Apple-2gs-SW/iigs-game-engine
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Initial palette work; fix memory init bug

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This commit is contained in:
Lucas Scharenbroich 2023-05-16 22:38:54 -05:00
parent cb13c2ae2d
commit 25c82cc44b
5 changed files with 127 additions and 14 deletions
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22
demos/smb/Main.s
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@ -327,7 +327,6 @@ CopyNametable
asl
asl
; lda #$0000+{2*32}
sta Tmp2
lda #0
sta Tmp3
@ -414,6 +413,13 @@ triggerNMI
native_joy ENT
db 0,0
; X = address in the rom file
; A = address to write
;
; This keeps the tile in 2-bit mode in a format that makes it easy to look up pixel data
; based on a dynamic palette selection
; X = address in the rom file
; A = address to write
@ -571,10 +577,16 @@ DLUT dw $00,$01,$10,$11 ; CHR_ROM[0] = xx, CHR_ROM[8] = 00
dw $20,$21,$30,$31 ; CHR_ROM[0] = xx, CHR_ROM[8] = 10
dw $22,$23,$32,$33 ; CHR_ROM[0] = xx, CHR_ROM[8] = 11
MLUT dw $FF,$F0,$0F,$00
dw $F0,$F0,$00,$00
dw $0F,$00,$0F,$00
dw $00,$00,$00,$00
;MLUT dw $FF,$F0,$0F,$00
; dw $F0,$F0,$00,$00
; dw $0F,$00,$0F,$00
; dw $00,$00,$00,$00
; Inverted mask for using eor/and/eor rendering
MLUT dw $00,$0F,$F0,$FF
dw $0F,$0F,$FF,$FF
dw $F0,$FF,$F0,$FF
dw $FF,$FF,$FF,$FF
; Extracted tiles
TileBuff ds 128

13
demos/smb/ppu.s
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@ -442,6 +442,7 @@ x_offset equ 16
drawOAMSprites
:tmp equ 238
phb
php
@ -456,6 +457,10 @@ drawOAMSprites
cmp #241
bcs :hidden
lda PPU_OAM+1,x ; $FC is an empty tile, don't draw it
cmp #$FC
beq :hidden
lda PPU_OAM,x ; Y-coordinate
cmp #200+y_offset-9
bcs :hidden
@ -486,6 +491,7 @@ drawOAMSprites
tay
lda PPU_OAM+2,x
pha
bit #$0040 ; horizontal flip
bne :hflip
@ -493,7 +499,7 @@ drawOAMSprites
and #$FF00
lsr ; multiple by 128
tax
bra drawTilePatch
bra :noflip
:hflip
lda PPU_OAM,x ; Loda the tile index into the high byte (x256)
@ -502,10 +508,13 @@ drawOAMSprites
adc #64 ; horizontal flip
tax
:noflip
pla
and #$0080 ; Set the vflip bit
drawTilePatch
jsl $000000 ; Draw the tile on the graphics screen
:hop
sep #$30
plx

23
demos/smb/rom.s
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@ -682,10 +682,22 @@ PPUDATA_WRITE EXT
PPUDMA_WRITE EXT
ROMBase ENT
ds $8000-14-50
ds $8000-14-50-14
; Hooks to call back to the GTE harness for PPU memory-mapped accesses
mx %11
mx %11
GteInitMem
php
rep #$30
ldx #$015E
GteLoop stz 00,x
dex
dex
bpl GteLoop
plp
rts
mx %11
PPU_CTRL_W
jsl PPUCTRL_WRITE
rts
@ -2870,8 +2882,11 @@ SkipByte dey
cpy #$ff ;do this until all bytes in page have been erased
bne InitByteLoop
dex ;go onto the next page
bpl InitPageLoop ;do this until all pages of memory have been erased
rts
cpx #$02 ;GTE wrapper -- zero page and stack are in a different
bcs InitPageLoop ;bank, so we provide a little help here
; bpl InitPageLoop ;do this until all pages of memory have been erased
jmp GteInitMem
;-------------------------------------------------------------------------------------

81
src/SpriteRender.s
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@ -137,11 +137,59 @@ RTL_OPCODE equ $6B
lda :rtnval ; Address in the compile memory
rts
; 4 palettes for the sprite data. Converts 4 pixels at a time from 0000 0000w wxxy yzz0 -> gggg hhhh iiii jjjj
; each swizzle table is 512 bytes long, 2048 bytes for all four. They need to be prec
swizzle
; Draw a tile directly to the graphics screen as a sprite
;
; Y = screen address
; X = tile address
; A = $0001 = ignore mask
; = $0080 = vflip
; = $0600 = palette select
* _DrawSwizzleTileToScreen
* :palette equ 240
* ; Tile data must be 0000 000w wxxy yzz0
* ; Tile mask is normal pixel data
* and #$0600
* sta :palette ; cache the palette bits
* lda #^swizzle
* sta tmp+2
* ldal tiledata+{]line*4},x
* ora :palette
* sta tmp
* lda: {]line*SHR_LINE_WIDTH},y
* andl tiledata+{]line*4}+32,x
* ora [tmp]
* sta: {]line*SHR_LINE_WIDTH},y
* tay
* lda swizzle,y
* phb
* pea $0101
* plb
* plb
* ]line equ 0
* lup 8
* lda: {]line*SHR_LINE_WIDTH}+2,y
* andl tiledata+{]line*4}+32+2,x
* oral tiledata+{]line*4}+2,x
* sta: {]line*SHR_LINE_WIDTH}+2,y
* lda: {]line*SHR_LINE_WIDTH},y
* andl tiledata+{]line*4}+32,x
* oral tiledata+{]line*4},x
* sta: {]line*SHR_LINE_WIDTH},y
* ]line equ ]line+1
* --^
* plb
* rtl ; special exit
_DrawTileToScreen
phb
@ -149,15 +197,44 @@ _DrawTileToScreen
plb
plb
bit #$0080
jne _DrawTileToScreenV
]line equ 0
lup 8
lda: {]line*SHR_LINE_WIDTH}+2,y
eorl tiledata+{]line*4}+2,x
eor #$8888
andl tiledata+{]line*4}+32+2,x
oral tiledata+{]line*4}+2,x
eor: {]line*SHR_LINE_WIDTH}+2,y
sta: {]line*SHR_LINE_WIDTH}+2,y
lda: {]line*SHR_LINE_WIDTH},y
eorl tiledata+{]line*4},x
eor #$8888
andl tiledata+{]line*4}+32,x
oral tiledata+{]line*4},x
eor: {]line*SHR_LINE_WIDTH},y
sta: {]line*SHR_LINE_WIDTH},y
]line equ ]line+1
--^
plb
rtl ; special exit
_DrawTileToScreenV
]line equ 0
lup 8
lda: {]line*SHR_LINE_WIDTH}+2,y
eorl tiledata+{{7-]line}*4}+2,x
eor #$8888
andl tiledata+{{7-]line}*4}+32+2,x
eor: {]line*SHR_LINE_WIDTH}+2,y
sta: {]line*SHR_LINE_WIDTH}+2,y
lda: {]line*SHR_LINE_WIDTH},y
eorl tiledata+{{7-]line}*4},x
eor #$8888
andl tiledata+{{7-]line}*4}+32,x
eor: {]line*SHR_LINE_WIDTH},y
sta: {]line*SHR_LINE_WIDTH},y
]line equ ]line+1
--^

2
src/blitter/Horz.s
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@ -229,7 +229,7 @@ _ApplyBG0XPos
; Alternate entry point if the virt_line_x2 and lines_left_x2 and XMod164 values are passed in externally
_RestoreBG0OpcodesAlt
_ApplyBG0XPosAlt
:stk_save equ tmp0
:virt_line_x2 equ tmp1
:lines_left_x2 equ tmp2