From: email@example.com To: Paul Ruizendaal <firstname.lastname@example.org> Cc: TUHS main list <email@example.com> Subject: Re: [TUHS] PC Unix Date: Wed, 07 Apr 2021 08:57:28 -0700 Message-ID: <firstname.lastname@example.org> (raw) In-Reply-To: <E1002140-0E02-4C72-B515-25A240F50E47@planet.nl> Yes, that sounds about right. LSX and MX used older versions of UNIX and binary licensing from WE was not yet available. Heinz On 2021-04-07 00:52, Paul Ruizendaal via TUHS wrote: >> I developed LSX at Bell Labs in Murray Hill NJ in the 1974-1975 >> timeframe. >> An existing C compiler made it possible without too much effort. The >> UNIX >> source was available to Universities by then. I also developed >> Mini-UNIX >> for the PDP11/10 (also no memory protection) in the 1976 timeframe. >> This source code was also made available to Universities, but the >> source >> code for LSX was not. >> >> Peter Weiner, the founder of INTERACTIVE Systems Corp.(ISC) in June >> 1977, >> the first commercial company to license UNIX source from Western >> Electric for $20,000. Binary licenses were available at the same time. >> I joined ISC in May of 1978 when ISC was the first company to offer >> UNIX support services to third parties. There was never any talk about >> licensing UNIX source code from Western Electric (WE) from the >> founding >> of ISC to when the Intel 8086 micro became available in 1981. >> DEC never really targeted the PC market with the LSI-11 micro, >> and WE never made it easy to license binary copies of the UNIX >> source code, So LSX never really caught on in the commercial market. >> ISC was in the business of porting the UNIX source code to other >> computers, micro to mainframe, as new computer architectures >> were developed. >> >> Heinz > > The Wikipedia page for ISC has the following paragraphs: > > "Although observers in the early 1980s expected that IBM would choose > Microsoft Xenix or a version from AT&T Corporation as the Unix for its > microcomputer, PC/IX was the first Unix implementation for the IBM PC > XT available directly from IBM. According to Bob Blake, the PC/IX > product manager for IBM, their "primary objective was to make a > credible Unix system - [...] not try to 'IBM-ize' the product. PC-IX > is System III Unix." PC/IX was not, however, the first Unix port to > the XT: Venix/86 preceded PC/IX by about a year, although it was based > on the older Version 7 Unix. > > The main addition to PC/IX was the INed screen editor from ISC. INed > offered multiple windows and context-sensitive help, paragraph > justification and margin changes, although it was not a fully fledged > word processor. PC/IX omitted the System III FORTRAN compiler and the > tar file archiver, and did not add BSD tools like vi or the C shell. > One reason for not porting these was that in PC/IX, individual > applications were limited to a single segment of 64 kB of RAM. > > To achieve good filesystem performance, PC/IX addressed the XT hard > drive directly, rather than doing this through the BIOS, which gave it > a significant speed advantage compared to MS-DOS. Because of the lack > of true memory protection in the 8088 chips, IBM only sold single-user > licenses for PC/IX. > > The PC/IX distribution came on 19 floppy disks and was accompanied by > a 1,800-page manual. Installed, PC/IX took approximately 4.5 MB of > disk space. An editorial by Bill Machrone in PC Magazine at the time > of PC/IX's launch flagged the $900 price as a show stopper given its > lack of compatibility with MS-DOS applications. PC/IX was not a > commercial success although BYTE in August 1984 described it as "a > complete, usable single-user implementation that does what can be done > with the 8088", noting that PC/IX on the PC outperformed Venix on the > PDP-11/23.” > > It seems like Venix/86 came out in Spring 1983 and PC/IX in Spring > 1984. I guess by then RAM had become cheap enough that running in 64KB > of core was no longer a requirement and LSX and MX did not make sense > anymore. Does that sound right?
next prev parent reply other threads:[~2021-04-07 16:35 UTC|newest] Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-04-07 7:52 Paul Ruizendaal via TUHS 2021-04-07 15:57 ` heinz [this message] 2021-04-08 22:31 ` Warner Losh 2021-04-07 8:20 Paul Ruizendaal 2021-04-07 18:04 ` John Gilmore 2021-04-07 22:18 ` Thomas Paulsen 2021-04-07 22:40 ` Larry McVoy 2021-04-07 23:04 ` Jon Steinhart
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