On Sat, Sep 26, 2015 at 05:49:55PM +0200, Gerrit Heitsch wrote: >On 09/25/2015 12:26 PM, Marko Mäkelä wrote: >> >>>This NTSC Vic when powered up takes a little longer to display the Rom >>>greeting >> >>This is also normal. I suspect that it is holding the RESET line low >>longer than the C64 does. Because of this super-long delay, my Vic Flash >>Plugin firmware skips the RAM check, to get the start-up time somewhat >>at par with the C64. > >The VIC has nothing to do with the RESET signal. It doesn't even have >a RESET pin. The timing of the RESET signal it controlled by one side >of the 556 timer and a few resistors and capacitors. If it takes too >long for your taste you will have to replace a resistor with a smaller >value. I meant the 556 circuit. I think that the one in the C64 uses a somewhat shorter delay than the one in the Vic-20 (or VC-20). I thought that the "NTSC Vic" was referring to a whole system, not the 6560-101 VIC chip, which IIRC indeed is not even connected to the RESET line. Marko Message was sent through the cbm-hackers mailing listReceived on 2015-09-26 17:00:07
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