// bcc -ansi -Md -O iodump2.c -o iodump2.com

#include <stdio.h>

unsigned char	in_b(unsigned short port)
{
#asm
	push	bp
	mov	bp, sp

	mov	dx, [bp + 4]

	in	al, dx

	pop	bp
#endasm
}

int	main(int argc, char *argv[])
{
	FILE	*fp;
	unsigned short	f, r;
	static unsigned char	buf[256];

	fp = fopen("iodump2.bin", "wb");
	if (fp == NULL) goto fin0;

	for (f = 0; f < 256; f++) {
		for (r = 0; r < 256; r++) {
			buf[r] = in_b((f << 8) | (r << 0));
		}

		fwrite(buf, sizeof(buf), 1, fp);
	}

	fclose(fp);
fin0:
	return 0;
}