TronDD wrote:Double check you have exactly the right chips in the right places.
Looking back over the CPU board I found that ICQ should have been a 74123 but I have a 74LS123. Maybe that's the problem?
TronDD wrote:Double check you have exactly the right chips in the right places.
AltairClone wrote:Switch to 1v per division and put 0v of each trace at the same horizontal position on the display so that the waveforms overlap each other. Also set the time scale to 50ns and let’s take another look. The biggest issue is generally the phi2 high period which affects the critical phi2 falling edge to phi1 rising edge spec.
Mike
AltairClone wrote:Are you using an LS or regular 123 and what are the values of R41 and R42?
Users browsing this forum: No registered users and 1 guest