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Anyone know what the RJ11 port on the side of this Belkin F1D066 KVM is for? Its not mentioned at all in the manual. I would assume remote triggering but how would I use it? Thanks

I have 3 T4400 power supplies that I'm troubleshooting after replacing all the caps. I get enough life from them to get blink codes ( variously related to memory initialization) I'm hoping someone could enlighten me as to the pinouts. I know the obvious voltage related ones but I'm clueless...

I'm looking for the dip switch settings on a Kurta IS/one 12 inch digitizer. The same one in this video. All help is appreciated. Thanks

What issues am I going to run into trying to overclock this board? It is currently a 386dx 20 . I have new a 40 mhz processor and coprocessor for it. Anything else I should be looking to replace? Cache? Ram? controllers? It has the turbo switch to half the speed.

I'm curious how they get 4 sockets out of this adapter with only a single Cirrus pd6720 controller? Anyone have an explanation? https://www.ebay.com/itm/332627579655

It seems like it was a pretty common chipset and Im hoping I can get my hand on some drivers for an ISA to PCMCIA adapter.

Full height MFM drive wanted, any make, preferable less than or equal to 20mb

What programs were there to add usability functions to windows 3.1? I hearf of one that adds a start menu, was there ever anything that added a right click menu?

Im trying to find a part number for the memory card that goes to and Everex step 386 https://stason.org/TULARC/pc/motherboards/E/EVEREX-SYSTEMS-INC-386-STEP-386-REV-G.html They have a picture of it there but no usable part number. Any Help is appreciated.

I have a strange add on board on the lower motherboard of the machine. It says SICET107 on it and plugs into a 40 pin dip. On other mother boards it appears there is a just a chip in this location, back right corner under the video card. Any help is appreciated.

Was there ever an external numpad add on for the trs-80??

I cant find anything on how to poll the serial port. I saw a reference to needing machine code but not list of the commands. Any help would be appreciated.