Unknown 286-12 Motherboard

[Chuck(G)]

ISTR that you can't use the 8-chip SIMMs made for Macs (and other things, such as SCSI controllers)--they don't have the parity bit.

Good luck with the 4MB SIMMs--I don't know if they'll work.

 

[modem7]

Modem 7. Where might I find fuse wire?

Old houses here in Australia (up until the 1950's I guess) used fuses of a particular type in the power/meter box.
One is shown below, which is missing one of the two metal contacts and missing the fuse wire.
A length of fuse wire ran between one contact and the other. Replacement fuse wire is still on sale here in hardware stores.

 

[Chuck(G)]

In the USA, the standard up through the 1950's was the Edison-base glass fuse:

 

[Chromedome45]

Modem7 thanks for the answer. I did not know that anout Australia. :D

Well the 4Meg SIMMS did not work out the board did not even recognise
them. Oh well guess I will have to find some real 1Meg SIPPS.

 

[Chromedome45]

Seeing though I am having problems with my memory beyond 1Meg I found this
board available for sale. Do you think it will work? looks like it has 8 Meg of
RAM on board. Any inputs appreciated. Also I know that if you use an
expansion board it will only run at the AT Bus speed of 8Mhz. Not CPU
speed.

 

[Chuck(G)]

One of those SIMMs (the 9 chip one) should work on your motherboard with no problem. As for the card, it might well map into the space above 1MB--but given that you've got a 286, why not look for an Intel Aboveboard/286? Other than for Xenix, OS/2 and Win 3.0, was there much that couild use extended memory in 286-land?

P.S. If it's 1MB SIMMs you're looking for see ebay 170360396523.

 

[Chromedome45]

It's not the SIMMS I'm looking for. I just want to go above 1Meg.
I can't locate any 1Meg 9 chip SIPPS to mount on the motherboard so
I thought this would be a way of doing it. I have run OS/2 on many
different systems and have never had a 286 board so I wanted to try
any of the 1.x versions. And thay require 2.5Meg as a minimum.

 

[mikey99]

Old houses here in Australia (up until the 1950's I guess) used fuses of a particular type in the power/meter box.
One is shown below, which is missing one of the two metal contacts and missing the fuse wire.
A length of fuse wire ran between one contact and the other. Replacement fuse wire is still on sale here in hardware stores.

Now that makes me feel really old

I still remember when I was a kid and the lights would go out
then going down in the basement with my Dad and holding the
flashlight while he put a new wire in the fuse holder

Oh well , at least we had a flashlight and didn't have to do that by candlelight .......

 

[Mike Chambers]

Well here's my first picture of a completed one as promised.
I tried to locates some 30 pin Single in line sockets but didn't
have any luck. So this was the next best thing.

ahh neat, those ol' SIPP chips are just those 30-pin SIMM modules with pins attached. (obviously) never seen a 286 that takes FPM modules like those you can put in most 386's... neat.

 

[Mike Chambers]

It's not the SIMMS I'm looking for. I just want to go above 1Meg.
I can't locate any 1Meg 9 chip SIPPS to mount on the motherboard so
I thought this would be a way of doing it. I have run OS/2 on many
different systems and have never had a 286 board so I wanted to try
any of the 1.x versions. And thay require 2.5Meg as a minimum.

i always buy my older-type RAM from memoryx.net

here, this will work: http://www.memoryx.net/generic-memory-30-pin-simm.html

just attach your own pins with a soldering iron. all my 30-pin chips came from these guys, they're excellent.