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Working on lazynes.

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This commit is contained in:
jespergravgaard 2020-07-06 23:58:44 +02:00
parent 7384fb5357
commit 1852630b16
3 changed files with 98 additions and 65 deletions
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2
src/main/fragment/cache/fragment-cache-mos6502.asm vendored
View File

@ -1,4 +1,4 @@
//KICKC FRAGMENT CACHE 160b017651
//KICKC FRAGMENT CACHE 160b015f22
//FRAGMENT vbuz1=vbuc1
lda #{c1}
sta {z1}

94
src/main/fragment/cache/fragment-cache-mos6502x.asm vendored
View File

@ -1,4 +1,4 @@
//KICKC FRAGMENT CACHE 160b017651
//KICKC FRAGMENT CACHE 160b015f22
//FRAGMENT vbuz1=vbuc1
lda #{c1}
sta {z1}
@ -8562,6 +8562,52 @@ sty {z1}
//FRAGMENT _deref_pbsc1=vbsc2
lda #{c2}
sta {c1}
//FRAGMENT vbuz1=_dec_vbuz2
ldy {z2}
dey
sty {z1}
//FRAGMENT vbuz1=_dec_vbuaa
sec
sbc #1
sta {z1}
//FRAGMENT vbuz1=_dec_vbuxx
dex
stx {z1}
//FRAGMENT vbuz1=_dec_vbuyy
dey
sty {z1}
//FRAGMENT vbuaa=_dec_vbuz1
lda {z1}
sec
sbc #1
//FRAGMENT vbuaa=_dec_vbuxx
txa
sec
sbc #1
//FRAGMENT vbuaa=_dec_vbuyy
tya
sec
sbc #1
//FRAGMENT vbuxx=_dec_vbuz1
ldx {z1}
dex
//FRAGMENT vbuxx=_dec_vbuaa
tax
dex
//FRAGMENT vbuxx=_dec_vbuyy
tya
tax
dex
//FRAGMENT vbuyy=_dec_vbuz1
ldy {z1}
dey
//FRAGMENT vbuyy=_dec_vbuaa
tay
dey
//FRAGMENT vbuyy=_dec_vbuxx
txa
tay
dey
//FRAGMENT vwuz1=vwuz2_bor_vbuz3
lda {z3}
ora {z2}
@ -17737,49 +17783,3 @@ sta {c1},x
lda #{c2}
ora {c1},y
sta {c1},y
//FRAGMENT vbuz1=_dec_vbuz2
ldy {z2}
dey
sty {z1}
//FRAGMENT vbuz1=_dec_vbuaa
sec
sbc #1
sta {z1}
//FRAGMENT vbuz1=_dec_vbuxx
dex
stx {z1}
//FRAGMENT vbuz1=_dec_vbuyy
dey
sty {z1}
//FRAGMENT vbuaa=_dec_vbuz1
lda {z1}
sec
sbc #1
//FRAGMENT vbuaa=_dec_vbuxx
txa
sec
sbc #1
//FRAGMENT vbuaa=_dec_vbuyy
tya
sec
sbc #1
//FRAGMENT vbuxx=_dec_vbuz1
ldx {z1}
dex
//FRAGMENT vbuxx=_dec_vbuaa
tax
dex
//FRAGMENT vbuxx=_dec_vbuyy
tya
tax
dex
//FRAGMENT vbuyy=_dec_vbuz1
ldy {z1}
dey
//FRAGMENT vbuyy=_dec_vbuaa
tay
dey
//FRAGMENT vbuyy=_dec_vbuxx
txa
tay
dey

67
src/test/kc/complex/lazynes/lazynes.c
View File

@ -58,6 +58,17 @@ struct SpriteData align(0x100) SPRITE_BUFFER[0x40];
// Index of the next SpriteData in SPRITE_BUFFER to write to in lnAddSpr()
volatile char add_sprite_idx;
// Counts the vblanks between syncs
volatile char vblank_count;
// The current mode set by lnSync.
// lfBlank = 1, activates blank mode, blanks screen and allows lnPush() calls
// lfSplit = 2 activates split mode, NMI waits for SPR0HIT and sets registers
volatile char sync_mode;
// Signal when vblank occurs. The NMI sets this to zero. To wait for a vblank set this no non-zero and wait for it to become zero.
volatile char vblank_signal;
// NMI Called when the PPU refreshes the screen (also known as the V-Blank period)
interrupt(hardware_stack) void vblank() {
// DMA transfer the entire sprite buffer to the PPU
@ -65,36 +76,58 @@ interrupt(hardware_stack) void vblank() {
// Set scroll
PPU->PPUSCROLL = 0;
PPU->PPUSCROLL = 0;
// move all sprites off the screen
//for(char i=0;i!=0x40;i++)
// SPRITE_BUFFER[i].y = 0xff;
// Reset the index of sprites to add
add_sprite_idx = 0;
// count vblanks
vblank_count++;
// send vblank signal
vblank_signal = 0;
}
// Wait for next vblank
// flags: 0, lfBlank or lfSplit (see below)
// result: Amount of frames since last sync [0..31], 128 is added on NTSC
//
// lfBlank = 0, disables blank mode (if set), wait for vblank
// lfBlank = 1, activates blank mode, blanks screen and allows lnPush() calls
// lfSplit = 2 activates split mode, NMI waits for SPR0HIT and sets registers
ubyte lnSync(ubyte flags) {
// Enable video output if lfBlank not set
// Is video output enabled (lfBlank==0)
if(!(flags&lfBlank)) {
// Set sprite tileset to upper - enable vblank NMI
PPU->PPUCTRL = 0b10001000;
// Enable sprite and tile rendering
PPU->PPUMASK = 0b00011110;
// Move remaining sprites off the screen
for(char i=add_sprite_idx;i!=0x40;i++)
SPRITE_BUFFER[i].y = 0xff;
// Reset add sprite index
add_sprite_idx = 0;
// Enable video output (if it was disabled)
if(sync_mode&lfBlank) {
// Set sprite tileset to upper - enable vblank NMI
PPU->PPUCTRL = 0b10001000;
// Enable sprite and tile rendering
PPU->PPUMASK = 0b00011110;
}
}
// Wait for V-Blank signal from the NMI (if vblank is currently enabled)
if(!(sync_mode&lfBlank)) {
vblank_signal = 0xff;
while(vblank_signal) ;
}
// Wait for V-Blank
waitForVBlank();
// Disable video output if lfBlank set
if(flags&lfBlank)
if(flags&lfBlank) {
// lfBlank = 1, activates blank mode, blanks screen and allows lnPush() calls
disableVideoOutput();
// Disable vertical blank interrupt
PPU->PPUCTRL = 0;
// Disable sprite rendering
PPU->PPUMASK = 0;
}
// Update the mode
sync_mode = flags;
// TODO: Handle lfSplit = 2 : activates split mode, NMI waits for SPR0HIT and sets registers
// TODO: Count frames
return 0;
// Return number of vblank since last sync
char res = vblank_count;
vblank_count = 0;
return res;
}
// Write data into nametables, palettes, CHRRAM, etc.