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a mathematical demo

Started by litwr, 19:31, 24 December 15

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Audronic

Quote from: TFM on 15:23, 06 September 16

That must have been a cool world too, I just got in contact with it relatively late. There were some real great Tandy / TRS computers (I still have a color genie with tape deck and memory expansion, free to a good home in 8 months). The company Trommelschläger made compatible computers called them Genie I, II or II. The mode IIS actually had an ECB bus. I saw it once, pretty neat.  :)
Hi TFM
I was involved with the testing of 2 External hard drive systems a year ago a Low cost Ide that we finally got going using "DOMS" and the other a "FreHD" an SD card Based Hard drive, These were for the Model 1/3/4/4p.
I also Have an equivalent to the Genie called a "System-80 and Expander" that with some help was able to get the "FreHD" to work with.


Thanks again for the Memory (sic)
Ray
Procrastinators Unite,
If it Ain't Broke PLEASE Don't Fix it.
I keep telling you I am Not Pedantic.
As I Live " Down Under " I Take my Gravity Tablets and Wear my Magnetic Boots to Keep me from Falling off.

litwr

#76
Habi had generously helped with PCW10 hardware for 1000 digits.   :) It is surprising for me that the character output routine in PCW CP/M is much faster than at CPC CP/M.
Quote from: Prodatron on 20:56, 06 September 16
EdoZ and me developed a benchmark tool for SymbOS to compare the supported platforms more or less in a 1:1 way.
Here are some screenshots with the results:
SymbOS MSX multitasking operating system - help needed! | MSX Resource Center
The Enterprise is again different, as it runs at real 4MHz, if the code doesn't run inside the video ram page (a little bit like "fast" and "chip" ram on the Amiga).
IMHO it is very difficult to understand the results.  What are the units of measurement?  Is it just a rank setting?  Why are there 1,9 (not just 1)?  ZX Spektrum is also using fast and slow RAM, isn't it?  I also miss the results for PCW.
Quote from: robcfg on 21:15, 06 September 16
If I remember right @TFM , @Habi and myself, we have PcW16.
So, if we find a way to run your test code on them, we'll do it gladly.
You may use the version for any CP/M for a stopwatch in the penultimate attachment.  I have just built a special version which should work with any CP/M 3.  It uses BDOS call to get timer but this call provides only results with 1 second accuracy.  So please use a stopwatch for 100 and 1000 results.
It is also worth to try PCW version from the previous attachment.  However I am not sure that it will work with PCW16.  Thanks in advance.  It maybe very precious result.
BTW It is interesting why did Alan Sugar ignore R800?  IMHO R800 at 16 MHz might compete with 80486 at 20 MHz...

litwr

The version 17 of pipack was released several days ago.  It contains the improved version for Amstrad CPC which became 15% faster for 100 digits.  I would like to make a version for the great SymbOS but it is the plans only.  I still hope to get results for the mentioned earlier rare Amstrad PCW16 or even more rare  Genie IIIS...  ;)

litwr

#78
Pipack-18 is released.  It contains now the code for the best 8-bit CPU, 6809.  I can't call it perfect but it is the best de facto.  It is sad that I couldn't find forums dedicated to 6809 like for z80 or 6502.  Any help?  Please.  Dragon-32 showed (with screen off) the performance only a bit less than the fastest mass produced 8-bit home computers.  I hope that help of 6809 experts makes pi-demo for 6809 a bit faster.

litwr

#79
Pi-pack-22 is ready.  Amstrad CPC/PCW programs became a bit faster.  ;D I am still curious to get results for PCW16.  ;)
http://litwr2.atspace.eu/pi/pi-spigot-benchmark.html

litwr

My obsession continues, pipack-23 is ready.  It has a minor fix to Amstad CPC Basic and a new program for ZX Spectrum 48k.  I expected that Speccy would be 10% faster than Amstrad but it shows only 2% speed gain.  Maybe emulators are not quite accurate. :( BTW I didn't meet ZX until 2017.  It was a bit shocking that its firmware forbids to use IY register.  :o

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