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HP75C / FORTH / Clock?
03-18-2017, 08:43 AM
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RE: HP75C / FORTH / Clock?
(03-17-2017 02:00 PM)charger73 Wrote:  With the new HP75 emulator EMU75 is makes fun to play with the existing software, for example FORTH.
While learning FORTH with the HP75 – I have transferred the N-Queens benchmark source code to the HP75
...
But now my question. How I can measure the runtime of the routine NQUEENS. I see no time command in the FORTH environment. Is there a clock memory address?

That's a tough question!

The HP75 timer is made of 5 consecutive bytes at the same physical address in the I/O space. I see no way to read it from Basic (PEEK) or Forth, only a multibyte read opcode can do it from assembly.

I had a lot of interest in Forth at the time (but never used the HP75 version).
Now, Forth is definitely too cryptic and unstructured for me ...

J-F
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Messages In This Thread
HP75C / FORTH / Clock? - charger73 - 03-17-2017, 02:00 PM
RE: HP75C / FORTH / Clock? - J-F Garnier - 03-18-2017 08:43 AM
RE: HP75C / FORTH / Clock? - Garth Wilson - 03-18-2017, 09:57 AM
RE: HP75C / FORTH / Clock? - J-F Garnier - 03-19-2017, 10:00 AM
RE: HP75C / FORTH / Clock? - John Cadick - 03-18-2017, 05:19 PM
RE: HP75C / FORTH / Clock? - John Cadick - 03-18-2017, 06:36 PM
RE: HP75C / FORTH / Clock? - charger73 - 03-19-2017, 07:17 AM
RE: HP75C / FORTH / Clock? - xerxes - 03-19-2017, 05:12 PM
RE: HP75C / FORTH / Clock? - hth - 03-19-2017, 09:09 PM



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