initial commit

oscar64/samples/memmap/charsetload.c

@@ -0,0 +1,44 @@
+#include <c64/vic.h>
+#include <c64/memmap.h>
+#include <c64/kernalio.h>
+#include <stdio.h>
+
+#define Screen	((char *)0xcc00)
+#define Charset	((char *)0xc000)
+
+int main(void)
+{
+	// Set name for file and open it on drive 9
+	krnio_setnam("CHARSET,P,R");	
+	if (krnio_open(2, 8, 2))
+	{
+		// Read the content of the file into the charset buffer,
+		// decompressing on the fly
+		krnio_read_lzo(2, Charset);
+
+		// Close the file
+		krnio_close(2);
+	}
+
+	// Change display address to new screen and 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;
+}
+
+