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Questions tagged [ibm-pcjr]

The IBM PCjr is a PC-compatible home computer. For questions about other PC-compatibles please use the [ibm-pc] tag.

4
votes
1answer
157 views

How is the 320x200x16 graphics mode mapped in the IBM PCjr?

I've read that the PCjr supports a 320x200 pixel mode with 16 colors. But what I can't seem to find is how much memory that takes, how it's organized (chars?) or where it's located in memory. I'm ...
9
votes
1answer
117 views

How to do the Tandy 1000 audio mod on a PCjr?

The information on modifications on the PC Enterprises website was never saved by the web archive, so looking there is out. I remember in their printed catalogs they sold a mod kit for making the PCjr ...
11
votes
1answer
627 views

Can the IBM PCjr be upgraded to support the better features of the Tandy 1000?

It is well known that the IBM PCjr was a commercial failure and that the Tandy 1000 series of computers not only matched the features of the PCjr (other than maybe the wireless keyboard), it also ...