- Mike's IBM PCjr Page: Comprehensive information about PCjr.
- PCjr Web Forums: Talk to other PCjr enthusiasts.
- PCjr Cartridge ROMs: ROM dumps of PCjr cartridge software
- PC DOS 2.1: The version of DOS that came with the PCjr originally.
- PC DOS 3.3: Also supported on PCjr. No real advantage as far as I can tell, and takes more memory.
- IBM Macro Assembler 2.0: Assembler that works on PCjr with 128KB.
- IBM PC BASIC Compiler 2.0. Runs on PCjr; executables are faster than interpreted BASIC.
- Borland Turbo Pascal 3.0: Works on PCjr with 128KB and uses only ~30KB on disk.
- Disk BASIC: Compaq MS-DOS 2.12 OEM disk contains BASICA.EXE which will run on the PCjr without Cartridge BASIC installed. This provides disk support for BASIC but does not support any PCjr specific features.
- NASM: Excellent x86 assembler for many platforms. Produces 16-bit binaries that will run on PCjr.
- Turbo C++: Runs in DOSBox or on a more powerful DOS PC, produces binaries that will run on PCjr.
- RAWRITE.EXE: Useful for writing disk images to physical media.
- DOSBox-X. Great for extracting files from disk images. Use
imgmount a disk.imgto mount disk images,mount c c:\dosto mount a target directory, and then copy the desired files from the disk.
- PCjr Keyboard Emulator for Arduino: Allows you to paste things from a modern PC to the PCjr via a serial terminal over the infrared keyboard receiver.
- jr-IDE: PCjr IDE interface and memory expansion.
- PCjrCart: PCBs for creating your own PCjr cartridges.
- PcjrNet: Unfinished project to create an ethernet adapter that plugs into the modem slot.
Here are a few more titles from archive.org
Hands-on BASIC for the IBM PCjr
Beginner's Guide to Machine Language on the IBM Pc & PCjr