Atari ST / TT / Falcon Resolution Timings and Frequencies

[Icky]

I have been trying to find out resolutions and timings for the Atari ST / TT & Falcon so far this is what I have collated from the inter web.

I am interested to find out the horizontal and vertical frequencies for each resolution. If anyone has any details they can share I would appreciate it?

Below is a table of resolutions and depth for the 3 machines:

Depth (bits)	320x200	320x480	320x480	640x400	640x480	896x608	1280x960
1	-	-	-	ST-High	VGA-2	Falcon-H2	TT-High
2	-	-	ST-Med	-	VGA-4		-
4	ST-Low	-	-	-	TT-Med / VGA-16	Falcon-H16	-
8	-	TT-Low	-	-	VGA-256	-	-

Below is a table of resolution timings - this one is missing a few resolutions:

Name	Resolution	Dot Clock	Horizontal Timings	Vertical Timings	Extra Info
ST-High	640x400	25.175	640 664 760 800	400 409 411 450	-
Falcon VGA	640x480	31.5	640 680 720 864	480 488 491 521	-
ST-Low	320x200	12.588	336 384 400 200	200 204 205 225	Double Scan
TT-Low	320x480	15.175	320 336 384 400	480 450 450 460	-
TT-High	1280x960	120	1280 1312 1456 1712	960 963 970 980	-

[czietz]

Where did you get those values? The ST-High timings are definitively wrong -- I stopped reading after that, so I don't know about the rest of them. What you quote as "ST-High" seems to be the timing of a 640x400 VGA mode instead.

[Petari]

Of course, timing depends from is Falcon connected to VGA monitor, or to RGB monitor/TV . And in second case depends from used color encoding mode - is PAL or NTSC. So, for some resolutions there are actually 3 timings.
You should make separate tables for diverse machines.
ST med: 320x480 - what the Hell ? ST med is same res. on all machines. Your tables are mess.

[exxos]

Yes - Let me sort this out a bit and hopefully Exxos will help update the first post.

Sure :) just post the new table when ready and give me a shout (or any moderators can edit the post).

[frank.lukas]

All Atari TT modes are at VGA 31,5Mhz Pixel Clock except TT-High 1280x960 at 128Mhz Pixel Clock.

Mega ST with Atari Viking Graphiccard and Atari SM194 is 1280x960 at 110Mhz Pixel Clock.