Gerrit Heitsch wrote: > On 09/22/2012 05:55 PM, silverdr@wfmh.org.pl wrote: >> But there are two pins allocated for +5. Just by adding second pin to >> the plug they could have doubled the current there. > > > You also need 2 pins for GND to make that work properly. Otherwise you > still have a bottleneck. The C64 Powersupply that I upgraded with the Astrodyne SMPS uses the full 7 pins. 3 GND and 2 for +5V. It's also interesting, that at least the first C64 PCB came with only one of the +5V pins wired internally. There is a note in the service manual that a wire is to be installed to connect the second pin. Why this was done is a mystery to me, since all C64 power supplies that I know, use only a single +5V pin. Even the power supplies that have all 7 pins physically installed, have only a single +5V pin connected. I've never seen an original power supply that came with the 1764 REU. Maybe those had both +5V pins connected? Nicolas Message was sent through the cbm-hackers mailing listReceived on 2012-09-22 17:00:38
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