Re: 1541C reset behaviour

From: Gerrit Heitsch <gerrit_at_laosinh.s.bawue.de>
Date: Mon, 15 Jan 2018 18:23:44 +0100
Message-ID: <1b19d64b-df7e-c378-bd7b-d8db0bf1d4e3@laosinh.s.bawue.de>
On 01/15/2018 06:19 PM, Terry Raymond wrote:
> Can you put the 1571 better ROM mentioned into a 1541 to improve it?

No, the 1571 has some significant hardware differences.

You can use the 251968-03 from the 1541-II in a normal 1541 though, just 
need to split it into 2 images and use adapters on the ROM sockets.

  Gerrit



> 
> Terry Raymond
> 
> On Jan 15, 2018 9:25 AM, "Gerrit Heitsch" <gerrit@laosinh.s.bawue.de 
> <mailto:gerrit@laosinh.s.bawue.de>> wrote:
> 
>     On 01/15/2018 05:21 PM, Mia Magnusson wrote:
> 
>         Den Mon, 15 Jan 2018 13:11:23 +0100 skrev silverdr@wfmh.org.pl
>         <mailto:silverdr@wfmh.org.pl>:
> 
> 
>                 On 2018-01-14, at 20:22, Hegedűs István
>                 <hegedusis@t-online.hu <mailto:hegedusis@t-online.hu>>
>                 wrote:
> 
>                 one more thing. I have tried to open J3 in one of my
>                 drives but it
>                 did not help. Maybe the sensor doesn't work in it.
> 
> 
>             Read the doc I sent in response to Francisco's post:
> 
>             http://d81.de/R.I.P/1541C-to-1541II-diff-03.txt
>             <http://d81.de/R.I.P/1541C-to-1541II-diff-03.txt>
> 
>            While we are at it: Can anyone confirm that the only
>         difference between
>         the three 1541 versions is firmware and this sensor (except
>         differences
>         that aren't visible to software)?
> 
>         I might do the 1541 to 2031LP mod but I only have a 1541-II and a
>         classic 1541 but with the "1541 C" mechanism, so I'm not sure if
>         any of
>         those are suitable for conversion.
> 
> 
>     They should be... I have a Oceanic OC-168 drive that uses the
>     electronics of the old 'long board' 1541, meaning all TTL, no gate
>     array. The ROM in it is the one from the 1541-II, meaning a
>     251968-03. No, not a copy, I put a real ROM in there.
> 
>     So far it works fine.
> 
>       Gerrit
> 
> 
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> 


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Received on 2018-01-15 18:02:52

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