Nate Lawson <email@example.com> writes: > Jim's analysis is good. I've found that with one drive that is off but > connected to the IEC bus, it doesn't drag the idle level too low (3.3v > high versus 5v). Unfortunately that depends a lot on the drive. I've seen a high level of just 1.5V on the bus with a C64, a 1541-II (off) and an sd2iec-device (with 4k7 pullups). I assume that the manufacturer(s) of the bus-driving 74xx chips in the disabled drive is just one of the factors that determine how high you can get the voltage in this case. -ik Message was sent through the cbm-hackers mailing listReceived on 2010-11-30 23:00:17
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