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StilettoAdministrator
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Reged: 03/07/04
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Re: Space Race (non-) progress
01/17/10 05:20 PM


> Thanks for your report! It is appreciated.

You're welcome Juergen!

> > At this point Player 1 score increments, but there's some slight graphics garbage,
> a stray line written to the score.
>
> This happens with all games and I think I know the reason. The way I build up the
> display is some kind of sample-and-hold of the current video signal. You could say
> the pixel value is latched in the bitmap. On a real monitor, however, a very short
> pulse would not be visible, because it won't pass the filters that are in the video
> amplifier etc.
>
> Now it happens that the logic decoding the on-screen 7-segment areas of the score
> seems to generate very short yet invalid signals. It's most probably related to the
> fact that the horizontal and vertical counters are ripple counters which have
> intermediate values while the 4 flipflops in each are changing. So you wouldn't see a
> 10ns pulse on a monitor, but you will see it in the emulation, if it is latched for
> the duration of an entire pixel, i.e. 2 clock pulses.
>
> I'm unsure what to do about it.

Yeah, I kinda noticed it seems spread across all games. What did DICE do about this, did he use some sort of "hack"?

Oh, I forgot to mention that Space Race in your screenshot has double-digit score, but the screenshots I found have single-digit scores? And is that wall generated later in the game, or from the start?

Sorry to keep nitpicking, sometimes I think it may be helpful - great work so far!

- Stiletto







Entire thread
Subject Posted by Posted on
* Space Race (non-) progress pullmoll 01/16/10 05:20 PM
. * Re: Space Race (non-) progress R. Belmont  01/17/10 03:38 AM
. * Re: Space Race (non-) progress Antny  01/17/10 04:00 AM
. * Re: Space Race (non-) progress Naoki  01/17/10 05:06 AM
. * Re: Space Race (non-) progress StilettoAdministrator  01/16/10 09:57 PM
. * Re: Space Race (non-) progress StilettoAdministrator  01/17/10 06:58 PM
. * Re: Space Race (non-) progress StilettoAdministrator  01/18/10 12:56 AM
. * Re: Space Race (non-) progress ranger_lennier  01/18/10 04:26 AM
. * Re: Space Race (non-) progress gregf  01/18/10 04:41 AM
. * Re: Space Race (non-) progress StilettoAdministrator  01/18/10 06:27 AM
. * Re: Space Race (non-) progress pullmoll  01/17/10 11:37 AM
. * Re: Space Race (non-) progress StilettoAdministrator  01/17/10 05:20 PM
. * Re: Space Race (non-) progress pullmoll  01/17/10 09:13 PM
. * Re: Space Race (non-) progress gregf  01/17/10 06:16 AM
. * Re: Space Race (non-) progress ranger_lennier  01/17/10 04:43 AM
. * Re: Space Race (non-) progress StilettoAdministrator  01/17/10 04:51 AM
. * Re: Space Race (non-) progress shadwolf  01/17/10 12:22 AM
. * Re: Space Race (non-) progress StilettoAdministrator  01/17/10 05:29 PM
. * Re: Space Race (non-) progress shadwolf  01/18/10 05:28 AM
. * Re: Space Race (non-) progress pullmoll  01/18/10 02:25 PM
. * Re: Space Race (non-) progress shadwolf  01/19/10 06:44 AM
. * Re: Space Race (non-) progress StilettoAdministrator  01/19/10 03:42 PM
. * Re: Space Race (non-) progress shadwolf  01/20/10 06:22 AM
. * Re: Space Race (non-) progress R. Belmont  01/19/10 04:33 PM
. * Re: Space Race (non-) progress StilettoAdministrator  01/19/10 06:22 PM
. * Re: Space Race (non-) progress R. Belmont  01/20/10 06:35 PM
. * Re: Space Race (non-) progress StilettoAdministrator  01/20/10 10:35 PM
. * Re: Space Race (non-) progress keshbach1  01/19/10 06:27 PM
. * Re: Space Race (non-) progress italieAdministrator  01/19/10 05:00 PM
. * Re: Space Race (non-) progress StilettoAdministrator  01/18/10 06:45 AM
. * Re: Space Race (non-) progress ranger_lennier  01/18/10 11:07 PM
. * Re: Space Race (non-) progress keshbach1  01/19/10 06:37 PM
. * Re: Space Race (non-) progress ranger_lennier  01/20/10 06:20 AM
. * Re: Space Race (non-) progress keshbach1  01/22/10 12:14 AM
. * bump *nt* StilettoAdministrator  01/08/11 08:09 PM
. * Re: bump *nt* StilettoAdministrator  03/28/12 05:58 PM
. * Re: Space Race (non-) progress gregf  01/19/10 12:03 AM
. * Re: Space Race (non-) progress Antny  01/18/10 07:11 PM
. * Re: Space Race (non-) progress gregf  01/19/10 12:10 AM
. * Re: Space Race (non-) progress gregf  01/18/10 11:31 AM
. * Re: Space Race (non-) progress Naoki  01/16/10 05:26 PM
. * Re: Space Race (non-) progress Antny  01/16/10 06:04 PM
. * Re: Space Race (non-) progress pullmoll  01/16/10 06:15 PM
. * hmmm....<Nt> ~dusting off the ramtek trivia schematics~ italieAdministrator  01/16/10 06:46 PM

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