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Author Topic: Don't Cross The Streams (FP scientific calculator serial co-processor)  (Read 7846 times)
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Hi,

This is a vey nice idea  smiley
Is your dual_128 board still available ? in kit form ?
It is a nice startup for me to evaluate a 1*2 Forth Array than can
grow up to a 3*3 one  if I can make it work.

Best regards,

Guy from Paris

Probably need to PM Crossroads w/ this inquiry.

Ray
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What does mean "PM Crossroads" ?
Sorry for my poor understanding smiley,

Thanks,

Guy

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PM = Personal Message  (It is the IM button on the left of each message)

CrossRoads is a member of the forum
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Rob Tillaart

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Shelby Township, Disco, Michigan
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Ray, ever think about interfacing a scientific calculator chip to Arduino? Back in the mid 70's I had a s100 buss 1k Altair computer and I got hold of a board that did that very thing. worked like a charm.
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Ray, ever think about interfacing a scientific calculator chip to Arduino? Back in the mid 70's I had a s100 buss 1k Altair computer and I got hold of a board that did that very thing. worked like a charm.

Yes., thought about it.. Back a few years ago when I was playing with the PICAXE but the UNO came out and had enough SRAM to do IEEE floating point math and being a RISC core, it was faster than the PIC.  Some of the PICAXE dudes went down the coprocessor route but I threw in the towel and went full AVR.
Here:
http://www.micromegacorp.com/umfpu-v3.html

I played w/ an S100 Cromemco while working in Research.  Pretty awesome.  However I went down the less expensive road of 6502 until the 8080.

Ray

PS, this was just a one-off to show it could be done.  If I ever get around to it, I will probably implement a RPN style stack and the HP67 verbs.
« Last Edit: June 14, 2014, 07:59:47 pm by mrburnette » Logged

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I see there is a 64 bit version, uM-FPU64 Same price $19.95. Might be worth playing with.
http://www.micromegacorp.com/wheretobuy.html
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checkout - http://forum.arduino.cc/index.php/topic,101298 -
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Rob Tillaart

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Good info there, but there is more to it besides speed. What about Memory overhead between the two?
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Good info there, but there is more to it besides speed. What about Memory overhead between the two?
very true,
feel free to complement the work of Nick. He will appreciate it (and others with him smiley
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Rob Tillaart

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