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bearhugs28
Junior Member


USA
117 Posts
Posted - 29 Sep 2002 :  07:32:31
http://wired.hard.ru/data/pin_MacVideoToVGA.shtml

Can i just wire the connectors acording to ths list and use my PC monitor ?

Bert

ehurtley
New Member


USA
63 Posts
Posted - 29 Sep 2002 :  15:37:10
quote:

http://wired.hard.ru/data/pin_MacVideoToVGA.shtml

Can i just wire the connectors acording to ths list and use my PC monitor ?


Almost. Your video card would have to support PC multisync monitors without and adapter. (Most NuBus video cards do not support PC monitors without a translator chip that is in most converters. That's also why some converters have dip switches. You fake it by telling the Mac that the PC monitor is a specific Mac monitor.)

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Trash80toG-4
NIGHT STALKER


USA
2899 Posts
Posted - 29 Sep 2002 :  15:44:17
quote:

Most NuBus video cards do not support PC monitors without a translator chip that is in most converters. That's also why some converters have dip switches. You fake it by telling the Mac that the PC monitor is a specific Mac monitor.


I've never heard of a chip in a converter, the ones I've seen are just switched connections to pull the sense pin signals high or low to encode the monitor type. It'd be easy to do using a ROM set up as an array of gates with fewer switches tho, so I wouldn't be surprised to find a chip in a lot of converters. AFAIK you can do anything any given VGA converter can do by shorting the proper lines together for any single resolution. Does that sync on green nonsense require more than that if you want to get around it?

jt .
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dunbar
New Member


USA
87 Posts
Posted - 30 Sep 2002 :  06:14:10
I'm interested here as well: eMachines to SVGA, Q650 to anything which is non mac, RGB to Q650/Pmac7500-100 (a major error on my part, I agree).

One neat link I've found which describes which sense pins are where:
http://www.hardwarebook.net/ Hurry, this site always looks like it may tank at any moment... looked this way for the last 3 years, though.Go to Top of Page

~Coxy
Leader, Tactical Ops Unit


Australia
2822 Posts
Posted - 30 Sep 2002 :  06:24:00
In Australia, we can walk into any Jaycar or Altronics store and pick up a neato Mac->VGA converter for under 15 bucks.

~Coxy - Leader, Tactical Operations Unit
Mayor of NuBus City v3.0
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shaktiman
Senior Member


United Kingdom
1226 Posts
Posted - 30 Sep 2002 :  07:56:07
My Quadra 840av is attatched to my pc's old monitor, an svga Compaq 140.

I bought an SVGA adapter to make this possible which cost me about 8.

unless I'm mistaken, VGA came before SVGA & VGA is a simple RGB connection.

I'm not the monitor expert but how complicated can the VGA be? well with the computer industry based on logic & compatibility as it was(not!) it shouldn't be a problem.

shaktiman

Quadra 840av, 128MB ram, 2MB vram, cd drive(caddy),1 caddy!:-)
1.2 gig drive, 4.23 gig drive
3 monitors 15" & 14" & 14" os 8.1 56k modem,
Stylewriter 1200, Umax 1220s scanner
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markymark
Junior Member



223 Posts
Posted - 10 Nov 2002 :  00:25:40

Yes you can do a DIY mactovga adapter.

I've done one myself and I've also modified it for the ridiculous connector used by the 6100 PPC macs etc.

If you try to use a Mactovga adapter on the MacII models you need to get one that can sync on green or you can use a non sync on green adapter with a NEC MultiSync Monitor.

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~Coxy
Leader, Tactical Ops Unit


Australia
2822 Posts
Posted - 10 Nov 2002 :  18:56:58
shakti, when we say Mac -> VGA we mean DB-15 to HDI-15, ie. VGA as in the style of connector.

~Coxy - Leader, Tactical Operations Unit
Mayor of NuBus City v3.0
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