semi-homemade micro

[woodelf]

Allison wrote:

>What do you mean by "Well what about them?"?
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Tell me more about them!  Non 8 bit word length computers.

>Really! theres more stuff about smallC than ever on line.  Maybe back 
>then life was hard but now with the 'net and Google I'm getting to try
>and use those things that back then were either too exotic or hard to 
>find and maybe even too expensive [especially hardware].  Even Minix 
>has evolved (V3.x now).
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All my small C stuff  is stored safe in my bitbucket.   It has too many 
8080 design gotya's
to generate code for the cpu design  I have now.  I don't have register 
to regsister addressing
and indexing from the A register.

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>My last employer went downhill as did my job with it so I have time and 
>very little expendable cash.  However with junk, spares and imagination 
>I achieve a lot with near nothing.  PCs I find costly and less productive.
>Maybe I'm more of the do it and don't tell me how it's hard person.  I'd 
>be dangerous if I had gobs of cash and free time converge.
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Out here all the junk is dead PC's. :(

>Want to try an emulation project?  take a 8048 or 49, strap EA 
>(uses external rom then) and write a program to make port 0 and 
>some latches and stuff on the bus port look like a version of
>your favorite CPU of any word length.  Sure it will be slow 
>(8049 @11mhz run instructions at 1.3us) but different! hang 
>ram rom and IO even front pannel on the emulation and you have
>anything you can imagine and fit in 4k or eprom and 128bytes 
>of internal ram (8049). Those 8048s and 49s are common and 
>easily found in keyboards (LK201 has the faster better 8051!)
>and is a cool old cpu to work with.
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That is a nice idea!


>Allison
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