C64 reset timing

From: silverdr_at_wfmh.org.pl
Date: Mon, 25 Jan 2021 20:46:42 +0100
Message-Id: <D8691365-DDD9-498F-9C7E-07D81160D175_at_wfmh.org.pl>
When testing BeamRacer prototypes on as many different C64 / SX64 boards as possible I remember encountering a problem with one machine, which we had to take into account and work around. The root issue with that particular board was that upon power-up the _RST (reset) line was not asserted for some prolonged time but became inactive (almost?) immediately once VCC stabilised. This didn't seem to affect the way the machine worked and I probably wouldn't notice it at all if it wasn't causing issues with our add-on. While now I am yet to find that particular machine back and analyse it thoroughly, I am wondering that's something, which could be described as a common failure or feature? Has any of you in the know encountered anything similar?

-- 
SD! 
Received on 2021-01-25 21:00:04

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