GSCats/macros.s
2017-10-08 16:46:35 -07:00

227 lines
2.5 KiB
ArmAsm

.macro OP8
.i8
.a8
.endmacro
.macro OP16
.i16
.a16
.endmacro
.macro BITS8A
sep #%00100000
.a8
.endmacro
.macro BITS8
sep #%00110000
OP8
.endmacro
.macro BITS16
rep #%00110000
OP16
.endmacro
.macro DBR bankNum
BITS8
lda bankNum
pha
plb
BITS16
.endmacro
.macro SYNCDBR
phk
plb
.endmacro
.macro EMULATION
sec ; Enable 8-bit mode
xce
OP8
.endmacro
.macro NATIVE
clc ; Enable 16-bit mode
xce
BITS16
.endmacro
.macro SHRVIDEO
BITS8
lda NEWVIDEO
ora #%11000001
sta NEWVIDEO
BITS16
.endmacro
.macro CLASSICVIDEO
BITS8
lda NEWVIDEO
and #%00111111
sta NEWVIDEO
BITS16
.endmacro
.macro SHADOWMEMORY
sep #%00100000 ; 3 16-bit A only, to preserve X/Y
.a8
lda SHADOW ;5
sta SHADOWREGISTER ;4
lda #0 ;2
sta SHADOW ;5
rep #%00100000 ;3
.a16
.endmacro
.macro NORMALMEMORY
sep #%00100000 ; 3 16-bit A only, to preserve X/Y
.a8
lda SHADOWREGISTER ;4
sta SHADOW ;5
rep #%00100000 ;3
.a16
.endmacro
.macro FASTGRAPHICS ;34 cycles, 12 bytes
sei ;2
phd ;4
sep #%00100000 ; 3 16-bit A only, to preserve X/Y
.a8
lda STACKCTL ;5
sta STACKREGISTER ;4
ora #$30 ;2
sta STACKCTL ;5
rep #%00100000 ;3
.a16
tsc ;2
sta STACKPTR ;4
.endmacro
.macro SLOWGRAPHICS ;28 cycles, 12 bytes
sep #%00100000 ; 3 16-bit A only, to preserve X/Y
.a8
lda STACKREGISTER ;4
sta STACKCTL ;5
rep #%00100000 ;3
.a16
lda STACKPTR ;4
tcs ;2
pld ;5
cli ;2
.endmacro
.macro LOADPARAM24 bankNumDoubled,addr16
lda #bankNumDoubled
sta PARAM24+1
lda #addr16
sta PARAM24
.endmacro
.macro pstring Arg
.byte .strlen(Arg), Arg
.endmacro
.macro qbyte Arg
.dbyt Arg>>16,Arg&$0000ffff
.endmacro
.macro BREAK
pha
lda breakpoint
beq nobrk
lda #1
sta $e1c029
pla
brk
nobrk:
pla
.endmacro
;;;;;;;;;;
; Stack Macros
.macro SAVE_AXY ; Saves all registers
pha
phx
phy
.endmacro
.macro RESTORE_AXY ; Restores all registers
ply
plx
pla
.endmacro
.macro SAVE_AY ; Saves accumulator and Y index
pha
phy
.endmacro
.macro RESTORE_AY ; Restores accumulator and Y index
ply
pla
.endmacro
.macro SAVE_AX ; Saves accumulator and X index
pha
phx
.endmacro
.macro RESTORE_AX ; Restores accumulator and X index
plx
pla
.endmacro
.macro SAVE_XY ; Saves X and Y index
phx
phy
.endmacro
.macro RESTORE_XY ; Restores X and Y index
ply
plx
.endmacro
.macro SAVE_P0 ; Saves PARAML0
lda PARAML0
pha
.endmacro
.macro RESTORE_P0 ; Restores PARAML0
pla
sta PARAML0
.endmacro