Monitor and BB/VGA?
13 messages in this thread
I am negotiating with a gentleman on the purchase of a Seiko multisynch
monitor (I forgot the model #) and A2320 for my A2000. The monitor synchs
at 31-40 MHz. I also intend to get a Bridboard, VGA card and monitor
switchbox in order to use the monitor with both. I assume this monitor
monitor will work fine with a VGA card, but would like to know for sure.
Thanks….
I don't know awhole lot about these things but it's my understanding that
you need a monitor that will go down to 15 Hz to use all display modes of
the Amiga. There was an article in AmigaWorld I believe that indicated
this.
Ronnie,
Well, the way I understand it, (Somebody correct me if I am wrong) you
need a monitor that goes down to 15 Hz if you are not using deinterlacer
circuitry, i.e a flixer fixer or the A3000's on board deinterlacer. The
deinterlacer duffers the Amiga's 15 Hz output and outputs at other freqs.
But, if you have an AGA machine, that uses custom chips that can output
at several frequencies, you need a Multisynch that goes down to 15 Hz to
get all modes.
I guess I am still a little confused. Are us saying that with a
flickerfixer but using the normal (noninterlaced) modes of the AMIGA 2000 I
do not need a 15 Hz monitor? My interest is in finding a monitor that will
work with a flicker fixer, all Amiga display modes as well as a BridgeBoard
VGA display. For this I really thought I need to get down to 15 Hz.
Ronnie,
To use all Amiga modes, you'll need a multi-sync that works at least down
to 15.75 kHz, and a flicker fixer with it to deinterlace when using the
interlace modes. You can use a 15.75kHz multi-sync without the FF in all
modes, but it will act like an 1084 monitor.
chris
Chris,
I thought that since a flixer-fixer took output right off the video bus
and buffered it for output at different frequency, that 15.75 KHz was not
required for all video modes on a non AGA machine.
I know that 15.75 KHz is required for AGA machines to work in all Amiga
video modes, but they ain't using a buffer.
Michael,
I can't recall the exact content of the post I replied to, my history file
has been pruned, but I believe it was in reference to 'can a multi-sync
monitor be used without a flicker-fixer'. The answer that I have learned
from all the threads about M-S monitors and flickerfixers was YES as long
as it supported the 15.75 Khz scan rate of the RGB port, but that it would
still show the flicker in interlaced modes. Now I use a FF and a 15 kHz
able multi-sync, but have never connected directly to the RGB output, so I
can't answer absolutely that I've tested the info. So, I'll say that, and
leave it open for discussion.
Chris
Chris,
Yes, I agree that a multisynch hooked up to an Amiga w/o a flixer fixer
must sync to 15.75 Khz. Maybe I misunderstood the question.
Ronnie,
See my responce to Chris….
I was still a bit confused so I went back to previous issues of AmigaWorld
and Amazing Computing. This is what I understand from articles there.
The standard AMIGA graphics modes (BAGA – before AGA) display at a
horizontal scan rate of 15.75 KHz. Certain display enhancers such as the
Flicker Fixer double the horizontal scan rate to 31.5 KHz. With a Flicker
Fixer ALL of the AMIGA graphics modes go through the FF to display 400
lines at 31.5 KHz. If you want to use a flicker fixer AND be able to go
back to the standard AMIGA RGB output you need a multisync that will scan
from 15.75 KHz up to 31.5 KHz.
I'm still a little uncertain about a BridgeBoard/VGA output. I know it can
be used with the same multisync monitor as a flicker fixer but I'm not sure
what scan rate or what type of input is needed on the monitor. Can anyone
shed any light on this?
– via Whap!
Thanks for the info. A freind of mine read me portions of the same article
and it helped out a lot.