MAMEWorld >> EmuChat
View all threads Index   Flat Mode Flat  

reenigne
MAME Fan
Reged: 04/08/15
Posts: 5
Send PM
Re: 8088 mph we break all your emulators
04/09/15 11:59 AM Attachment: cga_1k_colours.png 6 KB (0 downloads)


> By all means, fill me in on said tricks.

The technical write-up is now online at http://www.reenigne.org/blog/1k-colours-on-cga-how-its-done/ .

> I'm also curious to know if there are any
> specific limitations as to what colors can be next to each other,

The are no such limits. Any of the colours can be placed in any of the pixels in the 80x100 grid.

> and if there are
> any limits on the range of colors you have available.

The exact set of colours is fixed by the hardware. The palette looks something like this:

> If I had to wager a guess, it
> partly involves abusing luminance transitions, and partly involves the I and Q
> components having differing amounts of bandwidth available to them, and therefore,
> different effective horizontal resolutions for their particular portion of the
> signal.

It's a good guess but I and Q have the same amount of bandwidth in a composite signal - it's only broadcast (RF modulated) NTSC where Q has lower bandwidth.

[ATTACHED IMAGE]

Attachment







Entire thread
Subject Posted by Posted on
* 8088 mph we break all your emulators RdW 04/08/15 04:56 AM
. * Re: 8088 mph we break all your emulators Moose  04/08/15 08:26 PM
. * Re: 8088 mph we break all your emulators jonwil  04/08/15 05:44 AM
. * Re: 8088 mph we break all your emulators MooglyGuy  04/08/15 08:02 AM
. * Re: 8088 mph we break all your emulators reenigne  04/08/15 11:05 AM
. * Re: 8088 mph we break all your emulators MooglyGuy  04/09/15 11:32 AM
. * Re: 8088 mph we break all your emulators reenigne  04/09/15 11:59 AM
. * Re: 8088 mph we break all your emulators R. Belmont  04/08/15 05:07 PM
. * Re: 8088 mph we break all your emulators reenigne  04/08/15 07:04 PM
. * Re: 8088 mph we break all your emulators MooglyGuy  04/09/15 02:38 AM
. * Re: 8088 mph we break all your emulators Vas Crabb  04/09/15 06:32 AM
. * Re: 8088 mph we break all your emulators reenigne  04/09/15 05:47 AM
. * Re: 8088 mph we break all your emulators R. Belmont  04/09/15 11:49 AM
. * Re: 8088 mph we break all your emulators reenigne  04/09/15 12:06 PM
. * Re: 8088 mph we break all your emulators Olivier Galibert  04/10/15 03:22 AM

Extra information Permissions
Moderator:  redk9258, URherenow, Tafoid 
1 registered and 10 anonymous users are browsing this forum.
You cannot start new topics
You cannot reply to topics
HTML is enabled
UBBCode is enabled
Thread views: 3874