# include "bi.h"

/*
 * Block I/O routines for the Micro Decision installer
 */


biosread ()
	{
	static char *p;
	static s;



	p = biosbuf;

	for (s = BIOSSTART; s < BIOSEND; s++, p += RECSIZE)
		{



		if (sio (READ, p, BIOSTRACK, s))
			{
			fatal ("Can't read bios\n");
			}


		}

	}

bioswrite ()
	{
	static char *p;
	static s;

	p = biosbuf;

	for (s = BIOSSTART; s < BIOSEND; s++, p += RECSIZE)
		if (sio (WRITE, p, BIOSTRACK, s, s == BIOSEND - 1))
			fatal ("Can't write bios\n");
	}

sio (op, addr, track, sector, last)
	{
	static char selected [5] = {NO};

	bios (SETDRV, drive, selected[drive]);

	selected[drive] = YES;

	bios (SETTRK, track,  0);
	bios (SETSEC, sector, 0);
	bios (SETDMA, addr,   0);

	if (op == READ)
		return bios (BIORED, 0, 0);
	else
		return bios (BIOWRT, last, 0);
	}