Mike's PCjr Page

Hooray, congrats on landing the job! Here's my stupid question: will the code run on a 16F88 or will it only run on the 12F617 (yeah, I know the pinouts are different). The software I finally located for my PIC programmer will program a 16F88, but not a 12F617. I'd like to try the latest code withou...

For anybody else interested in ASM programming, "Assembly Language for x86 Processors" by Kip Irvine is a great textbook. Earlier versions used to include a copy of Microsoft MASM 6.11 which could be patched up to 6.14 to get rid of some nasty bugs. While that doesn't run on a PCjr, I thi...

Good luck with the job! The first job out of school is kind of exciting. A thought for the future if you do another run of boards - a couple mounting holes in the board would be handy. Looks like there is space. I plan to put mine in a small plastic box and think I've found a couple likely spots to ...

jmetal88 wrote:OH! I see. It's when Num Lock is on

Ah, exactly! I did have the Num Lock on. I was about to drag out another jr to see if it was only this machine, but you fixed it before I could do that. You da man!

Found some oddball behavior today. :shock: After trying out a Compaq, a couple different IBM, and a MaxiSwitch PS/2 keyboard, I saw that they all exhibit the same thing: the shifted 1-0 on the top row of keys (below the function keys) do not emit the symbols on the keys or much of anything. The othe...

Mine arrived today in the mail. IT WORKS GREAT!!!! Only had it plugged in for a few minutes, but discovered the most pleasant thing: I no longer have to twist my fingers and hold my mouth to the left to get a backslant! Typing a long path to a file on the jrIDE is no longer an exercise in screaming ...

I'm kind of amazed that you were able to source the connector and shroud! Somebody probably has a $175 crimping tool that will make it look very pretty, but is it really necessary? Probably not. Heck, you could probably make a few bucks selling replacement PC Jr keyboard cables or just the connector...

Bad news is that even with the external oscillator, the PCjr is still not receiving the occasional keystroke correctly. Are these chips re-programmable? If so, it won't be a problem to implement code fixes. Even if you have to replace a $2-3 chip for an upgrade - not a big deal. MikeModified has se...

MikeModified wrote:I'd buy at least one @ $25.00.

I agree with Mike - I'd buy one too. Eventually, it would be fun to make my own.

This is like the AT/PS2 to XT adapters I bought from hargle - there is no end to their usefulness.

<*> Jim

jmetal88 wrote:Alright, it's a terrible video, but here it is.

Doesn't look terrible. Nothing like seeing it actually work! That's very cool!