/* Copyright (C) 1986 by M. J. Shannon, Jr.
** Permission to distribute for non-commercial uses granted as long as this
** notice is retained.  Violators will be prosecuted.
*/

#include	"mpu.h"

/* mpu_id():
**	obtains the version & revision numbers of the MPU firmware and formats
**	it into a string suitable for printing.  The address of the (static)
**	string is returned.
*/

char *
mpu_id()
{
	static char vers_string[9];
	register int v, r;
	register char *p = &vers_string[0];

	v = mpu_get(GET_VERSION);
	r = (v >> 4) & 0x0F;
	if (r > 9)
		*p++ = '1', r -= 10;
	*p++ = r + '0';
	*p++ = '.';
	v &= 0x0F;
	if (v > 9)
		*p++ = '1', v -= 10;
	*p++ = v + '0';
	r = mpu_get(GET_REVISION);
	if (r)
	{
		if (r > 0)
		{
			if (r > 26)
			{
				*p++ = 'r';
				v = r / 100;
				if (v) *p++ = v + '0', r -= v * 100;
				v = r / 10;
				if (v) *p++ = v + '0', r -= v * 10;
				if (r) *p++ = r + '0';
			}
			else
				*p++ = r + '@';
		}
	}
	*p = '\0';
	return (vers_string);
}