Sinclair ZX80 / ZX81 / Z88 Forums

Pin 13 of Z14 is directly connected to the data line D5 and you can see all data flowing there. Take pin 13 of Z14 out of the socket and then see what you have there during the LOAD execution. If you would like to separate LOAD signal only, the oscilloscope should be triggered by the 0xFE read puls...

Do you load TZX files or WAV? Are you sure that your TZX player can generate waveform with correct Jupiter ACE timings and it could be understood by Jupiter ACE? Jupiter ACE timings are different to ZX Spectrum ones. 1kHz sounds right for "0" pulses. Pilot's frequency is approx 800Hz, a logical "1"...

McKlaud wrote: ↑Sat Sep 26, 2020 5:52 pm Hi and congratulation with your build. Regarding the loading issue, try to replace C3 (47nF) to 470nF or more and check.

I'm betting more than that. No effect. The signal is available at input 14 Z18

Colleagues, I have a question about Jupiter. Built a new Jupiter Ace. Loading from a tape recorder doesn't work. I type Load, and the computer goes into standby mode. I turn on the Wave file from the PC player. After loading, Jupiter is still waiting. I checked the signal with an oscilloscope. On pi...