Mike's PCjr Page

The link you posted above is to an illegitimate, mangled copy of Ted’s original blog entry that describes what he’s done: < https://microcorelabs.wordpress.com/2020/11/12/ibm-pcjr-accelerator-mcl86jr/ > You can backtrack to earlier entries for more of the story. He ended up designing a plug-in boar...

I believe so

https://microcorelabs.wordpress.com/201 ... test-pcjr/

The only quirk I encountered was that some test in the PCjr's POST has a speed dependancy and would always fail if I sped up the processor before it finished. After powerup it would just beep twice with no IBM splash screen and the processor was running the HALT instruction. Maybe thats a hint to wh...

My first machine was a TI 99/4A which I programmed until it ran out of memory! My second was the IBM PCjr which I programmed BASIC and Turbo Pascal in high school, and in college I used it as a 1200 baud dumb terminal to log into the school's VAX machines. Lots of history with the Jr, so it was a pl...

I added 128KB of RAM to the FPGA and removed the cycle compatibility to the original 4.77Mhz processor and got some interestinig results: https://microcorelabs.wordpress.com/ Is this the world's fastest IBM PCjr? :D alanh: You can contact me through my website to discuss potential projects using the...

Hello everyone! Mike Brutman suggested I post a link to my blog entry describing a project where I ported the MCL86, a cycle-accurate - microsequencer-based 8086 core, to an IBM PCjr. Here's the link: https://microcorelabs.wordpress.com/ The IBM PCjr was actually one of my first computers which I wa...