Re: Transfer a 8250 diskette

From: William Levak <wlevak_at_SDF.ORG>
Date: Mon, 14 Nov 2011 04:39:19 +0000 (UTC)
Message-ID: <Pine.NEB.4.64.1111140438290.14161@sdf.lonestar.org>
On Sat, 12 Nov 2011, Gerrit Heitsch wrote:

> On 11/12/2011 07:07 AM, William Levak wrote:
>
>> The save with replace bug existed in ALL versions of Commodore DOS up to
>> 1541-II. You can copy the contents of the 1541-II ROM into EPROMs and
>> put them in older 1541s. I have done that on mine, and they work fine.
>> 
>
> How did you do that? Using the standard 2764->2364-Adapter or were you able 
> to find the fabled EPROMs that directly fit into the sockets?


Yes, I have the correct EPROMs.


> More than once I thought about doing the same. But with a single 27C128 in an 
> adapter in one of the sockets, a diode AND gate for the _CS signals and 
> stealing the missing address line A12 from the CPU. So far I have been too 
> lazy to do it though.
>
> Gerrit
>
>
>
>      Message was sent through the cbm-hackers mailing list
>

wlevak@sdf.lonestar.org
SDF Public Access UNIX System - http://sdf.lonestar.org

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Received on 2011-11-14 05:00:03

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