Files
alttpr-baserom/framehook.asm
Karkat c4452389bb let's dev feb 28 2017
fixed boss swords incrementing the wrong sword when bossed drop swords
quick swap support officially enabled and permitting in non-race modes in all generators
2018-03-01 00:27:39 -05:00

79 lines
2.7 KiB
NASM

;================================================================================
; Frame Hook
;--------------------------------------------------------------------------------
; $7EF42Ew[2] - loop frame counter (low)
!LOOP_FRAMES_LOW = "$7EF42E"
;--------------------------------------------------------------------------------
; $7EF430w[2] - loop frame counter (high)
!LOOP_FRAMES_HIGH = "$7EF430"
;--------------------------------------------------------------------------------
; $7EF43Ew[2] - nmi frame counter (low)
!NMI_FRAMES_LOW = "$7EF43E"
;--------------------------------------------------------------------------------
; $7EF440w[2] - nmi frame counter (high)
!NMI_FRAMES_HIGH = "$7EF440"
;--------------------------------------------------------------------------------
; $7EF444w[2] - item menu frame counter (low)
!ITEM_FRAMES_LOW = "$7EF444"
;--------------------------------------------------------------------------------
; $7EF446w[2] - item menu frame counter (high)
!ITEM_FRAMES_HIGH = "$7EF446"
;--------------------------------------------------------------------------------
!LOCK_STATS = "$7EF443"
FrameHookAction:
JSL $0080B5 ; Module_MainRouting
PHA : PHP
;LDA EnableSRAMTrace : AND.l TournamentSeedInverse : BEQ +
; LDA $1A : BNE ++ : JSL.l WriteStatusPreview : ++ ; write every 256 frames
;+
LDA !LOCK_STATS : BNE ++
REP #$20 ; set 16-bit accumulator
LDA !LOOP_FRAMES_LOW : INC : STA !LOOP_FRAMES_LOW : BNE +
LDA !LOOP_FRAMES_HIGH : INC : STA !LOOP_FRAMES_HIGH
+
LDA $10 : CMP.w #$010E : BNE + ; move this to nmi hook?
LDA !ITEM_FRAMES_LOW : INC : STA !ITEM_FRAMES_LOW : BNE +
LDA !ITEM_FRAMES_HIGH : INC : STA !ITEM_FRAMES_HIGH
+
SEP #$20 ; set 8-bit accumulator ?? check this
++
PLP : PLA
RTL
;--------------------------------------------------------------------------------
NMIHookAction:
PHA : PHX : PHY : PHD ; thing we wrote over, push stuff
LDA !LOCK_STATS : AND.w #$00FF : BNE ++
LDA !NMI_FRAMES_LOW : INC : STA !NMI_FRAMES_LOW : BNE +
LDA !NMI_FRAMES_HIGH : INC : STA !NMI_FRAMES_HIGH
+
++
JML.l NMIHookReturn
;--------------------------------------------------------------------------------
!NMI_AUX = "$7F5044"
PostNMIHookAction:
LDA !NMI_AUX+2 : BEQ +
LDA $00 : PHA ; preserve DP ram
LDA $01 : PHA
LDA $02 : PHA
LDA !NMI_AUX+2 : STA $02 ; set up jump pointer
LDA !NMI_AUX+1 : STA $01
LDA !NMI_AUX+0 : STA $00
PHK : PER .return-1 ; push stack for RTL return
JMP [$0000]
.return
LDA.b #$00 : STA !NMI_AUX+2 ; zero bank byte of NMI hook pointer
PLA : STA $02
PLA : STA $01
PLA : STA $00
+
LDA $13 : STA $2100 ; thing we wrote over, turn screen back on
JML.l PostNMIHookReturn
;--------------------------------------------------------------------------------