scawful/oracle-of-secrets
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Start Farore custom sprite, rearrange banks

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scawful
2023-04-16 17:49:47 -05:00
parent 18fbb9e1bd
commit 5021977b06
14 changed files with 322 additions and 151 deletions
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53
Items/book_of_secrets.asm
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@@ -23,35 +23,40 @@ BRA $1C ; make it always branch, so map isn't loaded anymore
; =============================================================================
; long subroutine that is executed every frame
org $068365
JSL $3CA600 ; overwrite it (originally JSL $099F91)
JSL LinkItem_SecretsBook ; overwrite it (originally JSL $099F91)
; =============================================================================
; go to expanded space to write our routine
; (keep EveryFrame.asm in mind for the right adresses)
org $3CA600
LDA $1B ; load data that tells us whether we are in a building or not
AND #$01 ; are we in a building?
BEQ END ; if not, don't use the x-button-secret
; org $3CA600
org $228000
LinkItem_SecretsBook:
{
LDA $1B ; load data that tells us whether we are in a building or not
AND #$01 ; are we in a building?
BEQ .end ; if not, don't use the x-button-secret
; ----------
LDA $7EF34D ; load book of mudora slot
CMP #$01 ; do we have the moon pearl?
BNE $0F ; if not, go to enable BG2
LDA $F2 ; load unfiltered joypad 1 register (AXLR|????)
AND #$50 ; delete all bits except those for X and R
SEC ; set carry for the following subtraction
SBC #$50 ; X+R button pressed? (if yes, zero flag is set)
BNE $06 ; if not, go to enable BG2
LDA $1C ; load layer flags
AND #$FD ; disable BG2 (0xFD = 11111101)
BRA $04 ; go to store layer flags
LDA $1C ; load layer flags
ORA #$02 ; enable BG2 (0x02 = 00000010)
STA $1C ; store layer flags
; ----------
; ----------
LDA $7EF34D ; load book of mudora slot
CMP #$01 ; do we have the moon pearl?
BNE $0F ; if not, go to enable BG2
LDA $F2 ; load unfiltered joypad 1 register (AXLR|????)
AND #$50 ; delete all bits except those for X and R
SEC ; set carry for the following subtraction
SBC #$50 ; X+R button pressed? (if yes, zero flag is set)
BNE $06 ; if not, go to enable BG2
LDA $1C ; load layer flags
AND #$FD ; disable BG2 (0xFD = 11111101)
BRA $04 ; go to store layer flags
LDA $1C ; load layer flags
ORA #$02 ; enable BG2 (0x02 = 00000010)
STA $1C ; store layer flags
; ----------
.end
JSL $099F91 ; at least execute original code
RTL
}
END:
JSL $099F91 ; at least execute original code
RTL
; =============================================================================