Sinclair ZX80 / ZX81 / Z88 Forums

Welcome to the community and to the amazing (also sometimes frustrating, but VERY interesting, addictive and full of original surprises) Zeddy world!! I think I got what you need here: http://sinclairzxworld.com/viewtopic.php?f=8&t=2386 PM me if interested... EDIT: DON'T throw away your old keyboar...

mrtinb wrote: ↑Sun May 28, 2017 5:28 pm I've not needed an oscilloscope much. But I use this app for my iPhone that read the signal through the microphone input jack.

http://oa.onyx3.com

I actually looked for an app that can replace the oscilloscope but I couldn't find one. Thanks for the sharing.

22.JPG 33.JPG If you know what I mean... :cry: It was in perfect condition with intact original 80's keyboard cable before I pulled its ULA out but now it's in MODDED condition.:( The working one sacrificed its intact keyboard cable to diagnose the not working one... 11.JPG This ULA is the root of ...

Mark Wow Mark you just wrote a small book for beginners.:D That really helped me to understand about the socketed chips and the oscilloscope a lot. Thanks so much.:) Yes I finally pulled out the ULA and sadly it's the ULA's problem. The not working one works fine with the ULA from the working one. ...

Hi ts1000user, Do you have an oscilloscope? If so, you can check an ULA's back porch "wave" with a probe into a video output jack or on a "middle" wire before a video modulator or on a D9's anode. 10us 2v AC TVH Hopefully, this will help you out, Dessony Thanks for the useful advice dessony.:) I'm ...

Assuming that they are both USA models (as that was the market for TS1000 machines), they both should have the same type of modulator. The switch that MaFli mentioned is simply the channel change switch (the USA modulars can transmit on one of two frequencies/channels). Are the ULA chips on both bo...

Hi ts1000user, Welcome to the forum! And nothing wrong with your English. I'm sure someone can help you out. Many clever folks here :-) But I had a quick look at the modulator on your TS1000. It is marked UM1082LA2/3. I recently bought a ZX80 with a similar modulator and that one was intended for t...

Hi forum users. I've bought a TS1000 from the Ebay a month ago and I immediately found out that the TS1000 is not properly working. First the keyboard cable was all broken so I've ordered a new keyboard for zx81 from sellmyretro and I got the package this night. (Took less than 2 weeks. Amazing.) Th...