LCD 512x384

#1 Thu, 29 Jan 2009 - 07:41 68kMLA

I have a 1024x768 LCD screen which I have connected to a KVM and then to a mac via a 10 switch vga-dongly-adapter..

Out of curiosity I tried using 512x384 mode and it came out crystal clear on the LCD screen. The other great thing is it's a simple multiple in both directions so doesn't look stretched.

The good thing is it means I don't have to find more VRAM to have more colours, just kick down to 512x384!

#2 Thu, 29 Jan 2009 - 08:02 68kMLA

What kind of LCD monitor is this?

#3 Thu, 29 Jan 2009 - 08:19 68kMLA

What kind of LCD monitor is this?

It's a "CyberHome TV/Monitor", so it will do PAL TV frequencies as well.

Normal VGA CRT's collapse in a heap when given 512x384, but I was most surprised and impressed.

#4 Sun, 1 Feb 2009 - 06:37 68kMLA

What Mac is driving it? What refresh rates (vertical and horizontal) is it pushing?

#5 Sun, 1 Feb 2009 - 07:15 68kMLA

What Mac is driving it? What refresh rates (vertical and horizontal) is it pushing?

A Q700, I will get round to testing my LC-II and LC-IIIs.

#6 Thu, 5 Feb 2009 - 14:03 68kMLA

That refresh rate info would be handy too, if you can track it down.

#7 Thu, 5 Feb 2009 - 18:44 68kMLA

That refresh rate info would be handy too, if you can track it down.

How would I know?

#8 Thu, 5 Feb 2009 - 21:40 68kMLA

The screen may be able to tell you in the OSD, that may be the quickest way to figure it out.

This page lists supported resolutions and associated bit-depths with various amounts of VRAM:

http://support.apple.com/kb/SP235

No refresh rates are listed, though.

#9 Fri, 6 Feb 2009 - 04:38 68kMLA

The Monitors control panel should tell you. You might have to tick the box to show all possible settings and not just the recommended ones. OTOH, ISTR that LCDs are all fixed frequency ...

#10 Fri, 6 Feb 2009 - 04:52 68kMLA

But the computer doesn't know that, it thinks it's an old Apple 512x384 colour screen.

I do know that if you try and drive the screen 1024x768 with anything other than 70hz the picture refuses to lock properly.

http://www.westwind.com/reference/tn/MacSyncAdapter.html

I'll put my money on 60Hz.