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- Path: kimberley.sxb.bsf.alcatel.fr!news
- From: strigl@sxb.bsf.alcatel.fr (Dominique STRIGL)
- Newsgroups: comp.sys.amiga.hardware
- Subject: Re: Custom monitor drivers
- Date: 19 Jan 1996 12:31:36 GMT
- Organization: Alcatel Business Systems, Illkirch, France
- Distribution: world
- Message-ID: <4do2v8$da5@kimberley.sxb.bsf.alcatel.fr>
- References: <4dih4d$cqm@osfb.aber.ac.uk>
- Reply-To: strigl@sxb.bsf.alcatel.fr
- NNTP-Posting-Host: gibi.sxb.bsf.alcatel.fr
-
- In article <4dih4d$cqm@osfb.aber.ac.uk>, dbt3@aber.ac.uk (Dominic Tristram) writes:
- > :
- > :A couple of days ago I posted a request for info about a
- > :19 inch IBM monitor (5081 19). I now know a fair bit about
- > :it, but I have a couple of questions about connecting it
- > :to my 1200.
- > :
- > :The monitor has a fixed-scan rate of 60Hz and a resolution
- > :of either 1028x1024 or 1024x768. What I would like to know
- > :is can I make my 1200 chuck this signal out? Is there a
- > :monitor driver I can just stick in my devs drawer (which I
- > :doubt), or could I use something like a custom monitor
- > :driver program to do this? If so, could anyone recommend
- > :one? My Microvitec 1438 doesn't worry about that sort of
- > :thing...
- > :
- > :Another thing is that the IBM monitor chucks its sync info
- > :out on the green data line. Does anyone have any idea how
- > :I'd wire the Amiga 23-pin video to three BNC connectors?
- > :I would guess that the Read Green and Blue lines go
- > :straigt to the appropriate connectors on the monitor, but
- > :would the sync line just be a connection onto the green
- > :line??? Help!
- > :
- > :BTW, I've been told the cables are RG-59/U type, if this
- > :helps...
- > :
- > :Cheers,
- > : Dominic
- > :
-
- Hi,
- I tried with a Hitachi 21 monitor (SUN old material) which also have fixed
- frequencies :
- vertical : 66 Hz
- horizontal : 61,4 KHz
- 5 BNC :
- 1 red, 1 green, 1 blue
- 1 Horizontal, 1 Vertical.
-
- The first problem was the Input Impedance of the monitor. It was 75 Ohm
- but the Amiga isn't able to drive it. Fortunaltely there were a switch
- beside each color which gave the possibility to have a High Impedance
- Input -> this gaves the possibility to display the right colors.
-
- I).
- I tried on a A1200 but I have only a BIG Workbench screen but no all the
- WB screen was accessible(vertical freq ~ 6-KHz with MonEd)
- ____________________
- | _______________|__
- | | WB screen | |
- | | | |
- | |_______________|__|
- | 21' Screen |
- |___________________|
-
- But I was not able to do better.
- CONCLUSION => I can't use it.
-
- II).
- A other test was done with a A4000 and a CyberVision64
- After two hours (-without any documentation) I achieved
- to got a 1152 x 832 screen.
- The only problem was, that each time I reboot the A4000
- I lost the vertical synchronisation and have to adjust
- it again.
- CONCLUSION => so I can't use it.
-
- If somebody have a idea .... ?
-
- Dominique Strigl - Alcatel Business Systems - HardWare Designer
- Email : strigl@sxb.bsf.alcatel.fr
-
-
-