Mike's PCjr Page

Booting to a DOS diskette (To be safe,always use the same DOS version as what was on the C: drive) and typing "fdisk /mbr" should be the 1st step in attempting to resurrect a non booting C: drive. It is quick, harmless and might get you out of a jam of having to re-install everything from ...

I'd say use Normal wherever you can. This is a single ROM image inside a single EEPROM, so there's no need to do any of the even/odd/first byte of n options, those would be used when there is a large amount of data spread across multiple chips. Unused bytes in an EEPROM should be FF which is the era...

a little necroposting around halloween is always appropriate... Just yesterday I got around to dumping my cartridge of kindercomp. I'm toying with adding it to my cartridge games on floppy disk, but haven't gotten to rebuilding the environment for working on that quite yet. I did however manage to c...

Sticking with DOS 2.10, although period accurate, is going to give you more headaches than it's worth, especially if you plan on using any kind of modern PC to transfer files. DOS 2.10 uses FAT12 which is why the max partition size for a hard disk is 32MB. With DOS 3.31 or higher, you can get FAT16 ...

another PCjr spotting:
the newest netflix series "money explained" has someone in the art department using a cartoonish PCjr to represent computer activity.
It appears in a couple episodes.

I'm actually afraid to dig into this archive to see what's there. I won't come back out for weeks once I start!
Thank you friend.

Just typing out-loud here, but the keyboard fix this program performs could be added into the jrIDE BIOS as a permanent update. " This program makes the PCJr keyboard interrupt routine (INT 09h) compatible with the PC keyboard interrupt routine. The difference between the two is that the PC rou...

interesting! I claim "not it" on this. While I have provided the source for the original 0.11 release of the XTIDE BIOS to at least one other person, even I have no idea of what you changed to make it work on the jr.

Mike, would you have time to throw the code on github? It's time to open source it. The XT-IDE 0.11 source isn't current against whatever you've done for the PCjr, so I can't really help here.

It needs some deep cleaning first. I'll make the time to do that.

Looks like the perfect opportunity for total DOS launcher:
https://github.com/MobyGamer/total-dos-launcher

works with DOS 2.1 and has all the features you need for a menu system, including a favorites list.