A calculator with a telephone dial? youtube.com/watch?v=PirCAD…

Just looked up an AMP connector used on a TMS990/189 dev kit 45 years ago and found they are still available new from TE Connectivity using same part number. Amazing.

In this video we look at what I did wrong in a recent repair on an M100 & see if I can’t get it fixed for good. Next we look at a Cryptronics ROM Module. A solution from back in the day allowing for mounting multiple ROMs and a rechargeable power source. youtu.be/pm7JZaZ_crg

In this video we take a look at a TI TMS 990/189 dev board from 1980. In this first episode we’ll get it diagnosed/repaired. In next episode we’ll see what it takes to program the oddball EPROMs used and build some proper cables: youtu.be/D4gIoSXcUQM

Been playing with writing PC-1500 programs that span multiple banks on the CE-1638/163F. Have modified bank sw 'driver' to save/restore 2 more registers so it's possible to have segmented variable RAM (fixed vars A-Z still shared). Now, what is the 'killer app' to for this?

In this video we take a look at a TI TMS 990/189 dev board from 1980. In Part #1 we got the board running and ran a sample program. This time we tackle the cassette and RS232 interfaces, & burn some EPROMs to get University BASIC working. Let’s jump in. youtu.be/ohEvX8rfgos

The CE-1500T 'turbo' for the Sharp PC-1500 lives! I can now programmatically switch between a 1.3mHz and 2.0mHz clock with a simple POKE. Note hi-tech method of keeping ribbon from rubbing PCB :)

It's Ferengi Friday where we take a look at recent acquisitions that have made there way into the shop. I have hunted down the best deals to stretch my gold pressed latinum. Join us & see if we finally found a good deal on self-sealing stem bolts. youtu.be/5hMj5kIzOZY

What is it about submitting a PCB for manufacture causes you to realize a mistake about 10 seconds after clicking the order button?

Saw this video this weekend. Amazing Apollo spacecraft computer's analog multiplexer which used transistors with 4 legs... youtube.com/watch?v=I6lNQU…

Turning a C= 1541 into a KIM-1 youtube.com/watch?v=6loDwv…

In this video we look at a small PCB that turbocharges your PC-1500. With a POKE you can increase clock speed 50%, another POKE and you’re back to normal speed. We cover design, & cover the schematic and code behind it. Join us and find out how it works. youtu.be/l-t8-uN2CoI

Just got my website updated. Whew, that took forever. Did trial runs locally but of course everything works different on someone else's computer (server.)

I could not find my wire wrapping tool/stripper so I borrowed one. About 10 minutes after returning home with borrowed tool I found mine. I swear tools become sentient and just walk away sometimes but only sometimes do they choose to return.

I kept forgetting what mode I left my Backpack drive in so I 3D printed DB25M covers w/text for each mode. The parametric model made it easy to generate DB25F, DE9M&F to0. Not sure if I should all DA-15, DC-37, DD-50 (never seen DD in use).

In this video we take a look at an HP 10529A Logic Comparator. Made in the 1970s by HP for testing 14-16 pin TTL ICs in circuit. We’ll do a bit of repair, find out how it works, do a demo and then look at a few extras that came with. youtu.be/WQsWD32EApw

What's worse than the sticky 'moldy candy bar' in a PC-1500/A? How about when it drys out and becomes the consistency of potting soil? What a mess!

In this video we attempt to repair a failed B drive on an Epson TF-20 dual 5.25” disk drive for HX-20. The diagnoses takes a few wrong turns but we figure it out. Follow along and let us know if we should swap the B drive for a Gotek. youtu.be/VXemPQ22EuU

I just spilled Loctite on my pants leg. I may be stuck in these jeans forever now...

In this Quick Fix video, we tackle a common problem with Sharp PC-1500 / TRS-80 PC-2, the loose battery door. Caused by using too long a screw & dislodging the captured nut. We cover making a new nut & securing it in your device and correct screw to use: youtu.be/6kyhSlS3DPw