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_REU_H
+#define C64_REU_H
+
+#include "types.h"
+
+#define REU_STAT_IRQ		0x80
+#define REU_STAT_EOB		0x40
+#define REU_STAT_FAULT		0x20
+#define REU_STAT_SIZE		0x10
+#define REU_STAT_VERSION	0x0f
+
+#define REU_CTRL_FIXL		0x80
+#define REU_CTRL_FIXR		0x40
+#define REU_CTRL_INCL		0x00
+#define REU_CTRL_INCR		0x00
+
+#define REU_IRQ_ENABLE		0x80
+#define REU_IRQ_EOB			0x40
+#define REU_IRQ_FAULT		0x20
+
+#define REU_CMD_EXEC		0x80
+#define REU_CMD_AUTO		0x20
+#define REU_CMD_FF00		0x10
+#define REU_CMD_STORE		0x00
+#define REU_CMD_LOAD		0x01
+#define REU_CMD_SWAP		0x02
+#define REU_CMD_VERIFY		0x03
+
+struct REU
+{
+	volatile byte			status;
+	volatile __memmap byte	cmd;
+
+	volatile word			laddr;
+	volatile word			raddr;
+	volatile byte			rbank;
+
+	volatile word			length;
+
+	volatile byte			irqmask;
+	volatile byte			ctrl;
+};
+
+
+#define reu 	(*((struct REU *)0xdf00))
+
+// Count the number of 64k pages in the REU, the test is destructive
+int reu_count_pages(void);
+
+// Copy an array of data from C64 memory to the REU memory
+inline void reu_store(unsigned long raddr, const volatile char * sp, unsigned length);
+
+// Copy an array of data from REU memory to the C64 memory
+inline void reu_load(unsigned long raddr, volatile char * dp, unsigned length);
+
+// Fill an array of data in the REU with a single value
+inline void reu_fill(unsigned long raddr, char c, unsigned length);
+
+// Copy a 2D array from REU memory to the C64 memory.  The stride parameter 
+// is the distance of two rows in REU memory
+inline void reu_load2d(unsigned long raddr, volatile char * dp, char height, unsigned width, unsigned stride);
+
+
+inline void reu_load2dpage(unsigned long raddr, volatile char * dp, char height, unsigned width, unsigned stride);
+
+#pragma compile("reu.c")
+
+#endif