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Forums > Requests > Please run these Test-Programs....
2017-09-15 00:46

Registered: Dec 2001
Posts: 8213
Please run these Test-Programs....


in order to get some definitive answers and to confirm VICE is working correctly (or not) it would be great if someone who has a video-capture card could run these test programs and provide screenshots from the real thing:


interesting are results from "new" and "old" VICII (they will produce slightly different result). this is very hard to spot on a CRT (we are talking about a one pixel difference) so if you have a way to capture the real thing please do it :)

another no less interesting case is this test program:


this one is kindof strange, since apparently it will produce different output depending on the temperature of the VICII. if you look at the two reference images... https://sourceforge.net/p/vice-emu/code/HEAD/tree/testprogs/VIC.. and https://sourceforge.net/p/vice-emu/code/HEAD/tree/testprogs/VIC.. eg notice the number of "1" in the fourth character row. this difference is apparently NOT there when the "new" VICII is "cold". it apparently appears on _some_ "new" VICII after a rather long warmup (an hour or more), and it apparently even then also randomly appears and disappears on power cycles. so for this one we need ppl with "new" C64s who can run the program, check the result, powercycle, repeat (a few times) - and do the same after a longer warmup period. the readme in that directory shows the interesting parts of the output.

thanks for your help!
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2017-09-15 12:17

Registered: Dec 2001
Posts: 8213
please, if you want to know what the testprograms do, just look at their sourcecode.
2017-09-15 12:21

Registered: Apr 2002
Posts: 4090
I want to know what interesting properties modesplit has.
2017-09-16 17:31

Registered: Sep 2003
Posts: 1123
Quote: what is this modesplit, any interesting properties ? :) I thought it just changes mode in any cycle ?

The interesting properties are in the machine. The program just try to provoke it in a visible way. ;)

Seriously though, a lot of subtle differences got exposed through modesplit so I recommend it.
2017-09-17 20:50

Registered: Dec 2001
Posts: 8213
i'd like to extend the above request....

1) please also capture https://sourceforge.net/p/vice-emu/code/HEAD/tree/testprogs/crt.. - that will help a lot with actually "reading" the supplied captures and compare them with emulator screenshots

2) as tlr already mentioned, please also capture https://sourceforge.net/p/vice-emu/code/HEAD/tree/testprogs/VIC..


i'll be slowly work through provided results (there is no need to actually make screenshots btw... just capture a video of how you run all those tests after each other, i'll grab the screens myself) and try to create proper pixel perfect reference pictures for our testbench.
2017-09-18 00:07

Registered: Dec 2001
Posts: 208
Quoting Oswald
I want to know what interesting properties modesplit has.

Guess it's just what you think: triggering a change of the hires/multicol-mode within the display area. There seems to be a different behaviour between the VIC chip revisions, the chip conditions (and maybe more) so this is of particular interest.

@Groepaz: feel free to correct and/or add infos.
2017-09-18 16:20

Registered: Dec 2001
Posts: 8213
yes, all those tests do is switching between various modes. the point is that the switches do NOT take effect on character boundaries, but are delayed by one or two (or three) pixels - depending on the VIC revision, and apparently also on temperature. the more you look at it, the less straightforward it gets.

thus: please provide some captures - its the only way to make this accruate.
2017-09-26 01:23

Registered: Dec 2001
Posts: 8213
Anyone? Lemming? ZeroX? Xiny? please... :)
2017-09-26 11:21

Registered: Feb 2004
Posts: 50
Okay I will give it a go now!
Let's hope my capture-card is with me.
2017-09-30 11:07

Registered: Dec 2001
Posts: 880
I don't have a video capture card, but maybe a 4k video of a studio monitor works?


This is my 8580 BN/E machine, has been powered on for about 10 minutes.
2017-09-30 12:30

Registered: Dec 2001
Posts: 8213
will check... generally its a bit hard to overlay/compare screenshots with anything that doesnt come from a capture device though :)
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