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Quoth · 02-16-2023, 08:38 AM

The original PC was a sort of skunks-work out of a catalogue, hence the crippled 8088 (Neither 8088 or 8086 was a real 16 bit CPU, no flat address space). IBM was surprised when it was a success. There were plenty of better OS (PC-DOS/MSDOS was obsolete already being a port of CP/M) and real 16 bit cpus (both 3rd party and IBM in house 16 bit). The success of PC and MS-DOS held back consumer/business computing for nearly 10 years.

By 1980 (PC announced in USA) UNIX was 14 years old and the first sort of free UNIX (BSD) was 2 years old. There were loads of other decent OS by 1980, but as the 8088/8086 wasn't a real 16 bit CPU and was really just an 8085 with more 64K address chunks and some more 16 bit instructions it could only run the 8086 versions of CP/M 80, actual CP/M 86 and the clone PC-DOS/MS-DOS.

The MCA was 6 years after IBM-PC was sold in UK & Ireland. The EISA came out a year later and was much more successful, though rare other than on servers. Many of the PCs using MCA by IBM were underspec'ed. They doomed it.
Then PCI was 1993. However the VESA MoBo expansion of ISA was a disaster though still in use unfortunately in 1990s.

02-16-2023, 08:38 AM	#4
Quoth the rook, bossing Never. Posts: 11,216 Karma: 85874891 Join Date: Jun 2017 Location: Ireland Device: All 4 Kinds: epub eink, Kindle, android eink, NxtPaper11	The original PC was a sort of skunks-work out of a catalogue, hence the crippled 8088 (Neither 8088 or 8086 was a real 16 bit CPU, no flat address space). IBM was surprised when it was a success. There were plenty of better OS (PC-DOS/MSDOS was obsolete already being a port of CP/M) and real 16 bit cpus (both 3rd party and IBM in house 16 bit). The success of PC and MS-DOS held back consumer/business computing for nearly 10 years. By 1980 (PC announced in USA) UNIX was 14 years old and the first sort of free UNIX (BSD) was 2 years old. There were loads of other decent OS by 1980, but as the 8088/8086 wasn't a real 16 bit CPU and was really just an 8085 with more 64K address chunks and some more 16 bit instructions it could only run the 8086 versions of CP/M 80, actual CP/M 86 and the clone PC-DOS/MS-DOS. The MCA was 6 years after IBM-PC was sold in UK & Ireland. The EISA came out a year later and was much more successful, though rare other than on servers. Many of the PCs using MCA by IBM were underspec'ed. They doomed it. Then PCI was 1993. However the VESA MoBo expansion of ISA was a disaster though still in use unfortunately in 1990s. Last edited by Quoth; 02-16-2023 at 08:45 AM.