Mike's PCjr Page

Hi. I've recently decided to learn 8088 assembly on my Jr, and so far it seems pretty straightforward given my assembly experience on the TI 99/4A platform. I'm using Compute!'s Beginner's Guide to Machine Language book which is great except that it uses as a base MASM 1.0 (or IBM ASM 1.0). I have M...

Hi. Has anyone here successfully run CP/M 86 on the PCjr? I downloaded a disk image of version 1.1 for the IBM PC, and it booted fine (albeit in 40 col mode), but then an "unexpected interrupt #48" error pops up the minute I press a key on the keyboard... It would really be nice to be able...

I got my first computer in 1981, a TI 99/4A, which was all I could afford at the time. I remember seeing the HeathKit computers in their catalogs, and wished I could get my hands on one, but they were far too expensive even as kits. I was too young in the 70's to have enjoyed the glory of the early ...

You can add to that list The Sentinel and Red Storm Rising. On the other hand, Silent Service I & II, Ultima V, Star Fleet I, Battle Chess, The Eagle's Nest, Conflict in Vietnam, Gunship, War In Middle Earth, Hardball II, Cyrus chess, Anacreon, Conflict in Middle East, All Infocom text adventure...

Looking forward to seeing how this project turns out. If nothing else it's a great exercise in digital logic. I unfortunately don't have that kind of expertise, so I stuck with modifying a 128K sidecar instead by replacing the RAM chips (huge hassle)

It actually turned out that you can activate Tandy sound by setting Port 61 via software. I wrote a small Turbo Pascal utility to do that called Tsound which you can find in the Sound Bits post under Programming.

I've been playing quite a bit with Turbo Pascal 3 programming lately, and it is really a very nice development system given its size. However, I keep bumping into certain "omissions" such as the lack of a Power or Tan function among other things. Since there is an ATN function, I'm not sur...

Hmm.. well, I'd say that the PCjr community was quite resourceful. In fact, it's an interesting reflection on the PCjr demographic - probably smarter than the typical C64 owner [now I'm stirring the pot!], but probably not as much cash, so unable to get a decked out Apple IIe or an IBM PC. "Ne...

[quote="MattCarp"]Walid- is Turbo Prolog public domain? If so, please post a link. Matt, contact me via private email (wmaalouli@comcast.net) and I'll email you the zip file. It's still sitting on my PCjr zip drive but have not had time to play with it although I am definitely intrigued :)...

Actually TP 5 runs fine on the Jr, but some form of hard drive is needed. I have it installed on my parallel zip drive, but for some odd reason I still like the simplicity of TP 3 for small projects. For larger projects though, TP 5 is much better. As for C, while I have done several projects with i...