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Applied labels and byte designators

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codemann8
2024-04-05 20:50:04 -05:00
committed by aerinon
parent 2e2b493240
commit a70251d2b2
114 changed files with 2786 additions and 2970 deletions
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58
enemizer/DMA.asm
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@@ -17,56 +17,56 @@
macro DMA_VRAM(VRAM_HIGH,VRAM_LOW,SRC_BANK,SRC_HIGH,SRC_LOW,LENGTH_HIGH,LENGTH_LOW)
PHA
; --- preserve DMA registers ----------------------------------------------------
LDA !DMA0_REG : PHA
LDA !DMA0_DEST_REG : PHA
LDA !DMA0_SRC_LOW_REG : PHA
LDA !DMA0_SRC_HIGH_REG : PHA
LDA !DMA0_SRC_BANK_REG : PHA
LDA !DMA0_SIZE_LOW_REG : PHA
LDA !DMA0_SIZE_HIGH_REG : PHA
LDA.w !DMA0_REG : PHA
LDA.w !DMA0_DEST_REG : PHA
LDA.w !DMA0_SRC_LOW_REG : PHA
LDA.w !DMA0_SRC_HIGH_REG : PHA
LDA.w !DMA0_SRC_BANK_REG : PHA
LDA.w !DMA0_SIZE_LOW_REG : PHA
LDA.w !DMA0_SIZE_HIGH_REG : PHA
; -------------------------------------------------------------------------------
;LDA.b #$80 : STA !DISP_REG ; force vblank
LDA #$80 : STA !VMAIN_REG
;LDA.b #$80 : STA.w !DISP_REG ; force vblank
LDA.b #$80 : STA.w !VMAIN_REG
; write to vram at $<VRAM_HIGH><VRAM_LOW>
LDA <VRAM_LOW> : STA !VRAM_LOW_REG ; Set VRAM destination address low byte
LDA <VRAM_HIGH> : STA !VRAM_HIGH_REG ; Set VRAM destination address high byte
LDA.b <VRAM_LOW> : STA.w !VRAM_LOW_REG ; Set VRAM destination address low byte
LDA.b <VRAM_HIGH> : STA.w !VRAM_HIGH_REG ; Set VRAM destination address high byte
; Set DMA0 to write a word at a time.
LDA #$01
STA !DMA0_REG
LDA.b #$01
STA.w !DMA0_REG
; Write to $2118 & $2119 - VRAM Data Write Registers (Low) & VRAM Data Write Registers (High)
; setting word write mode on DMA0_REG causes a write to $2118 and then $2119
; $21xx is assumed
LDA #$18
STA !DMA0_DEST_REG
LDA.b !VRAM_WRITE_REG
STA.w !DMA0_DEST_REG
; Read from $<SRC_BANK>:<SRC_HIGH><SRC_LOW>.
LDA.b <SRC_LOW>
STA !DMA0_SRC_LOW_REG ; set src address low byte
STA.w !DMA0_SRC_LOW_REG ; set src address low byte
LDA.b <SRC_HIGH>
STA !DMA0_SRC_HIGH_REG ; set src address high byte
STA.w !DMA0_SRC_HIGH_REG ; set src address high byte
LDA.b <SRC_BANK>
STA !DMA0_SRC_BANK_REG ; set src address bank byte
STA.w !DMA0_SRC_BANK_REG ; set src address bank byte
; total bytes to copy: #$1000 bytes.
LDA <LENGTH_LOW> : STA $4305 ; length low byte
LDA <LENGTH_HIGH> : STA $4306 ; length high byte
LDA.b <LENGTH_LOW> : STA.w !DMA0_SIZE_LOW_REG ; length low byte
LDA.b <LENGTH_HIGH> : STA.w !DMA0_SIZE_HIGH_REG ; length high byte
; start DMA on channel 0
LDA #$01 ; channel select bitmask
STA !DMA_ENABLE_REG
LDA.b #$01 ; channel select bitmask
STA.w !DMA_ENABLE_REG
; --- restore DMA registers -----------------------------------------------------
PLA : STA !DMA0_SIZE_HIGH_REG
PLA : STA !DMA0_SIZE_LOW_REG
PLA : STA !DMA0_SRC_BANK_REG
PLA : STA !DMA0_SRC_HIGH_REG
PLA : STA !DMA0_SRC_LOW_REG
PLA : STA !DMA0_DEST_REG
PLA : STA !DMA0_REG
PLA : STA.w !DMA0_SIZE_HIGH_REG
PLA : STA.w !DMA0_SIZE_LOW_REG
PLA : STA.w !DMA0_SRC_BANK_REG
PLA : STA.w !DMA0_SRC_HIGH_REG
PLA : STA.w !DMA0_SRC_LOW_REG
PLA : STA.w !DMA0_DEST_REG
PLA : STA.w !DMA0_REG
; -------------------------------------------------------------------------------
PLA
endmacro