IBM board.... need help identifying!!

[laxmann31]

I recently pulled out and old computer board out of my closet to use in rebuiling a system. I pulled it out of a late early 90's computer.
It is an IBM board with Intel components...
- Green Math 4C87SL-40
- IBM sticker covering what seems to be the processor (soldered into the board)
- DIN connector
- The only somewhat useful info was found on the backside
JCI-S2S H 94V-0 CSCO D39712A 01 REV C1
- VL41C/V2 Graphics Card
- PTI-265W/260W V0 Card
- Sticker on front read: AENA-3A5-092594-79G3322
- copyright 1993 RYC
-AMIBIOS american megatrends 486slc isa bios (c)1993

I am a noob to this site so please forgive me

 

[wolfie]

if you could take some pictures it might help someone identify it.

 

[laxmann31]

ok here are some pictures.
the two cards that are also shown came with the computer. One of them is a s3 graphics card

 

[laxmann31]

ok they didnt show up, copy the link from the pictures and it will take you to my Flickr acoount. Sorry, i thought they would show up.

 

[wolfie]

 

[Old Thrashbarg]

This looks to be the one. Seems to be a decent little board, might wanna fill up the empty cache sockets, though.

 

[channelmaniac]

The IBM sticker is on a chipset chip.

The CPU is under the heatsink and is a 486SLC, which is a 16 bit external bus like a 386SX CPU designed to be a cheap entry point into the 486 world for consumers.

RJ

 

[laxmann31]

I got to test it first before i do anything with it. I might be aquiring a 1992 GATEWAY 2000 486SX Tower. The guy bought it new way back when and it doesnt boot up. He brought it to a computer shop and they said the motherboard is bad.

I have a P4D-66 Gateway (circa 11-1994) that i gutted and rebuilt. unfortunately the board that was in mine wont fit this one due to different form factors.
I had this board on hand that has the same form factor as the '92 gateway. I just hope it works out

 

[Old Thrashbarg]

The CPU is under the heatsink and is a 486SLC, which is a 16 bit external bus like a 386SX CPU

So wait... how does 32-bit VLB work with a CPU that has a 16-bit bus? Maybe I'm overlooking something obvious, but I'd never thought about it before, since the only SLC chips I've ever seen were on ISA-only boards...

 

[laxmann31]

well i was interested and i researched it. the 486slc was sold under the cyrix name (manufactured by texas instruments) it is apparently based on the i386sx bus

 

[Elar]

I have similar board, an Alaris Leopard 486SLC2 rev C.

http://stason.org/TULARC/pc/motherboards/A/ALARIS-486-LEOPARD-486SLC2-REV-C.html

The CPU on it is IBM 486SLC2-66, not Cyrix or TI.

 

[channelmaniac]

well i was interested and i researched it. the 486slc was sold under the cyrix name (manufactured by texas instruments) it is apparently based on the i386sx bus

It was a Cyrix chip and was fabbed by IBM too... Cyrix didn't have the fab facilities.