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Topic: Don't Cross The Streams (FP scientific calculator serial co-processor) (Read 11880 times) previous topic - next topic

mrburnette


Hi,

This is a vey nice idea  :)
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

GuyFortabat

What does mean "PM Crossroads" ?
Sorry for my poor understanding :),

Thanks,

Guy


robtillaart

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

CrossRoads is a member of the forum
Rob Tillaart

Nederlandse sectie - http://arduino.cc/forum/index.php/board,77.0.html -
(Please do not PM for private consultancy)

steinie44

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.

mrburnette

#19
Jun 15, 2014, 02:57 am Last Edit: Jun 15, 2014, 02:59 am by mrburnette Reason: 1

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.

steinie44

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

robtillaart


checkout - http://forum.arduino.cc/index.php/topic,101298 -
Rob Tillaart

Nederlandse sectie - http://arduino.cc/forum/index.php/board,77.0.html -
(Please do not PM for private consultancy)

steinie44

Good info there, but there is more to it besides speed. What about Memory overhead between the two?

robtillaart


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 :)
Rob Tillaart

Nederlandse sectie - http://arduino.cc/forum/index.php/board,77.0.html -
(Please do not PM for private consultancy)

PowerSoft

Hello,

Read this topic with great interest.
Try to compile the arduino file, but without results  :~

In this line :   if (verbose) { Serial << sStack[j] << " Found" << " at location " << j << "\n" ; }

I get the error: no match for 'operator<<' in 'Serial << sStack[j]'

How can I solve this?

Thanks for any help.

Jan Kromhout
Hellevoetsluis-NL


robtillaart

you probably need to install the Stream library

which version of the IDE are you using ?

(Brabant, ook NL)
Rob Tillaart

Nederlandse sectie - http://arduino.cc/forum/index.php/board,77.0.html -
(Please do not PM for private consultancy)

mrburnette


...I get the error: no match for 'operator<<' in 'Serial << sStack[j]'

How can I solve this?

Thanks for any help.
Jan Kromhout
Hellevoetsluis-NL


Jan,

Here is the reference page: http://playground.arduino.cc/Main/StreamingOutput
And the library is implemented as:
Code: [Select]

#include <Streaming.h>


Many thanks to Mikal Hart, http://arduiniana.org/libraries/streaming/

Ray

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