initial commit

2026-07-18 20:34:55 +02:00
commit 59ad004c96
474 changed files with 226635 additions and 0 deletions
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+#ifndef NES_NES_H
+#define NES_NES_H
+
+#include <c64/types.h>
+
+#define PPU_CTRL_NT_2000	0b00000000
+#define PPU_CTRL_NT_2400	0b00000001
+#define PPU_CTRL_NT_2800	0b00000010
+#define PPU_CTRL_NT_2C00	0b00000011
+#define PPU_CTRL_INC_1		0b00000000
+#define PPU_CTRL_INC_32		0b00000100
+#define PPU_CTRL_SPR_0000	0b00000000
+#define PPU_CTRL_SPR_1000	0b00001000
+#define PPU_CTRL_BG_0000	0b00000000
+#define PPU_CTRL_BG_1000	0b00010000
+#define PPU_CTRL_SPR_8X8	0b00000000
+#define PPU_CTRL_SPR_8X16	0b00100000
+#define PPU_CTRL_NMI		0b10000000
+
+#define PPU_MASK_GREYSCALE	0b00000001
+#define PPU_MASK_BG8		0b00000010
+#define PPU_MASK_SPR8		0b00000100
+#define PPU_MASK_BG_ON		0b00001000
+#define PPU_MASK_SPR_ON		0b00010000
+#define PPU_MASK_EM_RED		0b00100000
+#define PPU_MASK_EM_GREEN	0b01000000
+#define PPU_MASK_EM_BLUE	0b10000000
+
+struct PPU
+{
+	volatile byte	control;
+	volatile byte	mask;
+	volatile byte	status;
+	volatile byte	oamaddr;
+	volatile byte	oamdata;
+	volatile byte	scroll;
+	volatile byte	addr;
+	volatile byte	data;	
+};
+
+#define ppu	(*((struct PPU *)0x2000))
+
+struct NESIO
+{
+	volatile byte	sq1_volume;
+	volatile byte	sq1_sweep;
+	volatile word	sq1_freq;
+
+	volatile byte	sq2_volume;
+	volatile byte	sq2_sweep;
+	volatile word	sq2_freq;
+
+	volatile byte	tri_volume;
+	volatile byte	tri_pad;
+	volatile word	tri_freq;
+
+	volatile byte	noise_volume;
+	volatile byte	noise_pad;
+	volatile word	noise_freq;
+
+	volatile byte	dmc_freq;
+	volatile byte	dmc_raw;
+	volatile byte	dmc_start;
+	volatile byte	dmc_length;
+
+	volatile byte	oamdma;
+	volatile byte	channels;
+	volatile byte	input[2];
+};
+
+#define nesio	(*((struct NESIO *)0x4000))
+
+#pragma compile("nes.c")
+
+#endif
+