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Vintage Computers Any vintage computer systems, calculators, video games etc., but with an emphasis on 1980s and earlier equipment.

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Old 21st Mar 2022, 8:34 pm   #1
Phil__G
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Default Ronald Decker's SC/MP with NIBL & FP BASIC

For the archive, Ronalds diagram with corrections:
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Old 24th Mar 2022, 1:22 am   #2
SiriusHardware
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Default Re: Ronald Decker's SC/MP with NIBL & FP BASIC

Lots of interest / downloads but no comments! For the uninitiated (me), what was the origin of this project? I'm afraid I have never heard of it.
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Old 24th Mar 2022, 1:59 pm   #3
Phil__G
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Default Re: Ronald Decker's SC/MP with NIBL & FP BASIC

Sorry G I should have posted a link, here you go:
https://www.dos4ever.com/SCMP/SCMP.html

Its the only reference I've seen to a floating point basic for the SC/MP, I'd love to try it one day.

If you back up a level from the sc/mp page, Ronalds site is full of random electronics projects

Cheers
Phil
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Old 24th Mar 2022, 9:23 pm   #4
audiokit
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Default Re: Ronald Decker's SC/MP with NIBL & FP BASIC

Hello Phil and Sirius,

In February 2021 I finished building this computer in wire wrap and posted some pics in this forum. I will repost some in this thread. It really works well, I had both Nibl and the floating point running on 1 computer (seperately of course).
Regards, Benny
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Old 25th Mar 2022, 12:54 am   #5
SiriusHardware
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Default Re: Ronald Decker's SC/MP with NIBL & FP BASIC

Nice to see that it uses the more mainstream 8255 for general I/O instead of the almost inevitable INS8154.
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Old 10th Apr 2022, 2:42 pm   #6
Phil__G
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Default Re: Ronald Decker's SC/MP with NIBL & FP BASIC

Hi Benny, I'd be interested to hear your opinion of the SC/MP floating-point basic, how it performs, ease of use, how it compares with NIBL (bearing in mind that NIBL was adapted specifically for the SC/MP, and theres a hint that maybe the FP could be using IL code from the PET?)
Many thanks
Phil
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Old 11th Apr 2022, 8:17 pm   #7
audiokit
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Default Re: Ronald Decker's SC/MP with NIBL & FP BASIC

Hello Phil,

It is a matter of fact I build this computer more then a year ago and only tested it for a short period of time and then started building Karen Orton's SCMP with NIBL and page2 support. For me this still is the most interesting extension of what was ever made to programm the SC/MP, specially the build in assembler is a joy to work with when you know how to handle it.
After that it was the Elektuur SC/MP which has cost me a lot of time to build all the boards.

You can see a lot of the functions in Ronald's website under the "summary of floating point statements and commands".
It really looks like a mature Basic language with a lot of arithmetic functions and jumps. And of course it is floating point so you can just use PI.
The seamless integration of machine code in basic that you have in NIBL is the only thing I missed. So you have to PEEK and POKE to use the machine code.

The page where you can find the full statements and commands: https://www.dos4ever.com/SCMP/FBASIC.html
Just let me know if you want me to test something specific.
Benny
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