Started by The Equalizor, 01:24, 04 January 22
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Quote from: RetroCPC on 19:59, 09 January 22I often catch myself making the same mistake - the default resistor on my schematic entry is 10K - too easy to forget to change to the actual resistor value...Really the default value should be "X" to prevent such potential mistakes...To be honest. normally 1K would be plenty OK for a pull up resistor... but the "Tri-State / Active pull down" being achieved with the aid of a diode...Would be guessing that the CPC+ is CMOS level sensitive on the ROMDIS line, while the earlier CPC's are TTL logic level based.
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