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Old 17th Sep 2018, 11:25 pm   #1
Karen O
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Default Retro computer homebrew: Orton SC/MP computer

This has been under development for some time so, hopefully, all of the bugs have been eradicated!
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File Type: pdf Orton SCMP computer manual.pdf (708.0 KB, 298 views)
File Type: zip Orton SCMP computer files.zip (22.1 KB, 76 views)
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Old 18th Sep 2018, 1:27 pm   #2
dave_n_t
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Default Re: Retro computer homebrew: Orton SC/MP computer

What a phenomenal effort, Karen!



I admire your ingenuity, patience, and ambition.


I used to write Z80 assembly code and so have a bit of an idea of what's involved, but I'm certain I'd never manage anything like this collection.


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Old 18th Sep 2018, 8:09 pm   #3
Karen O
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Default Re: Retro computer homebrew: Orton SC/MP computer

You are very kind Dave, thank you!
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Old 19th Sep 2018, 8:04 am   #4
dalekmoore2007
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Default Re: Retro computer homebrew: Orton SC/MP computer

Your pretty much a genius Karen amazing work what ever you put your mind to !
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Old 19th Sep 2018, 8:56 am   #5
Karen O
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Default Re: Retro computer homebrew: Orton SC/MP computer

Nah! If I were a genius I think my bank balance would look rather better

I just get fixated and devote too much time to old ideas.

Who else would still be thinking about an 8 bit micro that was significantly under-powered compared to its contemporaries forty years later?
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Old 19th Sep 2018, 10:04 am   #6
Nymrod121
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Default Re: Retro computer homebrew: Orton SC/MP computer

Quote:
Originally Posted by Karen O View Post
Who else would still be thinking about an 8 bit micro that was significantly under-powered compared to its contemporaries forty years later?
Similar-mindset people who think that a 1911 Underwood typewriter is a thing of beauty (guilty as charged, m'Lud) - "The Repair Shop", episode 11, series 3
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Old 20th Sep 2018, 12:44 pm   #7
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Default Re: Retro computer homebrew: Orton SC/MP computer

Hi Karen
Well done on what must have been a mammoth task.
Getting a PIC to produce video for your terminal was a big ask on it's own.
I bet your fingers are sore from counting instruction cycles.

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Old 20th Sep 2018, 1:42 pm   #8
Karen O
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Default Re: Retro computer homebrew: Orton SC/MP computer

Thank you Frank,

As a project it has been going on for about ten years, so I've probably got the bugs sorted out!

I like PICs because they're very deterministic. I have done some things with PICs that one oughtn't be able to do (like video generation).

I confess I used the Microchip 'SIM' debugging tool, which includes a stopwatch to time sections of code. Even so, there are places where every single cycle is used!
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