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Conference hydra::amiga_v1

Title:AMIGA NOTES
Notice:Join us in the *NEW* conference - HYDRA::AMIGA_V2
Moderator:HYDRA::MOORE
Created:Sat Apr 26 1986
Last Modified:Wed Feb 05 1992
Last Successful Update:Fri Jun 06 1997
Number of topics:5378
Total number of notes:38326

5327.0. "NEC 3D MultiSync -> Amiga connection" by KAOOA::TRIMBLE (Compiling finished: 65535 ERRORS!) Tue Jan 07 1992 17:09

    Hello everyone!
    
    	I just acquired a NEC 3D Multisync monitor (for a steal of a price!
    $375 CAN only 2 years old!) and need some help in hooking it up to my
    A2000 computer.  I do not have a Flicker Fixer or anything like that
    yet.  I would just like to use the monitor with the current modes of
    the 2.04 OS.
    
    	I've made a makeshift cable to connect the 6 pin DIN output of the
    monitor cable for my 1084S to the 15 pin mini D type connector of the
    NEC.  The thing is, is that I get a screen, but it seems to overlap
    itself.  What happens is that half of the screen looks fine, but the
    other half seems to 'wrap around' and is displayed on top of the first
    half.  This appears like a ghosted image.  
    
    	What am I doing wrong (that might be obvious), and where might I
    find a GOOD cable to connect the RGB output of the Amiga to the 15 mini
    D connector of the NEC?
    
    	Any help would be appreciated.
    
    
    P.S.  What video modes of the new 2.04 OS can I use with the ECS Agnus,
    but no ECS Denise???
    
    
    						Jason
    
    Internet: [email protected]
    VAX:      KAOOA::TRIMBLE
    DTN:      621-4202
                                              Thanx in advance! :-)
    
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5327.1Maybe a sync problem ??GIDDAY::MORANTue Jan 07 1992 23:0022
    Gidday Jason,
    
    I've seen something similar to the problem you have described. I had
    hooked a DEC VGA monitor to the Flicker Fixer output of my 3000. When
    the FF was enabled (31KHZ O/P) everything was OK. When I disabled
    the FF (15 KHz O/P) I had an image which wrapped around itself.
    
    With my multisync monitor hooked up everything went ok.
    
    Useually when a multisync monitor does not get any sync input there 
    is no display image at all. What _might_ be the case with the NEC
    multisync is rather than no image they default to standard VGA (31KHZ).
    
    Maybe check the sync line is hooked up correctly - From memory
    you need to hook up the horiz (or composite?) sync signal from the amiga
    to the sync input on the Mini D-15.
    
    
    Best of luck.
    
    Shaun.
    
5327.2No, I don't think so. Pins are connected.KAOOA::TRIMBLECompiling finished: 65535 ERRORS!Wed Jan 08 1992 09:3017
    G'day!
    
    	The pins I hooked up are the Vertical Sync, Horizontal Sync, red,
    green and blue wires, and of course ground (there were many ground pins
    on the 15 pin Mini... should I have connected all of these to ground?). 
    So I think I have what you said covered. 
    
    	So I don't think that is the problem.  I had a friend that told me
    that if I set the screen over to the right more (in preferences and
    with the monitor controls) this problem might go away.  I don't know. 
    I haven't had time to test that theory out much.
    
    	Anyone have any thoughts on my other question?
    
    
    						Jason
    
5327.3CAFEIN::KANOUSEKen Kanouse NJD SWSWed Jan 08 1992 13:382
    I thought that the NEC 3D needs the VGA scan rate which you don't get
    without a Flicker Fixer(31.5 Khz).
5327.4NEC 3D syncs 15Khz - 38KhzKAOOA::TRIMBLECompiling finished: 65535 ERRORS!Wed Jan 08 1992 16:247
    
    	No, the NEC 3D can sync from 15Khz to 38Khz.  Well within the
    frequencies produced by the Amiga with anything.
    
    
    					Jason
    
5327.5Flicker fixer the gap filler ?DUCK::NONDEPIl est des fois que je souhaite....Thu Jan 09 1992 06:364
    Does this meens that if I buy a flicker fixer for my Amiga500Plus I can
    use a Multi scan monitor with "30-60KHz" ?
    
    Thanks in advance, Patrick
5327.6Metoo, metoo!ATIS01::ASHFORTHThu Jan 09 1992 07:4518
I'll echo the question asked in the previous reply, and add another:

I've seen beaucoups notes regarding cable hacking required to connect some
monitors (mostly VR241). Given a compatible sync rate, does your "typical"
multisync monitor normally have the connectors needed to use a standard Amiga
or IBM-clone-type cable? If not, which do?

In a separate note I mentioned that I'm considering a rearrangement of my
computer setup. The reason for this is to accommodate the greater size of a
multisync monitor. Part of the plan for the multisync is to also add either a
desktop or notebook IBM-compatible.

I noticed in one of the multisync notes that at least one monitor has two sets
of inputs, making it a "natural" for this type of setup- which of the available
monitors known to "the net" are so equipped?

Thanks for all info-
	Bob
5327.7RE: .5 and .6KAOOA::TRIMBLECompiling finished: 65535 ERRORS!Thu Jan 09 1992 08:5120
    re: .5
    
    	The NEC 3D only SYNCs from 15Khz - 38Khz.  The flicker-fixer
    outputs at a frequency of 31.something Khz.  That is VGA frequency I
    believe.  So if your A500plus will take A2000 cards (I don't know if
    the flickerfixer is out for a standard A500) then yes, you can use a
    monitor which syncs from 15Khz-38Khz.  I know of no monitor which syncs
    much above 45Khz.
    
    Re: .6
    
    	The NEC 3D that I have has a 15 pin minisub D connector.  Basicly
    it's the same size as the mouse connector, but it's got 15 pins instead
    of 9.  As far as I know, a standard VGA card takes the straight 15 pin
    connector.  I don't know.  I don't know anyone which has a VGA card to
    see.
    
    
    						Jason
    
5327.8You could buy a custom cableLODGE::LENDavid M. LenThu Jan 09 1992 18:5514
    I managed to hack a cable to drive my NEC Multi-sync II.  But I still
    bought a cable from Redmond to replace it.  At $35.00 + shipping I
    don't call it cheap, but it was worry free.  Redmond ususlly has adds
    in Amiga World and other magazines.
    
    A couple side notes:
    
    1) When I hacked up the cable, I could NOT get it to work using the
    separate vertical and horizontal sync lines.  But when I used the
    single composite sync line it worked fine.
    
    2) When I got the A2320 Display Enhancer, I was able to use the
    standard cable that came with the NEC II.
    
5327.9Thanx I'll check it out but...KAOOA::TRIMBLECompiling finished: 65535 ERRORS!Fri Jan 10 1992 09:1317
    re: -.1
    
    	Thanx for the info.  I'll check my latest AmigaWorld for the
    company.
    
    	In regards to your hacked cable: I take it you hooked the monitor
    directly up to the RGB out of the Amiga (the RGB port)?  The cable I
    made simply hooked the monitor's cable up to the 6 pin DIN of my 1084
    cable attaching the respective pins to where they should go.  Should I
    abandon this and make the cable to the port itself, hooking up the
    composite sync?
    
    
    						Jason
    
    Thanx for the info!  :')
    
5327.10LODGE::LENDavid M. LenSat Jan 11 1992 23:076
    Yes, my cable was from the A2000 RGB port (the DB23 video connector) to
    the NEC.
    
    I have never worked with a 1084 (or any other Commodore monitor), so I
    don't know about the 6 pin DIN that you are referring to, so  I don't
    think that I make any reccomendation about that connection.