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sailor
Registered: Jan 2002
Posts: 90 |
Release id #194046 : 1541 Speed Test
Regarding the alignment, would you elaborate your thoughts on the following: (from the docs)
Quote:F3 align the head to track 42 in a better way than other programs do.
F5 moves the head to track 1
How to correctly align a drive:
1) gently unscrew the screws of the track 1 "stop"
2) press F3
3) press F5
4) gently move the track 1 block so there is 0.25 mm (a hair or little more) between the block and the head the head.
5) screw the screws tight carefully checking the block is still at 0.25mm from the head.
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Zibri
Account closed
Registered: May 2020
Posts: 304 |
Quote: Quote:Thanks to Groepaz who recently modified VICE (r38422) giving a bigger (way too big) speed range to the 1541 emulation
To be exact, that range was tested and verified with a real drive, its only slightly more than the extremes that could be observed (~266 to ~336). The previous range was totally arbitrary, invented by compyx for the UI.
That's ok... I found a drive that could go down to 261 until now but never as up as 328... but I think is a good margin and it's finally symmetric.
It also gave me the chance to add 2 lines of code and correct the formula to support the lower speeds which I wanted to do from some time.
Thanks again, really. |
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Zibri
Account closed
Registered: May 2020
Posts: 304 |
Groepaz
without I open a ticket, check the VICE code about the "Wobbling".
As it is is totally unreal.
Even at the maximum setting it does not resemble any 1541 I have seen so far.
Test my program with a real drive and with VICE and you will see clearly the difference.
Also check the video of the tutorial of my program where a guy (his 10 year old son!) sets the speed of a 1541 using my program. In that video you can clearly see the wobbling of a real 1541.
As of now I use the wobbling set to 0 when testing calculations and to maximum.. but the algo must sure be rewritten.
A hint: you could add to the "speed variable" a sinusoid multiplied by some random number in the "range" of the wobbling variable.
That should give you more real looking results.
It's very easy to spot an emulator otherwise. |
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Krill
Registered: Apr 2002
Posts: 2940 |
Quoting ZibriIt's very easy to spot an emulator otherwise. The entire VICE staff themselves are the first to "admit" that some things remain to be emulated correctly, and as such may serve as low-hanging fruit for emulator detection. (There's also a public test result matrix where no emulator passes each and every test, iirc.)
That said, if this is such an important thing for you, why not submit a patch yourself? :) |
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Zibri
Account closed
Registered: May 2020
Posts: 304 |
Is not so important.
But I saw that gpz is modifying some code in 1541 emulation and I thought this might be of help.
Sincerely I never check all sources and I didn't setup a build environment for that behemot to be compiled.
I was just reporting. |
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Zibri
Account closed
Registered: May 2020
Posts: 304 |
Quoting KrillThere's also a public test result matrix where no emulator passes each and every test, iirc.
Where? I am curious to see that. |
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Adam
Registered: Jul 2009
Posts: 323 |
Quote: Oh.. so you show yourself!
Go back to your lair.
There's no food for you here.
Lamer? 8 million people think otherwise.
WTF you think you are? Just a loser downvoter.
I don't care about ranking at all.
It makes me just laugh there is people so "little" around.
this was the exact reaction i was hoping (and expecting) to receive. you didn't fail to disappoint me or others, zibri. :D
> I don't care about ranking at all!
> *50yo man proceeds to cry like a child to everyone that his lame tool got downvoted*
> 8 million people think otherwise!!!1111
:D absolutely beautiful. cry harder, lamer. |
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Zibri
Account closed
Registered: May 2020
Posts: 304 |
Quoting Adamthis was the exact reaction i was hoping (and expecting) to receive. you didn't fail to disappoint me or others, zibri. :D
> I don't care about ranking at all!
> *50yo man proceeds to cry like a child to everyone that his lame tool got downvoted*
> 8 million people think otherwise!!!1111
:D absolutely beautiful. cry harder, lamer.
Bye loser. |
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Krill
Registered: Apr 2002
Posts: 2940 |
Quoting ZibriQuoting KrillThere's also a public test result matrix where no emulator passes each and every test, iirc.
Where? I am curious to see that. https://vice-emu.pokefinder.org/index.php/Testbench#Results |
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ChristopherJam
Registered: Aug 2004
Posts: 1403 |
Quoting Zibri Groepaz
without I open a ticket, check the VICE code about the "Wobbling".
As it is is totally unreal.
It would certainly be useful to collect some statistics on how real drives with inconsistent speeds actually behave in practise - even just a typical oscillation period would be nice to know. You mentioned a sinusoid, but are we talking rising and falling every few seconds, or multiple times per revolution, or? |
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chatGPZ
Registered: Dec 2001
Posts: 11293 |
Indeed, another testprog that shows a scatter plot / deviation over time in some way is needed for this. |
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