dkling@ptdcell0.intel.com (Dean Kling) (05/24/91)
In article <283AB586.2143@orion.oac.uci.edu> wiedeman@altair.acs.uci.edu (Lyle Wiedeman) writes: >I have a Kaypro II'83 which after 8 years of loyal service, lost >the ability to boot. (Drive A can't read the boot track of ANY >disk, old, new, or master.) I tried the drive-head cleaning trick >with no apparent effect. [...] >Question 2: Barring that, does anyone know how the drives are keyed >to their identities? >-- > Lyle Wiedeman Distributed Computing Support > wiedeman@uci.edu Office of Academic Computing > wiedeman@UCI.BITNET Univ. Calif. Irvine My old computers are packed away at the moment, but as I reacall there is a jumper or dip swith block for drive select (usually silkscreened on the printed circuit as DS0.DS1.DS2.DS3 (or sometimes starting with 1 vice 0). The other item is terminating resistors, which are usually a DIP or SIP pack near the drive select jumpers. The terminating resistors need to be on the drive at the END of the cable. This was before IBM created the abomination of inserting a twist in the drive cable to avoid having to set the jumpers. Dean dkling@ptd.intel.com -- ============================================================================== Dean F. Kling dkling@ptd.intel.com (503) 642-6829 I don't speak for Intel
JOHN.ANDEERSON@farwest.FidoNet.Org (JOHN ANDEERSON) (05/29/91)
Dean, As previously mentioned the DS jumpers are the key. I would recommend rotating the drives, A to B B to A. REmove the terminating resistor form drive B, the last drive in the chain. place the Terminating resistor in Drive A. THe T-RES will look like an intgrated circuite but will have a 10 ohm symbol on it. Set drive A for DS0 on the jumpers, set drive B to DS1 on the jumpers. If you jumpers begin at 1 - 4 instead of 0 - 3, use 1 and 2 respectively. If you have any questins please feel feel free to call MIDECON ZNODDE #16 (518) 489-1307 STARLINK 9192. GOOD LUCK, John-A ZNode #16 * Origin: The Black Box RCP/M MSBBS, 713-480-2686 HST/V32/V42bis (106/601)