Activity Stream

Wasn't someone asking somewhere recently about 101 BASIC Computer Games? Since I had become aware of it and now it became feasible for me to do it...

Great Find! Good thing you found them when you did.

I like to replicate vintage pcb's as closely as possible, it seems to increase the probability of it working out. I have been looking into the...

Great! Thanks! I also found my cache of master disks and have imaged those... Having multiple copies allows me to sort out what the 'most original'...

I guess now is as good as time as any to tell you something. There are some parts that are on their way to you. I had some parts that were a...

I used segments of the 4041 example program in my Tektronix MI 5010 Instrument Interfacing Guide and discovered by trial and error how to add those...

Well, I guess just one is a dual diode BY511150. The others are power amps, rectifiers and voltage regulators, some of which include an internal...

Permit me to say that I don't see the payback. A CR2032 should last close to a decade in normal operation. Will a ML2032 last substantially longer?

If you want a laugh here's my lo-tech approach. The big black chip in the lower left is an AVR324 that's programmed to do address generation and...

Getting there ... Dave

Sorry for the delay in following up on these posts. Been a heck of the end of a year. Where might I find these ML2032 batteries? Locally all I can...

If you have multiple rails on the secondary side shorted to ground, you'll need to start pulling parts off the power rail until the short goes away....

From watching videos on repairs, the discoloration of the board has been identified to me. It is leaking electrolytic fluid. So I need to at the...

Okay I have been off and on looking for the stupid battery that goes for my meter. I have not been successful. So the question at this point...

The linked RC2014 card above uses a Raspberry Pi Zero, and essentially all it does is DMA. (It uses some external hardware glue to regularly pause...

Wow, that's quite the board there. It's all open, so ordering through tindie isn't required, boards can be fabbed other places, but it's pretty...

The whole microcontroller argument doesn't bother me. Not sure how one "black chip with silver legs" is any different from any other "black chip with...

This RC2014 card lists TRS-80 compatible graphics as a feature and shows the system running Galaxy Invasion: ...

Thanks for that link to the book ! The schematic matches another photo of the card (attached that has two LS240 and a LS640). So from this I can...

You know, this might not be a bad idea at all. I honestly hadn't thought of doing it that way. Thanks for the insight, and the inspiration! ...

I hope to talk more with the original owner in coming days. I suggested that he joined this wonderful group and post as he is retired and still has...

... The IEEE topic opens up a whole can of worms, actually. If this actually comes together I'm going to want some kind of storage device, but I'm...

I'm *pretty sure* cursor blink is done by counting the vertical refresh IRQs. There's a mention of it in here, and I think I may have seen the code...

Just googled up RC2014, and looking at the structure of the bus... When you say "z380 with simple hardware compatibility", do you mean a single card...

Anent the barrel battery: If you're going to replace it with some external primary cells (e.g. AA batteries) connected to a header intended for that...