On 2025-11-24 2:32 a.m., Johan Helsingius via cctalk wrote:
On 24/11/2025 9:57 am, Tony Duell via cctalk wrote:
When I started out in computing, the typical home
micros (PET, TRS-80,
Apple ][, and later BBC micro, Spectrum, and also the original IBM PC,
XT, AT) machines were simple enough that even I could understand them.
Simple enough that a student in Helsinki could write a complete UNIX-
compatible operating system for it. :)
Not quite true, Minix almost never made it out the door because IBM had
undocumented logic with memory parity or something like that. The IBM
emulation ran fine, not the PC.
Julf
And is UNIX Comparable a good thing?
What about all the lost USA and UK and USSR computers and operating systems.
I have lots of operating system books. but they speed the first 325
pages on multi-tasking and the last 20 pages on a file system.
Ben.