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. Gerrit Message was sent through the cbm-hackers mailing listReceived on 2013-04-15 16:00:04
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