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I don't think MMUs were common on machines that ran on a Z80 however.
by jandrese 4y ago
I don't think MMUs were common on machines that ran on a Z80 however.
- NegativeLatency 4y agoFor example a Programmable MMU was an optional add on for the Macintosh II (which wasn’t a z80 but serves to illustrate the time when they began to become available to home computers)
- DonHopkins 4y agoThe home-brew pager (MMU) of the MIT-MC PDP-10 KL10 was appropriately called "KL-UDGE". (KL was the prefix of the PDP-10 model). https://en.wikipedia.org/wiki/Kludge https://en.wikipedia.org/wiki/Kludge It's on display at the Paul G. Allen Living Computer Museum. https://sites.google.com/site/mthompsonorg/Home/pdp-10/pdp-10-serial-numbers https://sites.google.com/site/mthompsonorg/Home/pdp-10/pdp-1... https://donhopkins.com/home/catalog/images/mc-console.jpg https://donhopkins.com/home/catalog/images/mc-console.jpg Lars Brinkhoff has taken photos of the KL-UDGE blinken lights panel and naked wire wrap boards: https://twitter.com/larsbrinkhoff/status/1128601896619524097 https://twitter.com/larsbrinkhoff/status/1128601896619524097 >Photo 6/7: KL-UDGE lights panel >Photo 7/7: KL-UDGE boards. Real-time time of day clock?
- wk_end 4y agoWas on display. The LCM closed due to COVID and there's no indication that it's coming back, sadly.
- 300bps 4y agoThe Commodore 128 had an 8502 CPU, a Z-80 CPU and an 8722 MMU. Was a pretty popular machine - sold 5.7 units worldwide. But probably only a tiny fraction actually used the CP/M mode that used the Z80.
- jandrese 4y agoWow, I had no idea there was basically a second computer hiding inside of the C128. No wonder it cost so much.
- anticensor 4y agoDid you mean 5.7M?
- philistine 4y agoI don't know what's more concerning. The fact they only sold 5.7 units, or the fact someone managed to only buy .7 of a Commodore 128.
- otto2 4y agoThe sixth unit had CP/M disabled, so accountants wrote it down as 0.7 units.