Re: 8032 to 4032 conversion

From: Gerrit Heitsch <>
Date: Mon, 15 Apr 2013 17:04:54 +0200
Message-ID: <>
On 04/15/2013 12:43 AM, Christian Dirks wrote:
> Hi all,
> the problem I described is solved.
> After spending hours on searching for the cause of it, I called Helmut
> Proxa on the phone.
> Like always, he led me to the answer within a short time.
> The problem was caused by using a EPROM (TMS2532JL-45) as chargen, which
> worked without problems in 80 col. mode.
> With a ROM the 40 col. mode works fine.

Could be that the EPROM is just a tad too slow for the timing used in 
40col mode which seems to differ from 80col mode as you found out.

I had a similiar problem once, in order to use a 2532 as a char-ROM in a 
C64, I had to get 2532-30 (300ns). Anything slower would result in a 
snow storm.


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Received on 2013-04-15 16:00:04

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