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Classic Sad Mac: RAM Error?
Posted by: LaPorta on 2023-11-24 12:46:28
I'm just going to score them from another board I have...but where does one get new ones of these from? I'm having a tough time finding replacements.
Posted by: LaPorta on 2023-11-24 14:29:10
Well, replaced those two chips with (assumed good) ones, and I get further errors:

00000005
0007000F

Failed external address line this says? Which and what lines am I looking for now? Looks like a bunch with the second line.
Posted by: ymk on 2023-11-24 16:30:21
00 07 00 0F in binary is:

00000000 00000111 00000000 00001111

A0, A1, A2, A3, A16, A17, A18

You might be able to get more NOS chips on ebay. I expect they're long out of production.

You could try swapping in another pair.
Posted by: LaPorta on 2023-11-24 16:35:46
00 07 00 0F in binary is:

00000000 00000111 00000000 00001111

A0, A1, A2, A3, A16, A17, A18

You might be able to get more NOS chips on ebay. I expect they're long out of production.

You could try swapping in another pair.

Thank you. I truly appreciate the help as I have no formal training in any of this. I actually just ordered this RAM, hoping to harvest the chips from the stick:

www.ebay.com

256KB NEC 30-Pin Sram Simm Parity RAM Memory 256Kx9 100ns 424256-10 | eBay

Please use the technical table below to carefully check whether the memory modules are suitable for the planned application. Please also note the specified module height - this can be important in devices with limited space. Please, check carefully whether the memory modules are suitable for the...
www.ebay.com
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