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iigs-game-engine
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Fix some bugs introduced by the abs indexed addressing mode changes

This commit is contained in:
Lucas Scharenbroich 2023-05-21 23:37:36 -05:00
parent cc3ee6be0f
commit b0ed4f9692
1 changed files with 22 additions and 7 deletions
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29
demos/smb/rom.s
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@ -44,6 +44,7 @@ JOYPAD_PORT1 = $4016
JOYPAD_PORT2 = $4017
GTE_TMP = $10 ; No zero page references in the assembly to this location
;GTE_TMP = $7000 ; No zero page references in the assembly to this location
; GAME SPECIFIC DEFINES
ObjectOffset = $08
@ -3733,6 +3734,11 @@ FreCompLoop dex ;check regular slot
bne FreCompLoop
lda #$00 ;if enemy object already present, nullify queue and leave
ExitAFrenzy sta EnemyFrenzyQueue ;store enemy into frenzy queue
phx ; GTE swap registers back
tyx
ply
rts
;--------------------------------
@ -6814,7 +6820,7 @@ Setup_Vine
lda Block_X_Position,x ; FIXME
pha
lda Block_Y_Position,x ; FIXME
ldx GTE_TMP
sta Enemy_Y_Position,x ;copy vertical coordinate from previous object
pla
@ -7148,11 +7154,13 @@ CoinBlock
lda Block_PageLoc,x ;get page location of block object
tyx
sta Misc_PageLoc,x ;store as page location of misc object
ldx GTE_TMP
lda Block_X_Position,x ;get horizontal coordinate of block object
ora #$05 ;add 5 pixels
tyx
sta Misc_X_Position,x ;store as horizontal coordinate of misc object
ldx GTE_TMP
lda Block_Y_Position,x ;get vertical coordinate of block object
sbc #$10 ;subtract 16 pixels
@ -8799,8 +8807,10 @@ DuplicateEnemyObj
lda Enemy_Flag,x ;check enemy buffer flag for empty slot
bne :FSLoop ;if set, branch and keep checking
stx DuplicateObj_Offset ;otherwise set offset here
txy ; GTE put final val back into y
ldx GTE_TMP
txa ;transfer original enemy buffer offset
ora #%10000000 ;store with d7 set as flag in new enemy
; sta Enemy_Flag,y ;slot as well as enemy offset
@ -8814,21 +8824,26 @@ DuplicateEnemyObj
; sta Enemy_X_Position,y
pha
lda Enemy_Y_Position,x
; sta Enemy_Y_Position,y ;copy vertical coordinate from original to new
pha
lda #$01
sta Enemy_Flag,x ;set flag as normal for original enemy
; sta Enemy_Y_HighPos,y ;set high vertical byte for new enemy
lda Enemy_Y_Position,x
; sta Enemy_Y_Position,y ;copy vertical coordinate from original to new
tyx
sta Enemy_Y_Position,x
lda #$01
sta Enemy_Y_HighPos,x
pla
sta Enemy_Y_Position,x
pla
sta Enemy_X_Position,x
pla
sta Enemy_PageLoc,x
pla
sta Enemy_Flag,x