--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/upd78k2run.c	Sun Jul 06 15:20:46 2025 -0700
@@ -0,0 +1,70 @@
+#include <stdlib.h>
+#include "upd78k2.h"
+
+int headless = 1;
+void render_errorbox(char * title, char * buf)
+{
+}
+
+void render_infobox(char * title, char * buf)
+{
+}
+
+uint8_t pram[384];
+uint8_t rom[0xFC80];
+
+const memmap_chunk upd_map[] = {
+	{ 0x0000, 0xFC80, 0xFFFFF, .flags = MMAP_READ, .buffer = rom},
+	{ 0xFC80, 0xFD00, 0x7F, .flags = MMAP_READ | MMAP_WRITE | MMAP_CODE, .buffer = pram},
+	{ 0xFD00, 0xFE00, 0xFF, .flags = MMAP_READ | MMAP_WRITE | MMAP_CODE, .buffer = pram + 128},
+	{ 0xFF00, 0xFFFF, 0xFF, .read_8 = upd78237_sfr_read, .write_8 = upd78237_sfr_write}
+};
+
+int main(int argc, char **argv)
+{
+	long filesize;
+	uint8_t *filebuf;
+	upd78k2_options opts;
+	upd78k2_context *upd;
+	char *fname = NULL;
+	uint8_t retranslate = 0;
+	for (int i = 1; i < argc; i++)
+	{
+		if (argv[i][0] == '-') {
+			switch(argv[i][1])
+			{
+			case 'r':
+				retranslate = 1;
+				break;
+			default:
+				fprintf(stderr, "Unrecognized switch -%c\n", argv[i][1]);
+				exit(1);
+			}
+		} else if (!fname) {
+			fname = argv[i];
+		}
+	}
+	if (!fname) {
+		fputs("usage: ztestrun zrom [cartrom]\n", stderr);
+		exit(1);
+	}
+	FILE * f = fopen(fname, "rb");
+	if (!f) {
+		fprintf(stderr, "unable to open file %s\n", fname);
+		exit(1);
+	}
+	fseek(f, 0, SEEK_END);
+	filesize = ftell(f);
+	fseek(f, 0, SEEK_SET);
+	filesize = filesize < sizeof(rom) ? filesize : sizeof(rom);
+	if (fread(rom, 1, filesize, f) != filesize) {
+		fprintf(stderr, "error reading %s\n",fname);
+		exit(1);
+	}
+	fclose(f);
+	init_upd78k2_opts(&opts, upd_map, 4);
+	upd = init_upd78k2_context(&opts);
+	upd->pc = rom[0] | rom[1] << 8;
+	upd78k2_execute(upd, 10000);
+	return 0;
+}
\ No newline at end of file