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Comment by jandrese | Hacker News Reader

I don't think MMUs were common on machines that ran on a Z80 however.

The 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

It's on display at the Paul G. Allen Living Computer Museum.

https://sites.google.com/site/mthompsonorg/Home/pdp-10/pdp-1...

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

>Photo 6/7: KL-UDGE lights panel

>Photo 7/7: KL-UDGE boards. Real-time time of day clock?

Was on display. The LCM closed due to COVID and there's no indication that it's coming back, sadly.

The 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.

I 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.

The sixth unit had CP/M disabled, so accountants wrote it down as 0.7 units.

Wow, I had no idea there was basically a second computer hiding inside of the C128. No wonder it cost so much.

Did you mean 5.7M?

For 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)

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