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3

One other difference: Xenix 2.3.2 did not have a block buffer cache. Every version of SCO Unixs I've used did. Consequence: On an IBM PS/2 model 80 (?, 20 MHz 386, Micro Channel) the max throughput to the hard drive was 35 KB/s. On an AST Research 486 with a DPT SmartCache SCSI controller (high end for 1992!) we maxed out at 45 KB/s.


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Using SCO UNIX describes the history of XENIX and SCO UNIX and provides a brief summary of the technical differences. As Raffzahn explains, SCO UNIX is the successor to XENIX. XENIX is a licensed version of UNIX; it was called XENIX because initially, AT&T didn’t allow its licensees to use the UNIX trademark. This was relaxed in 1989, which allowed SCO ...


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What exactly were the technical advantages that made their Unix worth more than Xenix? For most parts: The Name. Otherwise it's simply the next release of SCO's unixoide OS. They were only sold in parallel for a short time (ca 1989/90). While the latest Xenix version was based on System V R2.3, SCO Unix started out as System V R3.2. But using the same ...


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The shrinkwrap issue was a vicious circle perceived by the computer industry in the late 1980s to early 1990s. In essence: With many different processors and binary formats, it was difficult for a commercial “killer app” to gain enough market share to bring users to Unix; Without the strong commercial user and software base, there was little incentive to ...


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