Alberto Gonzalez Aug 18, 2025
When designing my Z80 NOP Tester, I thought, "Why limit it to just the first eight address lines?" So, I added LEDs for all sixteen address outputs.
#Z80 #Z80NOPTester #electronics #maker #MakerMonday
Show threadAlberto Gonzalez Aug 18, 2025
I also added LEDs for the clock and other control signals, such as M1, RFSH, MREQ, and RD, which I think are really useful.
#Z80 #Z80NOPTester #electronics #maker #MakerMonday
Show threadAlberto Gonzalez Aug 18, 2025
You'll also find a potentiometer at the bottom right corner that allows you to adjust the clock frequency from around 4 Hz to 90 Hz.
#Z80 #Z80NOPTester #electronics #maker #MakerMonday
Show threadAlberto Gonzalez 
Oh, in case you missed it, here's a previous tweet with a video of the Z80 NOP Tester in action:
#Z80 #Z80NOPTester #electronics
https://mastodon.social/@agonzalez/115004641037713187
Aug 18, 2025 at 12:35pmIceCubesApp