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- Path: cph-1.news.DK.net!dkuug!dknet!dkbbbs!peter.larsen
- From: peter.larsen@dkb.dk (PETER LARSEN)
- Newsgroups: comp.sys.amiga.misc
- Subject: Re: HELP with Monitor Hack!
- Message-ID: <8BEF0C8.119900172B.uuout@dkb.dk>
- Date: Fri, 19 Apr 96 03:20:00 +0100
- Distribution: world
- Organization: Danish Key Board BBS - Copenhagen Denmark - +45 3325 5600
- Reply-To: peter.larsen@dkb.dk (PETER LARSEN)
- References: <Dq0u5F.5I1.0.sheppard@torfree.net>
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-
-
- Hi Brent Santin,
-
- BS> Please help me with a monitor Hack. I've really been impressed with
- BS> the helpfulness and knowledge of the Amiga community. Here's my
- BS> situation:
-
- Hmm ... I can imagine you sitting there, no flicker when you look on the
- screen, but the world flickers when you look elsewhere .... and you just
- bougth another 5 stone bag of OEM aspirin wholesale ....
-
- BS> I have an Amiga 2500 ECS with a 1084S monitor. I use Hi-Res
- BS> interlace mode all the time and would like to reduce the flicker (I
- BS> can't afford a flicker fixer or multisync monitor).
-
- Are flicker-fixers really that hard to find second hand? - a multisync
- isn't needed with a flicker-fixer, usable choices start with a decent
- monocrome standard VGA-monitor, but some picture-size adjustment may be
- needed, less probable for you in as much as you probably use NTSC-
- screenmode already, and that is the update-frequency a standard VGA-
- monitor expects.
-
- BS> o, I've
- BS> downloaded several monitor hacks, such as NT-70 and ITAL36. These
- BS> are modified drivers that I believe increase the scan rate to 71 Hz
- BS> and reduce flicker. I've seen the results of this on my friend's
- BS> Amiga and it looks good, his hardware setup is a little different
- BS> than mine though, so I can't ask him for help.
-
- Sorry mate, you'd still be buying aspirin wholesale, in fact the saving
- you will make on aspirin within 6 months should pay for a flicker-fixer
- and a VGA colour monitor, standard VGA will do just nicely, but you may
- have to poke around with the picture-adjustments inside, if they are not
- external, and there are some caveats about that, goof and you could die
- from a high voltage shock. So monitors with external picture size
- adjustment recommended.
-
- BS> Anyway, the docs for ITAL36 and NT70 say that this hack works on a
- BS> 1084 monitor.
-
- There is no such thing as a standard 1084, it could come from perhaps
- three different philips factories, and there must be a larger number of
- actual hardware-versions. Mine topped out at some 63 Hz when I tried
- playing with a scan-rate util for AmigaDos 1.3 that came with my
- Macrosystems Deinterlace-card. Basicly that one and the CBM (was it
- A2230?) were the all around best in a test made by the german Amiga
- Magazin, and it was available mail-order - CBM had at that time so big a
- back-log on their own, that you couldn't even order them for later
- delivery.
-
- BS> I've installed the hacked monitor drivers, and
- BS> installed the new screenprefs and monitorprefs (or whatever). When
- BS> I activate the hacked driver, the screen just flips around like
- BS> crazy. Does anyone know how to use these hacked drivers correctly
- BS> with a 1084S???? I'd REALLY REALLY like to know.
-
- Generically speaking the 1084s has a reasonable multisync-range, it will
- handle from slightly above I think it was 45 Hz up to slighly above 63
- Hz, but if it won't sync to it, then it just can not do it. In as much
- as it is a fixed frequency monitor it is quite capable in terms of
- multisync'in, but there are limits. These limits probably even differ
- from monitor to monitor.
-
- BS> The docs do say that you might have to play with your Vertical Hold
- BS> a little bit. The 1084S doesn't have a Vert. Hold. knob. Is there
- BS> an adjustment knob inside the monitor that I could adjust with a
- BS> screwdriver if I opened it up? I think this MIGHT be the problem,
- BS> becuase the screen is flipping vertically, as well as looks
- BS> messed-up.
-
- Hmmm ... there probably is, but first re-read the caveat above, and btw.
- it is atrociously difficult to open, almost as if they didn't intent the
- user to be able to guess how. But re-read that caveat, and I'll go
- looking on my bookshelf in the meantime, I ought to have the booklet
- that came with it. Btw. - it died not too long after I accidentally and
- foolishly fed it a VGA-type productivity signal, if you exceed its
- capabilities the deflection coils may overheat, and its life-time
- expectancy fall .... sorry, booklet not found, but there is one
- adjustment inside it as I recall the diagram in the booklet, and that
- probably is vertical hold. But I'd advice against it anyway, you would
- be forcing it to the edge of what it can do, and if you can't afford an
- 'el cheapo' brand standard VGA monocrome second hand and a flickerfixer,
- then you also can not afford taking any chances with the monitor you
- have. Mostly I just use a Commodore 1403 on my deinterlace-card, and an
- 8833 if I need to really see the colours.
-
-
- Kind regards
-
- Peter Larsen
-
-
-
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