Mike's PCjr Page

Did anyone see this? He's claiming that the PCjr can reach AT speeds with his plug in accelerator and a command line program. Seems too good to be true.

https://your.cheer.id/ibm-pcjr-fpga-acc ... r-mcl86jr/

Old news

You can find the original discussion of it right here on this forum: viewtopic.php?f=1&t=603&p=4489

(Ted is an engineer at one of the bigger Tech firms.)

I see that now. Did anything every become of this? The last post is from 2017.

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 board with RAM as discussed in the thread on this forum. He made a few copies, and I have one.

I’ve done some preliminary testing, and it mostly seems to work well. Benchmarks show AT-like speed and applications run noticeably faster. I’ve run into some compatibility issues, however, that aren’t just because of the speed difference. For example, even in cycle-accurate mode, some benchmarks lock up the machine, and the built-in diagnostics are very weirdly screwed up. I think there may be some bugs to work out but haven’t yet had a chance to finish my testing and follow up with Ted.

Ok, thanks for the info. I await the day my PCjr can run some of those later games that support Tandy graphics at a normal speed.

Tempest wrote:Ok, thanks for the info. I await the day my PCjr can run some of those later games that support Tandy graphics at a normal speed.

With a PC Sprint Mod your PCjr. can run games faster than many Tandys.

GHiero wrote:

Tempest wrote:Ok, thanks for the info. I await the day my PCjr can run some of those later games that support Tandy graphics at a normal speed.

With a PC Sprint Mod your PCjr. can run games faster than many Tandys.

Too fast isn't a good thing for compatibility. Got a link to this mod? PC Sprint Mod is a bit too generic for Google to figure out.

Tempest wrote:

GHiero wrote:

Tempest wrote:Ok, thanks for the info. I await the day my PCjr can run some of those later games that support Tandy graphics at a normal speed.

With a PC Sprint Mod your PCjr. can run games faster than many Tandys.

Too fast isn't a good thing for compatibility. Got a link to this mod? PC Sprint Mod is a bit too generic for Google to figure out.

You cast your line too far, your fish are much closer to shore : viewtopic.php?f=1&t=763

GHiero wrote: You cast your line too far, your fish are much closer to shore : viewtopic.php?f=1&t=763

Ah, thank you. Are these boards still being made?

He may make some more in the future. I'll let you know what I hear from him.