Just replaced my A2090A with an A2091 with total success, and am now using
a new Fujitsu 530MB HD as a second hard drive.
Not the A2091 I received had no documentation (bought used), so I need a
bit of information on the board.
Near where the memory chips go is a jumper labeled AUTO/DIS. What is this
for?
Okay, the memory sizing jumper is a no brainer.
What about the OPTIONS jumper, JP5, with jumpers labeled 1, 2, 4?
What type/speed of memory chips does the board take? I want to populate
it to 512k, which should just fill up my autoconfig space (4 megs on
A2620, 3 megs on an 8up!, and 512k space taken up by the 2386
bridgeboard).
73, Kelly
Kelly,
The Auto/Dis jumper enables or disables autobooting from the hard drive.
The options jumpers control several things. #1 is for "LUNs", or multiple
drives at a given SCSI address. Putting the jumper On enables LUNs. #2 on
extends the timeout period waiting on the drives to spin up . The other
jumpers are reserved.
The memory chips are CMOS 256kx4, 120ms or faster.
-Jim
MOS via Autopilot & Amiga