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 C64_VIC_H
+#define C64_VIC_H
+
+#include "types.h"
+
+#define VIC_CTRL1_RSEL	0x08
+#define VIC_CTRL1_DEN	0x10
+#define VIC_CTRL1_BMM	0x20
+#define VIC_CTRL1_ECM	0x40
+#define VIC_CTRL1_RST8	0x80
+
+#define VIC_CTRL2_CSEL	0x08
+#define VIC_CTRL2_MCM	0x10
+#define VIC_CTRL2_RES	0x20
+
+#define VIC_INTR_RST	0x01
+#define VIC_INTR_MBC	0x02
+#define VIC_INTR_MMC	0x04
+#define VIC_INTR_ILP	0x08
+#define VIC_INTR_IRQ	0x80
+
+enum VICColors
+{
+	VCOL_BLACK,
+	VCOL_WHITE,
+	VCOL_RED,
+	VCOL_CYAN,
+	VCOL_PURPLE,
+	VCOL_GREEN,
+	VCOL_BLUE,
+	VCOL_YELLOW,
+
+	VCOL_ORANGE,
+	VCOL_BROWN,
+	VCOL_LT_RED,
+	VCOL_DARK_GREY,
+	VCOL_MED_GREY,
+	VCOL_LT_GREEN,
+	VCOL_LT_BLUE,
+	VCOL_LT_GREY
+};
+
+struct VIC
+{
+	struct XY
+	{
+		volatile byte	x, y;
+	}	spr_pos[8];
+	byte	spr_msbx;
+
+	volatile byte	ctrl1;
+	volatile byte	raster;
+	volatile byte	lpx, lpy;
+	volatile byte	spr_enable;
+	volatile byte	ctrl2;
+	volatile byte	spr_expand_y;
+	volatile byte	memptr;
+	volatile byte	intr_ctrl;
+	volatile byte	intr_enable;
+	volatile byte	spr_priority;
+	volatile byte	spr_multi;
+	volatile byte	spr_expand_x;
+	volatile byte	spr_sprcol;
+	volatile byte	spr_backcol;
+	volatile byte	color_border;
+	volatile byte	color_back;
+	volatile byte	color_back1;
+	volatile byte	color_back2;
+	volatile byte	color_back3;
+	volatile byte	spr_mcolor0;
+	volatile byte	spr_mcolor1;
+	volatile byte	spr_color[8];
+
+	volatile byte	ext_keymap;
+	volatile byte	ext_2mhz;
+	volatile byte	ext_uturbo;
+};
+
+// set the 16k Bank for the vic
+// 0 : 0x0000..0x3fff
+// 1 : 0x4000..0x7fff
+// 2 : 0x8000..0xbfff
+// 3 : 0xc000..0xffff
+void vic_setbank(char bank);
+
+enum VicMode
+{
+	VICM_TEXT,
+	VICM_TEXT_MC,
+	VICM_TEXT_ECM,
+	VICM_HIRES,
+	VICM_HIRES_MC
+};
+
+// set the display mode and base address. This will also
+// adapt the bank.
+void vic_setmode(VicMode mode, const char * text, const char * font);
+
+// put a sprite at the given x/y location, taking care of the
+// x MSB
+inline void vic_sprxy(byte s, int x, int y);
+
+// Read the sprite x position from the LSB and MSB register
+inline int vic_sprgetx(byte s);
+
+// wait for the beam to reach the bottom of the visual area
+inline void vic_waitBottom(void);
+
+// wait for the beam to reach the top of the frame
+inline void vic_waitTop(void);
+
+// wait for the top of the frame and then for the bottom of the visual area
+inline void vic_waitFrame(void);
+
+// return true if the beam is below the frame
+inline bool vic_isBottom(void);
+
+// wait for n frames
+void vic_waitFrames(char n);
+
+// wait for a specific raster line
+void vic_waitLine(int line);
+
+// wait for beam to be below a line
+void vic_waitBelow(int line);
+
+// wait for beam to be in a given range on screen
+void vic_waitRange(char below, char above);
+
+// reference to the VIC chip
+#define vic	(*((struct VIC *)0xd000))
+
+#pragma compile("vic.c")
+
+#endif