initial commit

2026-07-18 20:34:55 +02:00
commit 59ad004c96
474 changed files with 226635 additions and 0 deletions
@@ -0,0 +1,166 @@
+#include "vera.h"
+
+void vram_addr(unsigned long addr)
+{
+	vera.ctrl &= ~VERA_CTRL_ADDRSEL;
+	vera.addr = (unsigned)addr;
+	vera.addrh = (char)((addr >> 16) & 1) | 0x10;	
+}
+
+void vram_addr0(unsigned long addr)
+{
+	vera.ctrl &= ~VERA_CTRL_ADDRSEL;
+	vera.addr = (unsigned)addr;
+	vera.addrh = (char)((addr >> 16) & 1) | 0x00;	
+}
+
+void vram_addr2(unsigned long addr)
+{
+	vera.ctrl &= ~VERA_CTRL_ADDRSEL;
+	vera.addr = (unsigned)addr;
+	vera.addrh = (char)((addr >> 16) & 1) | 0x20;	
+}
+
+void vram_put(char data)
+{
+	vera.data0 = data;
+}
+
+void vram_putw(unsigned data)
+{
+	vera.data0 = data & 0xff;
+	vera.data0 = data >> 8;
+}
+
+char vram_get(void)
+{
+	return vera.data0;
+}
+
+unsigned vram_getw(void)
+{
+	unsigned l = vera.data0;
+	unsigned h = vera.data0;
+	return (h << 8) | l;
+}
+
+
+void vram_put_at(unsigned long addr, char data)
+{
+	vram_addr(addr);
+	vram_put(data);
+}
+
+char vram_get_at(unsigned long addr)
+{
+	vram_addr(addr);
+	return vram_get();;
+}
+
+void vram_putn(unsigned long addr, const char * data, unsigned size)
+{
+	vram_addr(addr);
+	while(size > 0)
+	{
+		vram_put(*data++);
+		size--;
+	}
+}
+
+void vram_getn(unsigned long addr, char * data, unsigned size)
+{
+	vram_addr(addr);
+
+	while(size > 0)
+	{
+		*data++ = vram_get();
+		size--;
+	}
+}
+
+void vram_fill(unsigned long addr, char data, unsigned size)
+{
+	vram_addr(addr);
+
+	while(size > 0)
+	{
+		vram_put(data);
+		size--;
+	}
+}
+
+
+void vera_spr_set(char spr, unsigned addr32, VERASpriteMode mode8, VERASpriteSize w, VERASpriteSize h, VERASpritePriority z, char pal)
+{
+	__assume(spr < 128);
+
+	vram_addr(0x1fc00UL + spr * 8);
+	vram_putw(addr32 | (mode8 ? 0x8000 : 0x0000));
+	vram_putw(0);
+	vram_putw(0);
+	vram_put(z << 2);
+	vram_put((h << 6) | (w << 4) | pal);	
+}
+
+void vera_spr_flip(char spr, bool fliph, bool flipv)
+{
+	__assume(spr < 128);
+	
+	vram_addr0(0x1fc00UL + spr * 8 + 6);
+	char b = vram_get() & 0xfc;
+	if (fliph) b |= 0x01;
+	if (flipv) b |= 0x02;
+	vram_put(b);
+}
+
+void vera_spr_move(char spr, int x, int y)
+{
+	__assume(spr < 128);
+
+	vram_addr(0x1fc00UL + spr * 8 + 2);
+	vram_putw(x);
+	vram_putw(y);	
+}
+
+void vera_spr_image(char spr, unsigned addr32)
+{
+	__assume(spr < 128);
+
+	vram_addr(0x1fc00UL + spr * 8);
+	vram_put(addr32 & 0xff);
+	vera.addrh &= 0x0f;
+	char b = vram_get() & 0x80;
+	vram_put((addr32 >> 8) | b);
+}
+
+void vera_pal_put(char index, unsigned color)
+{
+	vram_addr(0x1fa00ul + 2 * index);
+	vram_putw(color);
+}
+
+unsigned vera_pal_get(char index)
+{
+	vram_addr(0x1fa00ul + 2 * index);
+	return vram_getw();
+}
+
+void vera_pal_putn(char index, const unsigned * color, unsigned size)
+{
+	vram_addr(0x1fa00ul + 2 * index);
+	while (size > 0)
+	{
+		vram_putw(*color++);
+		size--;
+	}
+}
+
+void vera_pal_getn(char index, unsigned * color, unsigned size)
+{
+	vram_addr(0x1fa00ul + 2 * index);
+	while (size > 0)
+	{
+		*color++ = vram_getw();
+		size--;
+	}
+}
@@ -0,0 +1,157 @@
+#ifndef CX16_VERA_H
+#define CX16_VERA_H
+
+// Thanks to crisps for providing the initial code for this library
+
+#include <c64/types.h>
+
+#define VERA_ADDRH_DECR		0x08
+#define VERA_ADDRH_INC		0xf0
+
+#define VERA_CTRL_RESET		0x80
+#define VERA_CTRL_DCSEL		0x02
+#define VERA_CTRL_ADDRSEL	0x01
+
+#define VERA_IRQ_LINE_8		0x80
+#define VERA_IRQ_AFLOW		0x08
+#define VERA_IRQ_SPRCOL		0x04
+#define VERA_IRQ_LINE		0x02
+#define VERA_IRQ_VSYNC		0x01
+
+#define VERA_DCVIDEO_MODE_OFF		0x00
+#define VERA_DCVIDEO_MODE_VGA		0x01
+#define VERA_DCVIDEO_MODE_NTSC		0x02
+#define VERA_DCVIDEO_MODE_RGBI		0x03
+
+#define VERA_DCVIDEO_NCHROMA		0x04
+#define VERA_DCVIDEO_LAYER0			0x10
+#define VERA_DCVIDEO_LAYER1			0x20
+#define VERA_DCVIDEO_SPRITES		0x40
+
+#define VERA_LAYER_DEPTH_1		0x00
+#define VERA_LAYER_DEPTH_2		0x01
+#define VERA_LAYER_DEPTH_4		0x02
+#define VERA_LAYER_DEPTH_8		0x03
+
+#define VERA_LAYER_BITMAP		0x04
+#define VERA_LAYER_T256C		0x08
+#define VERA_LAYER_WIDTH_32		0x00
+#define VERA_LAYER_WIDTH_64		0x10
+#define VERA_LAYER_WIDTH_128	0x20
+#define VERA_LAYER_WIDTH_256	0x30
+#define VERA_LAYER_HEIGHT_32	0x00
+#define VERA_LAYER_HEIGHT_64	0x40
+#define VERA_LAYER_HEIGHT_128	0x80
+#define VERA_LAYER_HEIGHT_256	0xc0
+
+#define VERA_TILE_WIDTH_8		0x00
+#define VERA_TILE_WIDTH_16		0x01
+#define VERA_TILE_HEIGHT_8		0x00
+#define VERA_TILE_HEIGHT_16		0x02
+
+
+struct VERA
+{
+	volatile word	addr;
+	volatile byte	addrh;
+	volatile byte	data0, data1;
+
+	volatile byte	ctrl;
+	volatile byte	ien;
+	volatile byte	isr;
+	volatile byte	irqline;
+
+	volatile byte	dcvideo;
+	volatile byte	dchscale;
+	volatile byte	dcvscale;
+	volatile byte	dcborder;
+
+	volatile byte	l0config;
+	volatile byte	l0mapbase;
+	volatile byte	l0tilebase;
+	volatile word	l0hscroll;
+	volatile word	l0vscroll;
+
+	volatile byte	l1config;
+	volatile byte	l1mapbase;
+	volatile byte	l1tilebase;
+	volatile word	l1hscroll;
+	volatile word	l1vscroll;
+
+	volatile byte	audioctrl;
+	volatile byte	audiorate;
+	volatile byte	audiodata;
+
+	volatile byte	spidata;
+	volatile byte	spictrl;
+};
+
+enum VERASpriteMode
+{
+	VSPRMODE_4,
+	VSPRMODE_8
+};
+
+enum VERASpriteSize
+{
+	VSPRSZIZE_8,
+	VSPRSZIZE_16,
+	VSPRSZIZE_32,
+	VSPRSZIZE_64
+};
+
+enum VERASpritePriority
+{
+	VSPRPRI_OFF,
+	VSPRPRI_BACK,
+	VSPRPRI_MIDDLE,
+	VSPRPRI_FRONT
+};
+
+#define VERA_COLOR(r, g, b) (((unsigned)(r) << 8) | ((unsigned)(g) << 4) | (unsigned)(b))
+
+#define vera    (*(VERA *)0x9f20)
+
+inline void vram_addr(unsigned long addr);
+
+inline void vram_addr0(unsigned long addr);
+
+inline void vram_addr2(unsigned long addr);
+
+inline void vram_put(char data);
+
+inline void vram_putw(unsigned data);
+
+inline char vram_get(void);
+
+inline unsigned vram_getw(void);
+
+inline void vram_put_at(unsigned long addr, char data);
+
+inline char vram_get_at(unsigned long addr);
+
+void vram_putn(unsigned long addr, const char * data, unsigned size);
+
+void vram_getn(unsigned long addr, char * data, unsigned size);
+
+void vram_fill(unsigned long addr, char data, unsigned size);
+
+void vera_spr_set(char spr, unsigned addr32, VERASpriteMode mode8, VERASpriteSize w, VERASpriteSize h, VERASpritePriority z, char pal);
+
+void vera_spr_flip(char spr, bool fliph, bool flipv);
+
+void vera_spr_move(char spr, int x, int y);
+
+void vera_spr_image(char spr, unsigned addr32);
+
+void vera_pal_put(char index, unsigned color);
+
+unsigned vera_pal_get(char index);
+
+void vera_pal_putn(char index, const unsigned * color, unsigned size);
+
+void vera_pal_getn(char index, unsigned * color, unsigned size);
+
+#pragma compile("vera.c")
+
+#endif