On 08/31/2014 05:51 PM, A. Fachat wrote: > On Sunday 31 August 2014 16:14:34 you wrote: >> Hi, >> >> So if it is not the RAM, what could happen in the driver - probably UE9 or >> UE10 here >> http://www.zimmers.net/anonftp/pub/cbm/schematics/computers/pet/univ/8032081 >> -05.gif that causes this? Probably a slight delay in switching the line on >> or off? > > Nope. Got it. It in fact was the RAM itself. > > Replaced the UE9 and UE10 74LS244 buffers to no avail, still not full memory. > > Then replaced the UA16 RAM - there you go, full memory! Learn something new every day... I didn't think that a 4116 DRAM would be able to 'win' against an LS-TTL driver. Gerrit Message was sent through the cbm-hackers mailing listReceived on 2014-08-31 17:00:03
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