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Hi ! I've got a USB Logic Analyzer too. How should I use it to measure the VDP clock? Thanks for your help!

Hi and thanks for your suggestions. I've checked and resolded the DIN connector but without any change. I've measured with my multimeter the frequency on the leads of the video crystal getting about 16 MHz ( should be about 10) and 0 MHz on the 40 and 39 pins of the VDP. When the leads of...

Hi and thanks for having me on this board! Yesterday I took the time to attempt to repair one of my TI99/4a which, judging from the screen displayed and according to this Ninerpeia page (https://www.ninerpedia.org/index.php?title=Troubleshooting) implied a defective 4116 chip and precisely the...