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GeorgeF
*nix forums beginner
Joined: 28 Mar 2005
Posts: 9
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 Posted: Mon Mar 28, 2005 1:57 am Post subject:
Re: SGI Monitor question
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try this link:
http://ivanl.host.sk/gdm20d11/
gf.
PS... it is quite simple.....
"Jonathan" <jonny_morrisuk@yahoo.co.uk> wrote in message
news:f6895097.0503090311.7e9802d3@posting.google.com...
| Quote: | The monitor can also be modified internally to connect the H & V sync
leads
I found a pretty good mod guide for this monitor to make it work with
a PC, unfortunately I've long since lost the link but I assume it will
still be out there somewhere... it contained brilliant step by step
photographs too. Only problem I encountered was that it required a
fully connected SGI cable (which I didn't have), so I had to pull the
signals from another point on the circuit board and used a couple of
the unconnected pins in my cable. The results were usable, but the
picture was shifted over to the left so you had to adjust the screen
settings on the monitor, also the max resolution I could get out of a
PC with this monitor was 1024x768, and had a darkish tinge but wasn't
too bad really. That particular monitor has been in use up until
about two weeks ago, and from what I gather is still going strong!
Oh, and rather than chop up the nice SGI cable I got a 13W3 connector
off a broken Extreme board (any old SGI graphics board should do) and
a VGA lead off a broken PC monitor and wired them up together
according to the cable specs for each. These went into a little
project box so I had a neat solution. Good soldering skills are a
must though as the signals need to be clean, and you don't want bits
of old solder dropping into the circuitry! Also monitor safety is a
big issue too as there's a heck of a lot of volts flying around a huge
monitor like that, even after it's been turned off (the tube is
basically a huge capacitor - just don't touch it or the circuit board
pins with your fingers!). |
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GeorgeF
*nix forums beginner
Joined: 28 Mar 2005
Posts: 9
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| Posted: Mon Mar 28, 2005 1:55 am Post subject:
Re: SGI Monitor question
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HI...
try this link....
http://ivanl.host.sk/gdm20d11/
gf.
PS. It was quite easy....
<axsdeny@gmail.com> wrote in message
news:1110238063.152529.106400@f14g2000cwb.googlegroups.com...
| Quote: | I've got a 19 inch SGI monitor (model GDM-20D11) that a friend gave me
along with an Indy and an Indigo2. I have an adapter that goes from
SGI -> VGA so that I can hook the monitor up to my machine. I'm running
Mac OS X 10.3.8 on a dual processor G4 machine. I'm unable to get the
SGI monitor to come out of "amber" mode.
Pictures of the monitor and the adapter can be seen here:
http://vaxcave.com/index.php?p=310
Does anyone have any ideas in getting this monitor to go live? Any help
is appreciated. Sorry for storming your group for answers, I'm not
getting much help anywhere else. :-\
-Dave
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jonny_morrisuk@yahoo.co.u
*nix forums addict
Joined: 18 May 2005
Posts: 64
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| Posted: Wed Mar 09, 2005 10:16 am Post subject:
Re: SGI Monitor question
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Aside from modding it, it may be far far easier to spend maybe 80 quid
on a dual input model and connect it straight up to your SGI and/or
Mac. I found it quite amusing that a 20" VGA monitor is still highly
sought after, whereas the (probably higher quality) dual input SGI
monitors are cheap as chips! |
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jonny_morrisuk@yahoo.co.u
*nix forums addict
Joined: 18 May 2005
Posts: 64
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| Posted: Wed Mar 09, 2005 10:11 am Post subject:
Re: SGI Monitor question
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| Quote: | The monitor can also be modified internally to connect the H & V sync leads
|
I found a pretty good mod guide for this monitor to make it work with
a PC, unfortunately I've long since lost the link but I assume it will
still be out there somewhere... it contained brilliant step by step
photographs too. Only problem I encountered was that it required a
fully connected SGI cable (which I didn't have), so I had to pull the
signals from another point on the circuit board and used a couple of
the unconnected pins in my cable. The results were usable, but the
picture was shifted over to the left so you had to adjust the screen
settings on the monitor, also the max resolution I could get out of a
PC with this monitor was 1024x768, and had a darkish tinge but wasn't
too bad really. That particular monitor has been in use up until
about two weeks ago, and from what I gather is still going strong!
Oh, and rather than chop up the nice SGI cable I got a 13W3 connector
off a broken Extreme board (any old SGI graphics board should do) and
a VGA lead off a broken PC monitor and wired them up together
according to the cable specs for each. These went into a little
project box so I had a neat solution. Good soldering skills are a
must though as the signals need to be clean, and you don't want bits
of old solder dropping into the circuitry! Also monitor safety is a
big issue too as there's a heck of a lot of volts flying around a huge
monitor like that, even after it's been turned off (the tube is
basically a huge capacitor - just don't touch it or the circuit board
pins with your fingers!). |
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Tony 'Nicoya' Mantler
*nix forums Guru Wannabe
Joined: 02 Jul 2005
Posts: 139
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| Posted: Tue Mar 08, 2005 5:20 pm Post subject:
Re: SGI Monitor question
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In article <74mdnTbaxY3rV7DfRVn-oA@megapath.net>,
"Ed Hall" <ehall@ultraspec.com> wrote:
: it MAY also generate the old mac sync-on-green.
Old macs never used Sync-on-green.
Cheers - Tony 'Nicoya' Mantler :)
--
Tony 'Nicoya' Mantler -- Master of Code-fu -- nicoya@ubb.ca
-- http://nicoya.feline.pp.se/ -- http://www.ubb.ca/ -- |
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Ed Hall
*nix forums beginner
Joined: 26 May 2005
Posts: 10
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| Posted: Tue Mar 08, 2005 2:55 pm Post subject:
Re: SGI Monitor question
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That monitor only works with sync-on-green. IF you can use another monitor
to manually force the Mac into an old Mac mode, 1152 x 870 @75HZ, it MAY
also generate the old mac sync-on-green. Not too likely, but a remote
possibility.
The monitor can also be modified internally to connect the H & V sync leads
out to the 13W3 connector. (The wires are not physically connected, but the
sync circuits are on the board internally) Google for info, but be aware
that a LOT of misinformation exists on this subject. A good monitor repair
shop should be able to make the mod work, for a price. Another problem if
you take this approach is that the sgi 13W3 cables also don't connect the
sync lines through the cable. So you will need a different adapter that will
plug into the 13W3 connector on the monitor and use a high quality male to
male VGA (HD15) cable. You will need to make sure the adapter connects the
sync lines to the same pins as are connected to the 13W3 connector on the
monitor by the mod shop.
An even better alternative is to donate or dump that monitor and get a newer
one. It has scan range limitations and is already 10 years old, who knows
how many hours it has on it. You may go to a lot of trouble and expense to
find out that the monitor is ready to die anyway...
If it were me, I would try setting the mode on the Mac, if that didn't work,
I would get a different monitor that will work with the sync-on-green from
the sgi's and also work with separate syncs for the mac.
Good luck.
Ed (the cable geek)
<axsdeny@gmail.com> wrote in message
news:1110238063.152529.106400@f14g2000cwb.googlegroups.com...
| Quote: | I've got a 19 inch SGI monitor (model GDM-20D11) that a friend gave me
along with an Indy and an Indigo2. I have an adapter that goes from
SGI -> VGA so that I can hook the monitor up to my machine. I'm running
Mac OS X 10.3.8 on a dual processor G4 machine. I'm unable to get the
SGI monitor to come out of "amber" mode.
Pictures of the monitor and the adapter can be seen here:
http://vaxcave.com/index.php?p=310
Does anyone have any ideas in getting this monitor to go live? Any help
is appreciated. Sorry for storming your group for answers, I'm not
getting much help anywhere else. :-\
-Dave
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axsdeny@gmail.com
*nix forums beginner
Joined: 07 Mar 2005
Posts: 1
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| Posted: Mon Mar 07, 2005 10:27 pm Post subject:
SGI Monitor question
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I've got a 19 inch SGI monitor (model GDM-20D11) that a friend gave me
along with an Indy and an Indigo2. I have an adapter that goes from
SGI -> VGA so that I can hook the monitor up to my machine. I'm running
Mac OS X 10.3.8 on a dual processor G4 machine. I'm unable to get the
SGI monitor to come out of "amber" mode.
Pictures of the monitor and the adapter can be seen here:
http://vaxcave.com/index.php?p=310
Does anyone have any ideas in getting this monitor to go live? Any help
is appreciated. Sorry for storming your group for answers, I'm not
getting much help anywhere else. :-\
-Dave |
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