On Fri, Aug 19, 2016 at 10:37 AM, David Wood <jbevren@gmail.com> wrote: > Is anyone familiar with what -5v is used for on PETs? Negative bias voltage for the 4116 DRAMs, a few dozen mA, IIRC. (if you have socketed DRAM and..) if you did the pinballer hack of modding 4164s for use in 4116 sockets (lift out the -5V pin from the socket, and run a jumper over the top of the chip to the high address bit are the steps from memory), you might not require -5V at all. The schematics are out on zimmers.net and shouldn't take long to verify that's the only use. -ethan Message was sent through the cbm-hackers mailing listReceived on 2016-08-19 15:00:03
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