2 05 dec b ROM0:20A3 28 0A jr z,20AF ROM0:20A5 3C inc a ROM0:20A6 3C inc a ROM0:20A7 3C inc a ROM0:20A8 3C inc a ROM0:20A9 FE 1C cp a,1C ROM0:20AB 28 F4 jr z,20A1 ROM0:20AD 18 F3 jr 20A2 ROM0:20AF 57 ld d,a ROM0:20B0 F0 AE ld a,(ff00+AE) ROM0:20B2 5F ld e,a ROM0:20B3 25 dec h ROM0:20B4 28 07 jr z,20BD ROM0:20B6 B2 or d ROM0:20B7 B1 or c ROM0:20B8 E6 FC and a,FC ROM0:20BA B9 cp c ROM0:20BB 28 E1 jr z,209E ROM0:20BD 7A ld a,d ROM0:20BE E0 AE ld (ff00+AE),a ROM0:20C0 7B ld a,e ROM0:20C1 EA 13 C2 ld (C213),a ;write next Tetromino to wC213 ROM0:20C4 CD EA 26 call 26EA ROM0:20C7 F0 9A ld a,(ff00+9A) ROM0:20C9 E0 99 ld (ff00+99),a ROM0:20CB C9 ret
Internal Data for Tetris (Game Boy)
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