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https://github.com/sehugg/8bitworkshop.git
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75 lines
1.6 KiB
C
75 lines
1.6 KiB
C
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/*
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Demonstrates the PPU's tint and monochrome bits.
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Use the controller to see different combinations.
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*/
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#include <stdlib.h>
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#include <string.h>
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// include NESLIB header
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#include "neslib.h"
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// link the pattern table into CHR ROM
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//#link "chr_generic.s"
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/*{pal:"nes",layout:"nes"}*/
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const char PALETTE[32] = {
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0x2D, // screen color
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0x00,0x30,0x30,0x00, // background palette 0
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0x0C,0x20,0x2C,0x00, // background palette 1
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0x14,0x10,0x25,0x00, // background palette 2
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0x17,0x16,0x28,0x00, // background palette 3
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0x16,0x35,0x24,0x00, // sprite palette 0
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0x00,0x37,0x25,0x00, // sprite palette 1
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0x0D,0x2D,0x3A,0x00, // sprite palette 2
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0x0D,0x27,0x2A // sprite palette 3
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};
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// setup PPU and tables
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void setup_graphics() {
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// clear sprites
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oam_clear();
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// set palette colors
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pal_all(PALETTE);
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}
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void main(void)
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{
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byte i;
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setup_graphics();
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// draw message
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for (i=0; i<30; i++) {
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vram_adr(NTADR_A(1,i));
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// vram_write("\x18\x18 USE CONTROLLER FOR TINT \x18\x18\x18", 30);
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vram_write(" A:red B:green \x1e\x1f:blue \x1c\x1d:mono", 30);
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}
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// attributes
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vram_adr(0x23c0);
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vram_fill(0x00, 8);
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vram_fill(0x55, 8);
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vram_fill(0xaa, 8);
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vram_fill(0xff, 8);
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vram_fill(0x11, 8);
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vram_fill(0x33, 8);
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vram_fill(0xdd, 8);
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// enable rendering
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ppu_on_all();
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// infinite loop
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while(1) {
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byte pad = pad_poll(0);
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byte mask = MASK_BG;
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if (pad & PAD_A)
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mask |= MASK_TINT_RED;
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if (pad & PAD_B)
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mask |= MASK_TINT_GREEN;
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if (pad & (PAD_LEFT|PAD_RIGHT))
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mask |= MASK_TINT_BLUE;
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if (pad & (PAD_UP|PAD_DOWN))
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mask |= MASK_MONO;
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ppu_mask(mask);
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}
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}
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