initial commit

oscar64/samples/memmap/charsetcopy.c

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+#include <c64/vic.h>
+#include <c64/memmap.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+// make space until 0xcc00 by extending the default region
+
+#pragma region( main, 0x0a00, 0xcc00, , , {code, data, bss, heap, stack} )
+
+// space for our custom charset from c000 to c800, will be copied to
+// 0xd000 during startup to free space for stack and heap
+
+#pragma section( charset, 0)
+
+#pragma region( charset, 0xc000, 0xc800, , , {charset} )
+
+// set initialized data segment to charset section
+
+#pragma data(charset)
+
+char charset[2048] = {
+	#embed "../resources/charset.bin"
+};
+
+// back to normal
+
+#pragma data(data)
+
+// pointers to charset and screen in memory
+
+#define Screen	((char *)0xcc00)
+#define Charset	((char *)0xd000)
+
+int main(void)
+{
+	// Install the trampoline
+	mmap_trampoline();
+
+	// make all of RAM visible to the CPU
+	mmap_set(MMAP_RAM);
+
+	// copy the font
+	memcpy(Charset, charset, 2048);
+
+	// make lower part of RAM visible to CPU
+	mmap_set(MMAP_NO_BASIC);
+
+	// map the vic to the new charset
+
+	vic_setmode(VICM_TEXT, Screen, Charset);
+
+	for(int i=0; i<1000; i++)
+		Screen[i] = (char)i;
+
+	// wait for keypress
+
+	getchar();
+
+	// restore VIC
+
+	vic_setmode(VICM_TEXT, (char *)0x0400, (char *)0x1000);
+
+	// restore basic ROM
+	mmap_set(MMAP_ROM);
+
+    return 0;
+}
+