Developer [dbalsom] has successfully reconstructed the BIOS for IBM's PCjr from original printed source code, as reported on Hackaday. The PCjr, released in 1984, had a short production run of about one year, but its documentation remains notable.
The project involved transcribing the x86 assembly language listings from the official IBM documentation into a modern ASM file. This allows the BIOS to be assembled and used for emulation or restoration purposes.
According to the project details, the source code was obtained from the IBM PCjr Technical Reference manual, which includes the full BIOS listing. The resulting code can be compiled with contemporary assemblers.
This effort is part of a broader trend in retrocomputing where enthusiasts preserve and recreate historical software from original materials. The PCjr, despite its commercial failure, has a dedicated following among collectors and hobbyists.
