PC-98: Add a test for ESC )3 and ESC )0

pc98-testme-1/contents/BUILD.BAT

@@ -1 +1,2 @@
-tcc -mt -lt -O -Z -3 ansiatrb.c
+tcc -mt -lt -O -Z -3 ansiatrb.c
+tcc -mt -lt -O -Z -k- charmode.c

pc98-testme-1/contents/CHARMODE.C

@@ -0,0 +1,53 @@
+volatile unsigned char far* pc98_dos_charmode(void)
+{
+	return (unsigned char far *)((char __seg *)(0x0060) + 0x8A);
+}
+
+void putc(const char c)
+{
+	__asm {
+		mov dl, c
+		mov ah, 0x02
+		int 0x21
+	}
+}
+
+void puts(const char *str)
+{
+	while(*str)  {
+		putc(*str);
+		str++;
+	}
+}
+
+int main(void)
+{
+	static const char *CHARMODE_NAME[2] = {
+		"\x1B[17mgraph mode\x1B[0m", "\x1B[20mkanji mode\x1B[0m"
+	};
+	static const char *OTHER_ESC[2] = {"\x1B)0", "\x1B)3"};
+
+	int i = 0;
+	unsigned char charmode = *pc98_dos_charmode();
+
+	puts("Switched from ");
+	puts(CHARMODE_NAME[charmode]);
+
+	puts(OTHER_ESC[charmode]);
+
+	puts(" to ");
+	puts(CHARMODE_NAME[*pc98_dos_charmode()]);
+	puts(".\r\n");
+
+	puts("0x80 - 0xA0: ");
+	for(i = 0x80; i <= 0xA0; i++) {
+		putc(i);
+	}
+	puts("\r\n0xE0 - 0xFF: ");
+	for(i = 0xE0; i <= 0xFF; i++) {
+		putc(i);
+	}
+
+	puts("\r\nRe-run to switch back.\r\n");
+	return 0;
+}