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HWDriver.asm
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.setcpu "65816"
.autoimport on
.include "common-macros.inc"
.include "GlobalVars.inc"
.include "ports.inc"
.import PaletteBase:far
; API LIST
; =============== Initialization Utilities ===============
.export initSystemGenericStatuses
.export initVideoForGame
.export initVideoForMode7
.export clearVRAMDirect
; ==================== Screen Control ====================
.export disableScreen
.export enableScreensWithBrightness
.export enableBG2WithBrightness
.export setScreenBrightness
.export disableNMI
.export enableNMI
.export forceStopHDMA
.export resetScroll
; ======================= Transfer =======================
.export transferPaletteData
.export transferPaletteDataBulk8
.export transferBitmapDataDMA
; ◆ ハードウェア初期化
; ビデオ関係は外でするので、今のところパッド入力のオプションのみ
; A16, I16
.proc initSystemGenericStatuses
.a16
.i16
save_paxy
set_a8
.a8
; Disable old-style pad input
stz $4016
set_a16
.a16
restore_paxy
rts
.endproc
; ◆ ビデオ初期化
; ・画面モード、チップサイズ設定
; ・VRAMアドレス設定
; A16, I16
.proc initVideoForGame
.a16
.i16
save_paxy
; BG configuration
set_a8
.a8
; Set BG tile size(Upper 4bits [BG4321])
; Specify BGMode MODE1={16/16/4/0} colors
lda #$39 ; order change bit enabled
sta $2105 ; <- SSSSPMMM (chip Size, Priority change, screen Mode)
; BG1 Size = 32x32 tiles
; Map start = +6800W
; * Tile area = 2048(0x800h) bytes
lda kMap1StartHi
sta $2107 ; <- AAAAAASS
; BG2 Size = 32x32 tiles
; Map start = +7000W
; * Tile area = 2048(0x800h) bytes
lda kMap2StartHi
sta $2108
; BG3 Size = 32x32 tiles
; Map start = +7800W
; * Tile area = 2048(0x800h) bytes
lda kMap3StartHi
sta $2109
; sta $2108 ; BG2 map/size
; BG 1/2 Pattern Source Start(0)
; $0000W-$3FFFW (32KB)
stz $210b
; BG 3 Pattern Source Start(6*0x2000 B)=$6000W + 2048B
lda #$06
sta $210c
set_a16
.a16
restore_paxy
rts
.endproc
; A16, I16
.proc initVideoForMode7
.a16
.i16
save_paxy
; BG configuration
set_a8
.a8
lda #$00
sta pM7FillConfig
lda #$07
sta $2105 ; <- SSSSPMMM (chip Size, Priority change, screen Mode)
; init transform
lda #1
stz $211B
sta $211B
stz $211E
sta $211E
; ^^^ note: HIGH BYTE=Int part thus 1.0 = 0100h
stz $211C
stz $211C
stz $211D
stz $211D
; BG 1 map area start
lda #$71 ; map 7000h- , 64x32
sta $2107 ; <- AAAAAASS
; BG 1 Pattern Source Start($6000W)
lda #$06
sta $210B
set_a16
.a16
restore_paxy
rts
.endproc
; ◆ VRAM直接クリア
; in A: Dest address(W)
; in Y: Amount
; A16, I16
.proc clearVRAMDirect
.a16
.i16
save_paxy
sta pVWriteAddrW
lp:
stz pVWriteValW
dey
bne lp
restore_paxy
rts
.endproc
; ◆ 全画面表示オフ
; A16, I16
.proc disableScreen
.a16
.i16
php
pha
set_a8
.a8
lda #$80
sta $2100
set_a16
.a16
pla
plp
rts
.endproc
; ◆ 全画面表示オン＋輝度設定
; A16, I16
; in X: brightness(1-15)
.proc enableScreensWithBrightness
.a16
.i16
save_paxy
set_a8
.a8
; vvvvv CONFIGURE HERE
; flags = [X][X][X][SP] [BG4][BG3][BG2][BG1]
; lda #%00010111 ; BG1+2+3+SP
lda #%00010001 ; BG1+SP
sta pScrsEnabled ; Main screen
stz $212d ; Sub screen (0=all off)
; brightness
txa
and #$0f
sta $2100
set_a16
.a16
restore_paxy
rts
.endproc
; A16, I16
; in X: brightness(1-15)
.proc enableBG2WithBrightness
.a16
.i16
save_paxy
set_a8
.a8
; vvvvv CONFIGURE HERE
; flags = [X][X][X][SP] [BG4][BG3][BG2][BG1]
lda #%00000010 ; BG2
sta pScrsEnabled ; Main screen
stz $212d ; Sub screen (0=all off)
; brightness
txa
and #$0f
sta $2100
set_a16
.a16
restore_paxy
rts
.endproc
; in A: brightness(0-15)
.proc setScreenBrightness
.a16
.i16
save_pa
set_a8
.a8
and #$0f
sta $2100
set_a16
.a16
restore_pa
rts
.endproc
; ◆ NMI(VBLANK割り込み)有効化
; A16, I16
.proc enableNMI
.a16
.i16
pha
set_a8
.a8
lda #$81 ; bit 0 is always on (Joy pad auto read)
sta $4200
set_a16
.a16
pla
rts
.endproc
; ◆ NMI(VBLANK割り込み)停止
; A16, I16
.proc disableNMI
.a16
.i16
pha
set_a8
.a8
lda #$01
sta $4200
set_a16
.a16
pla
rts
.endproc
; ◆パレット転送
; A16, I16
; in X: Palette select
; in Y: Dest offset (in words)
; Note: each palette entry is 16bit(1W/2B)
.proc transferPaletteData
.a16
.i16
save_paxy
; X <- X*32
txa
left_shift_5
tax
set_a8
.a8
; Set write position
tya
sta $2121
ldy #32 ; Loop 32 times (2*16)
: lda f:PaletteBase, x
sta $2122
inx
dey
bne :-
set_a16
.a16
restore_paxy
rts
.endproc
; ◆パレットバルク転送
; A16, I16
; in X: Palette select
; in Y: Dest offset (in words)
; Note: each palette entry is 16bit(1W/2B)
.proc transferPaletteDataBulk8
.a16
.i16
save_paxy
; X <- X*32
txa
left_shift_5
tax
set_a8
.a8
; Set write position
tya
sta $2121
ldy #32*8 ; Loop 32 times (2*16)
: lda f:PaletteBase, x
sta $2122
inx
dey
bne :-
set_a16
.a16
restore_paxy
rts
.endproc
; ◆VRAMデータDMA転送
; A16, I16
; in X: Dest word address
; in Y: Size (in BYTES)
.proc transferBitmapDataDMA
.a16
.i16
save_paxy
; Set dest VRAM address
stx $2116
; Set length(bytes)
sty pDMA0ByteCountW
; load address(long)
lda gAssetBankTemp
ldy gAssetOffsetTemp
set_a8
.a8
; Set DMA source address
sta pDMA0SourceBank ; bank (8bit)
sty pDMA0SourceOffsetW ; offset(16bit)
; Set DMA target
; write to $2118(VRAM channel)
lda #$18
sta pDMA0Dest
; Write a word
lda #$01
sta pDMA0Config
; Start - - - - - - - - - - - - -
lda #$01
sta pDMATrigger
set_a16
.a16
restore_paxy
rts
.endproc
; ◆スクロール位置初期化
; A16, I16
.proc resetScroll
.a16
.i16
save_pa
; BGにスクロール適用
set_a8
.a8
; FRONT
lda #$00
sta pScrollX0
sta pScrollX0
sta pScrollY0
sta pScrollY0
; BACK
sta pScrollX1
sta pScrollX1
sta pScrollY1
sta pScrollY1
; TEXT
sta pScrollY2
sta pScrollY2
set_a16
.a16
restore_pa
rts
.endproc
; A16, I16
.proc forceStopHDMA
.a16
.i16
save_pa
set_a8
.a8
stz pHDMATrigger
set_a16
.a16
restore_pa
rts
.endproc