256kx4 dram 60NS for a500 rev6a chip ram

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oggie

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I want to upgrade my rev 6a a500 to 1mb chip and need 4 of the 256kx4 dram chips.

Let me know what you have.
 
What the hell do you want with 60 ns chips for ChipMEM in an A500??? :D

100 ns should be more than fast enough... ;)
 
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The ones that are there now are 60ns. It makes sense to match them.

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If they're the same specs, I don't see why not. Do you know of ones that have the chips in them?

Would the chips used in old VGA cards work?
 
If there are 4 empty posiitons for memory on the motherboard, I think you'll find you need 4 of 1Mbit x 4.
4 x 1Mbit = 4Mbit = 512Kbyte, 16-bit wide.
 
The ones that are there now are siemens hyb514256b-60, which are 256kx4. so you need 2 to make 256, 4 to make 512.

4 more of the same make 1mb.

There are 8 slots in total, with 4 in use.

If there are 4 empty posiitons for memory on the motherboard, I think you'll find you need 4 of 1Mbit x 4.
4 x 1Mbit = 4Mbit = 512Kbyte, 16-bit wide.
 
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OK - mebbe I had a brain-fart there. I'll shut up - don't want to mis-inform anyone.
 
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