alttpr-gwaa-kiwi/alttpr-baserom
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let's dev 5/1/18

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fixed reverse residual portal graphics
dw duck pickup & dropoff now working
additional dpad challenge modes
This commit is contained in:
Karkat
2018-05-01 23:23:13 -04:00
parent b86d3d4756
commit 795d91cdb1
4 changed files with 55 additions and 11 deletions
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46
dpadinvert.asm
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@@ -2,17 +2,51 @@
; D-Pad Invert
; runs in NMI, must use minimum possible # of cycles
;--------------------------------------------------------------------------------
; Filtered Joypad 1 Register: [BYST | udlr].
; Filtered Joypad 1 Register: [AXLR | ????]
; Filtered Joypad 1 Register: [BYST | udlr] [AXLR | ????]
!INVERT_DPAD = "$7F50CB"
InvertDPad:
LDA !INVERT_DPAD : BEQ .normal
.inverted
DEC : BEQ .dpadOnly
DEC : BEQ .buttonsOnly
DEC : BEQ .invertBoth
.swapSides
REP #$20 ; set 16-bit accumulator
LDA $4218
BIT.w #$0840 : BEQ + : EOR.w #$0840 : + ; swap X/up
BIT.w #$0180 : BEQ + : EOR.w #$0180 : + ; swap A/right
BIT.w #$4200 : BEQ + : EOR.w #$4200 : + ; swap Y/left
BIT.w #$8400 : BEQ + : EOR.w #$8400 : + ; swap B/down
STA $00
SEP #$20 ; set 8-bit accumulator
JML.l InvertDPadReturn
.invertBoth
REP #$20 ; set 16-bit accumulator
LDA $4218
BIT.w #$8040 : BEQ + : EOR.w #$8040 : + ; swap X/B
BIT.w #$4080 : BEQ + : EOR.w #$4080 : + ; swap Y/A
BIT.w #$0C00 : BEQ + : EOR.w #$0C00 : + ; swap up/down
BIT.w #$0300 : BEQ + : EOR.w #$0300 : + ; swap left/right
STA $00
SEP #$20 ; set 8-bit accumulator
JML.l InvertDPadReturn
.buttonsOnly
REP #$20 ; set 16-bit accumulator
LDA $4218
BIT.w #$8040 : BEQ + : EOR.w #$8040 : + ; swap X/B
BIT.w #$4080 : BEQ + : EOR.w #$4080 : + ; swap Y/A
STA $00
SEP #$20 ; set 8-bit accumulator
JML.l InvertDPadReturn
.dpadOnly
LDA $4218 : STA $00
LDA $4219
BIT.b #$0C : BEQ + : EOR #$0C : +
BIT.b #$03 : BEQ + : EOR #$03 : +
BIT.b #$0C : BEQ + : EOR.b #$0C : + ; swap up/down
BIT.b #$03 : BEQ + : EOR.b #$03 : + ; swap left/right
STA $01
RTL
JML.l InvertDPadReturn
.normal
LDA $4218 : STA $00
LDA $4219 : STA $01
RTL
JML.l InvertDPadReturn
;--------------------------------------------------------------------------------