Hi guys,
It seems my 386 has gone off to join the Choir Invisible. I pulled the
motherboard to clean off some battery residue and other gunk, and
replace the RTC chip socket -- now it's completely dead. I'm getting
"D-SUB: NO INPUT" on the monitor, no beeps or noise from the board, no
signs of life whatsoever. The HDD spins up, and the lights blink, but
the brain isn't doing squat.
I did find a broken 14.31818MHz xtal which I've replaced, but still nothing.
I have a sneaking suspicion the through-plating on the RTC socket might
have gone iffy (I'll be breaking the plastic alignment bands on the
socket and soldering the top-side tomorrow) but on the off-chance this
fails to resurrect the board.. Does anyone have a 386 or 486
AT-form-factor PC motherboard kicking around?
The board I had was one of these:
http://stason.org/TULARC/pc/motherboards/I/INFORMTECH-INTERNATIONAL-INC-486…
Basically:
- Baby-AT -- fits in a mini-tower case, AT power supply
- AMD 386DX-40 CPU
- Socket for 387 or Weitek math coprocessor
- 8 sockets for 30pin SIMMs -- max 32MB, but I've been running this
one on 8MB. I've got a box of 72pin SIMMs too.
- I/O on expansion cards, or at least some way of disabling the
on-motherboard IDE controller. This thing needs to drive a Seagate ST21R
RLL controller and a WD WD1003-WA2 (not at the same time, of course!)
- A couple of 16-bit ISA slots (this board has 5, I need at least two)
I'm wishing I hadn't thrown out my old Pentium-P100 board... that would
have been just about perfect for this :(
Thanks,
--
Phil.
classiccmp at philpem.me.uk
http://www.philpem.me.uk/