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updated nes presets

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This commit is contained in:
Steven Hugg 2019-04-09 10:24:23 -04:00
parent 78d83e0a20
commit b2264d75cf
6 changed files with 39 additions and 34 deletions
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8
presets/nes/ex1.asm
View File

@ -80,10 +80,10 @@ NMIHandler:
Palette:
hex 1f ;screen color
hex 09092c00 ;background 0
hex 09091900 ;background 1
hex 09091500 ;background 2
hex 09092500 ;background 3
hex 01112100 ;background 0
hex 02122200 ;background 1
hex 02112100 ;background 2
hex 01122200 ;background 3
;;;;; CPU VECTORS

18
presets/nes/ex2.asm
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@ -40,10 +40,9 @@ Start:
; fill video RAM
FillVRAM: subroutine
PPU_SETADDR $2000
ldy #$10 ; set $10 pages ($1000 bytes)
ldy #$8 ; set $8 pages ($800 bytes)
.loop:
tya ; Y -> A
ora #$40 ; A = A OR $40
lda PageData,y ; A -> PageData[Y]
sta PPU_DATA ; A -> PPU data port
inx ; X = X + 1
bne .loop ; repeat until 256 bytes
@ -51,6 +50,11 @@ FillVRAM: subroutine
bne .loop ; repeat until Y is 0
rts ; return to caller
PageData:
hex 00
hex 42424242 ; 'B'
hex 41414141 ; 'A'
; set palette colors
SetPalette: subroutine
PPU_SETADDR $3f00
@ -97,10 +101,10 @@ NMIHandler:
Palette:
hex 1f ;screen color
hex 09092c00 ;background 0
hex 09091900 ;background 1
hex 09091500 ;background 2
hex 09092500 ;background 3
hex 01112100 ;background 0
hex 02122200 ;background 1
hex 02112100 ;background 2
hex 01122200 ;background 3
;;;;; CPU VECTORS

16
presets/nes/ex3.asm
View File

@ -132,14 +132,14 @@ NMIHandler:
Palette:
hex 1f ;screen color
hex 09092c00 ;background 0
hex 09091900 ;background 1
hex 09091500 ;background 2
hex 09092500 ;background 3
hex 14243400 ;sprite 0
hex 15253500 ;sprite 1
hex 16263600 ;sprite 2
hex 17273700 ;sprite 3
hex 01112100 ;background 0
hex 02122200 ;background 1
hex 02112100 ;background 2
hex 01122200 ;background 3
hex 19293900 ;sprite 0
hex 1a2a3a00 ;sprite 1
hex 1b2b3b00 ;sprite 2
hex 1c2c3c00 ;sprite 3
;;;;; CPU VECTORS

16
presets/nes/ex4.asm
View File

@ -102,14 +102,14 @@ ScrollDirTab:
align $100
Palette:
hex 1f ;background
hex 09090000 ;bg0
hex 09090c00 ;bg1
hex 09091c00 ;bg2
hex 09092c00 ;bg3
hex 14243400 ;sp0
hex 15253500 ;sp1
hex 16263600 ;sp2
hex 17273700 ;sp3
hex 01112100 ;background 0
hex 02122200 ;background 1
hex 02112100 ;background 2
hex 01122200 ;background 3
hex 19293900 ;sprite 0
hex 1a2a3a00 ;sprite 1
hex 1b2b3b00 ;sprite 2
hex 1c2c3c00 ;sprite 3
;;;;; CPU VECTORS

8
presets/nes/hello.c
View File

@ -16,15 +16,15 @@ void put_str(unsigned int adr, const char *str) {
// main function, run after console reset
void main(void) {
// set palette colors
pal_col(1,0x04);
pal_col(0,0x02);
pal_col(1,0x14);
pal_col(2,0x20);
pal_col(3,0x30);
// write text to name table
put_str(NTADR_A(2,2),"HELLO, WORLD!");
put_str(NTADR_A(2,4),"THIS CODE PRINTS SOME TEXT");
put_str(NTADR_A(2,5),"USING ASCII-ENCODED CHARACTER");
put_str(NTADR_A(2,6),"SET WITH CAPITAL LETTERS ONLY");
put_str(NTADR_A(2,4),"Hello, World!");
put_str(NTADR_A(2,6),"\x14 \x15 \x16 \x17 \x18 \x19");
// enable PPU rendering (turn on screen)
ppu_on_all();

7
presets/nes/horizmask.c
View File

@ -42,7 +42,8 @@ void new_building() {
}
void update_nametable() {
word addr;
register word addr;
// a buffer drawn to the nametable vertically
char buf[PLAYROWS];
// divide x_scroll by 8
// to get nametable X position
@ -51,7 +52,6 @@ void update_nametable() {
addr = NTADR_A(x, 4);
else
addr = NTADR_B(x&31, 4);
// create vertical slice
// clear empty space
memset(buf, 0, PLAYROWS-bldg_height);
// draw a random star
@ -91,9 +91,10 @@ void scroll_demo() {
update_nametable();
}
// manually force vram update
// flush and clear VRAM buffer after NMI
ppu_wait_nmi();
flush_vram_update(updbuf);
vrambuf_end();
vrambuf_clear();
// reset ppu address
vram_adr(0x0);
// set scroll register