Various resolutions used in video game monitors...

[ST Dragon]

I just came across this info on: "various resolutions used in video game monitors".
It does mentions:

ATARI GAMES VIDEO STANDARDS

though...
Correct me if I'm wrong, but I don't most Arcace shooters, NEOGEO & CPS-1/2, use the same also?

http://www.klov.com/monitor.html#M

Monitor Types
The following are the various resolutions used in video game monitors. The information below was included in an article by Randy Fromm which was published in the August 1994 issue of RePlay Magazine on page 82.


ATARI GAMES VIDEO STANDARDS


STANDARD RESOLUTION

HORIZONTAL VERTICAL
Scan Frequency: 15.72 KHz Scan Frequency: 60.0 Hz
Scan Period: 63.6 µSec Scan Period: 16.7 mSec
Active Video: 46.9 µSec Active Video: 15.3 mSec
Video Delay: 11.9 µSec Video Delay: 1.2 mSec
Sync Pulse: 4.7 µSec Sync Pulse: 0.2 mSec
Scan Line: 456 Pixels Screen: 262 Lines
Resolution: 336 Pixels Resolution: 240 Lines
Clock Freq: 7.16 MHz


EXTENDED RESOLUTION

HORIZONTAL VERTICAL
Scan Frequency: 16.50 KHz Scan Frequency: 53.0 Hz
Scan Period: 60.6 µSec Scan Period: 18.9 mSec
Active Video: 48.0 µSec Active Video: 17.4 mSec
Video Delay: 11.9 µSec Video Delay: 1.2 mSec
Sync Pulse: 3.9 µSec Sync Pulse: 0.2 mSec
Scan Line: 646 Pixels Screen: 312 Lines
Resolution: 512 Pixels Resolution: 288 Lines
Clock Freq: 10.67 MHz


MEDIUM RESOLUTION

HORIZONTAL VERTICAL
Scan Frequency: 25.00 KHz Scan Frequency: 60.0 Hz
Scan Period: 40.0 µSec Scan Period: 16.7 mSec
Active Video: 32.0 µSec Active Video: 15.4 mSec
Video Delay: 7.2 µSec Video Delay: 1.2 mSec
Sync Pulse: 4.0 µSec Sync Pulse: 0.2 mSec
Scan Line: 640 Pixels Screen: 416 Lines
Resolution: 512 Pixels Resolution: 384 Lines
Clock Freq: 16.00 MHz


VGA20 RESOLUTION

HORIZONTAL VERTICAL
Scan Frequency: 31.55 KHz Scan Frequency: 70.0 Hz
Scan Period: 31.7 µSec Scan Period: 14.3 mSec
Active Video: 25.6 µSec Active Video: 12.2 mSec
Video Delay: 5.7 µSec Video Delay: 1.1 mSec
Sync Pulse: 4.0 µSec Sync Pulse: 0.2 mSec
Scan Line: 634 Pixels Screen: 450 Lines
Resolution: 512 Pixels Resolution: 384 Lines

[D]

No various systems use various resolutions.
I know CPS2 has got a differing resolution.
NEO GEO has got pretty low resolution.
Seibu has different Resolution.

I guess the standard resolution for arcade games is 320 X 240, right?

*waiting for someone to set this straight as I am more curious than the thread poster*

[ST Dragon]

Well, it does state "ATARI GAMES VIDEO STANDARDS" so I guess these resolutions are referred to the weird looking Arcade Atari resolutions.
In most 80's Atari Arcades, the perspective looks like shit imo.

But anybody with a more knowledgeable background on this subject, is welcomed to post his facts.

I love the resolution in IREM’s M72/82/92 arcade hardware. The game pixels look very sharp!
These games in particular:
(R-Type 2, R-Type LEO, Gallop - Armed Police Unit / Hammerin' Harry, X-Multiply, Air Duel, In The hunt, Under Cover Cops)

[ED-057]

The vertical resolution and refresh rate depend on what the monitor itself supports. That ATARI GAMES VIDEO STANDARDS is the specs for different monitors (notice they all have different scan rates). The first one is the same as an NTSC TV, the last one is the same as standard VGA. On a given monitor you can use a different pixel clock and get a different horizontal resolution though. For example, Atari uses 7.16MHz for a 336-pixel-wide display on a 15KHz monitor but the NES uses 5.37MHz (256 pixels), the Genesis uses 6.7MHz (320 pixels), CPS1 is probably around 8MHz (384 pixels), etc.