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Yu-Gi-Oh! Monster Capsule GB/ROM map
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The following article is a ROM map for Yu-Gi-Oh! Monster Capsule GB.
Bank 0
Load intro
ROM0:2B4D 3E FF ld a,FF ROM0:2B4F EA 01 C2 ld (C201),a ROM0:2B52 EA BD C2 ld (C2BD),a ROM0:2B55 3E 09 ld a,00 ROM0:2B57 EA 00 C2 ld (C200),a // Intro ROM0:2B5A F0 96 ld a,(ff00+96) ROM0:2B5C F6 02 or a,02 ROM0:2B5E E0 96 ld (ff00+96),a ROM0:2B60 CD 62 32 call 3262 ROM0:2B63 CD 46 0A call 0A46
Load requested screen
ROM0:2C26 FA 00 C2 ld a,(C200) // Screen ID ROM0:2C29 4F ld c,a ROM0:2C2A 87 add a ROM0:2C2B 81 add c ROM0:2C2C 21 92 2C ld hl,2C92 ROM0:2C2F 06 00 ld b,00 ROM0:2C31 4F ld c,a ROM0:2C32 09 add hl,bc // hl = 0x2C92 + (Screen ID × 3) ROM0:2C33 2A ldi a,(hl) ROM0:2C34 4F ld c,a ROM0:2C35 2A ldi a,(hl) ROM0:2C36 47 ld b,a ROM0:2C37 2A ldi a,(hl) // Load pointer + bank ROM0:2C38 CD ED 0A call 0AED // Bank switch ROM0:2C3B 69 ld l,c ROM0:2C3C 60 ld h,b ROM0:2C3D 01 42 2C ld bc,2C42 ROM0:2C40 C5 push bc ROM0:2C41 E9 jp hl // Jump to pointer ROM0:2C42 CD BA 02 call 02BA ROM0:2C45 CD 69 22 call 2269 ROM0:2C48 CD 2E 32 call 322E ROM0:2C4B FA 01 C2 ld a,(C201) ROM0:2C4E FE FF cp a,FF ROM0:2C50 28 D4 jr z,2C26 ROM0:2C52 FA 01 C2 ld a,(C201) ROM0:2C55 EA 00 C2 ld (C200),a ROM0:2C58 3E FF ld a,FF ROM0:2C5A EA 01 C2 ld (C201),a ROM0:2C5D F0 96 ld a,(ff00+96) ROM0:2C5F CB 7F bit 7,a ROM0:2C61 28 13 jr z,2C76 ROM0:2C63 FA 00 C2 ld a,(C200) ROM0:2C66 FE 07 cp a,07 ROM0:2C68 28 0C jr z,2C76 ROM0:2C6A FE 08 cp a,08 ROM0:2C6C 28 08 jr z,2C76 ROM0:2C6E FE 05 cp a,05 ROM0:2C70 CC 89 2C call z,2C89 ROM0:2C73 CD 58 0D call 0D58 ROM0:2C76 CD 46 0A call 0A46 ROM0:2C79 7F ld a,a ROM0:2C7A 45 ld b,l ROM0:2C7B 03 inc bc ROM0:2C7C FA 00 C2 ld a,(C200) ROM0:2C7F B7 or a ROM0:2C80 C2 99 2B jp nz,2B99 ROM0:2C83 CD 58 0D call 0D58 ROM0:2C86 C3 5A 2B jp 2B5A ROM0:2C89 3E 49 ld a,49 ROM0:2C8B CD 8C 16 call 168C ROM0:2C8E CD 42 16 call 1642 ROM0:2C91 C9 ret
Screen pointers and banks
ROM0:2C92 B0 2C 00 - Intro 7B 40 18 F9 4B 18 AE 49 18 16 44 02 00 40 01 00 40 01 05 40 08 14 40 08 8C 51 03 - Sound test 05 03 08
Bank 18
Title screen
Checks button pressed
RO18:4AF5 5F ld e,a RO18:4AF6 71 ld (hl),c RO18:4AF7 1A ld a,(de) RO18:4AF8 7F ld a,a RO18:4AF9 72 ld (hl),d RO18:4AFA EA 49 1A ld (1A49),a RO18:4AFD 21 84 03 ld hl,0384 RO18:4B00 CD 1D 46 call 461D RO18:4B03 21 09 4B ld hl,4B09 RO18:4B06 CD DD 45 call 45DD RO18:4B09 F0 AA ld a,(ff00+AA) RO18:4B0B E6 90 and a,90 RO18:4B0D 20 0A jr nz,4B19 // If(button == A || button == Start), jump to 18:4B19 RO18:4B0F CD 26 46 call 4626 RO18:4B12 C0 ret nz RO18:4B13 3E 01 ld a,01 RO18:4B15 EA 01 C2 ld (C201),a RO18:4B18 C9 ret
Button A or Start pressed
RO18:4B19 3E DC ld a,DC RO18:4B1B CD 77 3B call 3B77 RO18:4B1E AF xor a RO18:4B1F CD 67 4B call 4B67 RO18:4B22 21 05 00 ld hl,0005 RO18:4B25 CD 22 47 call 4722 RO18:4B28 3E 01 ld a,01 RO18:4B2A CD 67 4B call 4B67 RO18:4B2D 21 05 00 ld hl,0005 RO18:4B30 CD 22 47 call 4722 RO18:4B33 06 08 ld b,08 RO18:4B35 21 C8 49 ld hl,49C8 RO18:4B38 CD D0 15 call 15D0 RO18:4B3B 3E 00 ld a,00 RO18:4B3D E0 9C ld (ff00+9C),a RO18:4B3F 21 04 00 ld hl,0004 RO18:4B42 CD 22 47 call 4722 RO18:4B45 AF xor a RO18:4B46 CD 67 4B call 4B67 RO18:4B49 21 01 00 ld hl,0001 RO18:4B4C CD 22 47 call 4722 RO18:4B4F 06 08 ld b,08 RO18:4B51 21 FA 4A ld hl,4AFA RO18:4B54 CD D0 15 call 15D0 RO18:4B57 3E E4 ld a,E4 RO18:4B59 E0 9C ld (ff00+9C),a RO18:4B5B 21 39 00 ld hl,0039 RO18:4B5E CD 22 47 call 4722 RO18:4B61 3E 04 ld a,04 RO18:4B63 EA 01 C2 ld (C201),a RO18:4B66 C9 ret
Internal Data for Yu-Gi-Oh! Monster Capsule GB
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