Re: MFM drive gone nuts

From: Gerrit Heitsch <>
Date: Tue, 22 Jul 2014 17:12:36 +0200
Message-ID: <>
On 07/22/2014 11:02 AM, Michał Pleban wrote:
> On a side note: I replaced the failed TMS4256 chip with a stock 41256
> chip I had in my supplies, but it did not work. I thought all the x256
> DRAM chips should be interchangeable? Is there anything special about
> the TMS4256?

No, it's a normal 256Kx1 DRAM with an 8Bit Refresh. You sure that the 
one you used as a replacement works? Sometimes ICs die in storage, now 
an then I have one that worked last time I tested it and now doesn't.


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Received on 2014-07-22 16:00:02

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