Quote:
Originally Posted by BetterRed
Calibre has been known to run on BSD, I'll leave to others as to whether it is real Unix.
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There was a BSD that was the original fork of UNIX because AT&T AKA Bell Labs insisted they owned all the work done in Universities. This was long before Linux. Xenix on 286 was a Microsoft effort and used AT&T licensed UNIX source. They sold that to the original SCO (no real connection to later patent Troll SCO). I've installed and used MS Xenix, Cromemco Cromix (68K/Z80 dual CPU), Minix (which is certainly noy UNIX, but UNIX like with a micro kernel). Used AT&T UNIX once when learning C++ in 1987 (it used a pre-processor that produced C source).
So not sure if BSD is real UNIX as it supposed to have no AT&T source (is it origin of GNU programs =
Gnu is
Not
Unix?). MS Xenix on 286 was AT&T licensed, but due to 286 hardly a "proper" Unix. You really needed 386 for a proper "Unix", the 286 was a stupid CPU compared to ARM, 68000, Z8000, and the National Semi CPU. The original 8086/8088 was the world's worst 16 bit CPU as it was hardly more than an 8080/8085, no flat address mode; only 64K blocks. The 8088 was chosen by IBM for PC to beable to use 8080 perpherals, drivers and apps. Intel had a machine code translation tool, So making CPM/86 from CPM/80 was trivial and MSDOS/PCDOS was based on a somewhat reversed engineered CPM/86 that MS bought in. Hence Wordstar, Dbase, Supercalc on DOS at once and DOS had no subdirectories till a later version.