Improve 68K instruction decoding. Add simple disassembler.

1 files changed, 33 insertions, 0 deletions

diff --git a/dis.c b/dis.c
new file mode 100644
index 0000000..d269059
--- /dev/null
+++ b/dis.c
@@ -0,0 +1,33 @@
+#include "68kinst.h"
+#include <stdio.h>
+#include <stdlib.h>
+
+int main(int argc, char ** argv)
+{
+	long filesize;
+	unsigned short *filebuf;
+	char disbuf[1024];
+	m68kinst instbuf;
+	unsigned short * cur;
+	FILE * f = fopen(argv[1], "rb");
+	fseek(f, 0, SEEK_END);
+	filesize = ftell(f);
+	fseek(f, 0, SEEK_SET);
+	filebuf = malloc(filesize);
+	fread(filebuf, 2, filesize/2, f);
+	fclose(f);
+	for(cur = filebuf; cur - filebuf < (filesize/2); ++cur)
+	{
+		//printf("%x:", *cur);
+		*cur = (*cur >> 8) | (*cur << 8);
+		//printf("%x\n", *cur);
+	}
+	for(cur = filebuf; (cur - filebuf) < (filesize/2); ++cur)
+	{
+		printf("cur: %p: %x\n", cur, *cur);
+		cur = m68K_decode(cur, &instbuf);
+		m68k_disasm(&instbuf, disbuf);
+		puts(disbuf);
+	}
+	return 0;
+}