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- From: smckinty@sunicnc.France.Sun.COM (Steve McKinty - Sun ICNC)
- Newsgroups: comp.sys.amiga.hardware
- Subject: Re: A500+ and I*M monitors - flicker?
- Message-ID: <1k8qgoINNj9h@grapevine.EBay.Sun.COM>
- Date: 28 Jan 93 14:27:36 GMT
- References: <1993Jan28.122434.2307@unix.brighton.ac.uk>
- Sender: smckinty@France.Sun.COM (Steve McKinty - Sun ICNC)
- Distribution: world
- Organization: SunConnect
- Lines: 35
- NNTP-Posting-Host: hardy.france.sun.com
-
- In article <1993Jan28.122434.2307@unix.brighton.ac.uk>, cje@unix.brighton.ac.uk (evans) writes:
- > I'm sure this a FAQ, but I've scanned this group for several weeks and
- > not seen the answer to my query which is...
- >
- > I've been given an I*M monitor which I assume is CGA; I've made the cable,
- > which I'm sure is O.K. as I've got the wiring diagrams but ...
- >
- > THE DISPLAY IS UNREADABLE!!!
- >
- > If there were such a thing as diagonal hold I would be able to see the
- > display clearly (get the picture ;-)).
- >
- > I'm vaguely aware of something called a 'flicker-fixer' ... is this
- > what I need, if so, where can I get one, how much does it cost etc.??
-
- No, you don't need a flicker-fixer. You need the sync pulses inverted
- between the Amiga & the monitor. The Amiga uses normal active-high
- syncs (at least partly to make genlocking easier), but the PC uses
- active-low.
-
- If you are careful with a soldering iron, you can just squeeze a 7400-series
- invertor into a 23-pin D-type. I think I used a 74LS38 (or maybe a 37, check
- a databook first!). You can get the 5v supply off one of the other pins
- on the video port.
-
- Steve
-
- PS The flicker-fixer is a scan-doubling unit, it removes the interlace flicker
- but needs something like a VGA monitor for output.
-
- --
- Steve McKinty
- SUN Microsystems ICNC
- 38240 Meylan, France
- email: smckinty@france.sun.com BIX: smckinty
-