ajp166 at bellatlantic.net
Sun Nov 13 16:48:46 CST 2005
>Subject: Re: semi-homemade micro
> From: woodelf <bfranchuk at jetnet.ab.ca>
> Date: Sun, 13 Nov 2005 11:04:38 -0700
> To: General Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org>
>compoobah at valleyimplants.com wrote:
>>All the talk about building a mini from TTL got me thinking about homebuild micros, and what one would look like if I decided to build one (been playing with my IMSAI, too, which probably accounts for some of it)
>The biggest thing I can think of is you only have two sizes of
>computer today ... 16 bits or 32 bits of addressing.
Uhm, what about 12bit[OS8 srt-8]? There are few othter word lenths
than those that are not unobtainium.
>You can only get the 16 machines easly and resonable source of a OS.
Explain that from your perspective.
>The 68000 yes still works best with 64k addressing.
>Oddly the only micocomputer chip I like ( other than the 6800/6809) is
>National Semiconductor's 16032 is another chip that you could never get.
T-11 regular instruction set of the PDP-11. Not too hard to find.
Z8001 and Z8002s I have a few of. Z280, theres an interesting varient
of Z80 with 24bit MMU that looks like the DEC PDP11 MMU (even I&D!).
So you have to be a bit more descriptive.
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