The Home Computer Revolution - The History of the Home Microprocessor - Part 2

[TechKnowledgeVideo]

Part 3 releases 26th Oct, 9PM BST, 1PM Pacific, 3PM Central, 4PM Eastern

[jasondrummond]

Truly excellent - can't believe it doesn't have more likes.

[scottfranco]

An aside about the 8008 to 8080 transition: The 8008 was an 18 pin package which was very small for an 8 bit processor. As a result, it was highly multiplexed. It would issue a "status" cycle on the data bus that gave things like I/O vs memory status for the coming instruction cycle. When the 8080 design came along, the package went up to 40 pins (a standard that lasted for many years). However, the 8080 maintained its odd status multiplexing. This and the fact that it used a two phase clock set the 8080 up to be lapped by other chips, including the Z80, which fixed those issues. The 8080 was not really a single chip processor, since (like the 8008) it had a companion chip that demultiplexed its I/O and provided a two phase clock.

[fooboomoo]

Why is this channel so small. Underrrated

[johnirvin]

so well done, I love this. more more more!!!

[lifesoordinary]

Thank you for creating this series, really enjoying your channel. Please do some more in depth videos on particular architectures.

[awuma]

Don't forget the Compaq Deskpro 386, which by using the ISA bus torpedoed IBM PS/2 circa 1986. The Intel 386 had some very important features, such as protected memory for multiprocessing and multiuser applications, 32-bit memory and data buses, and the ability to run 8086 applications (e.g. MS-DOS) in a protected memory space at the same time as the 32-bit OS was running. This was a huge advance over the 286, which actually was a bit of a dog, needing a crazy kludge to access more than 1 MB of memory and to run multiple processes. And then there was the real wonder, which got canned after a year: the Sun Microsystem 386i. Progress in the use of PC's would have advanced by many years had Sun and not Microsoft won the computer war. Sun chickened out, seeking higher profit margins in a small market (technical workstations) instead of winning the whole PC software market.

[ken]

I like the video. Good history and content. I think the pacing of the voiceover and editing could be much faster.

[somethingelse]

Vic20, C64, C16*, C128*, Amiga 500, Amiga 1200*, Amiga 1200, PS1, PCs * = Returned