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From: rick@mips.UUCP (Rick Frazier)
Newsgroups: comp.sys.amiga
Subject: Re: EGA? CGA? gortklaatuGA? (Amiga compatable color monitors)
Message-ID: <785@mips.UUCP>
Date: Tue, 2-Dec-86 19:38:57 EST
Article-I.D.: mips.785
Posted: Tue Dec  2 19:38:57 1986
Date-Received: Wed, 3-Dec-86 06:18:51 EST
References: <5243@ukma.ms.uky.csnet>
Organization: MIPS ... where RISC is a way of life
Lines: 46

In article <5243@ukma.ms.uky.csnet>, sean@ukma.ms.uky.csnet (Sean Casey) writes:
> 	Inp connector:	9 pin (DB9)
> I have no idea if this is useable or not.  Where I work, we have a
> Masscomp RGB monitor (1024x1024 256 colors).  It has exactly four coax
> inputs: Red, Green, Blue, and Sync.  Why would you need nine?
 
nine pins aren't needed to supply the 5 lines that the amiga must send
(composite sync, analog r, g, and b plus ground), but the 9-pin d connector
(db9) happens to be a plentiful and inexpensive connector that you can get
nearly any place.  Likewise for a 25-pin d (db25) for rs-232 signals 
(only in sync communications does rs-232 need anywhere near 25 pins..)

The amiga puts out a pretty wide variety of signals, so it shouldn't
be too much trouble to get nearly any monitor to work with the right
cable, though the number of colors available are dependent upon the
set of signals you use.

standard connector:
analog r, g, and b signals
hsync* vsync* and composite sync *
"digital" r, g, b and i signals

rf modulator connector:
l, r, audio
composite video w/sync

If you want high resolution but don't mind monochrome, (to run word processing
or editing type applications, for example) just drop a mono monitor on the
composite port (the third of the video output connectors on the back)
and bang away at the old keyboard.  I've put a small monitor on this port
and run microemacs whenever I needed a screen with lots of lines (like 40+).

You can get (I think it's still available) a document from Commodore
that contains the schematics of the Amiga and specs for expansion for 
about $20 (if memory serves me right) that can help quite a bit in cases
like this.  I don't have the address any more (lost it, like most of my mind..)

good luck




-- 
--Rick Frazier--  DISCLAIMER: The above is individual opinion (the result of my
imperfect recall of facts, real or imagined) in no way representing anyone else.
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