New monitors on old machines
Richard A. Cini
rcini at optonline.net
Wed Nov 1 19:53:09 CST 2006
I had an old Multi-Sync 2 monitor which had a 9-pin (DE9) for TTL and a 9-15
pin adapter dongle. I remember using it on an old IBM and a Compaq with a
VGA card. I know I don't have the monitor but I'll have to look in my
"stock" for the adapter and see what's in it.
You are right, though. The T2K sync frequencies are very low...26.4k I
think, but I'd have to check my notes.
Collector of classic computers
Lead engineer, Altair32 Emulator
Web site: http://highgate.comm.sfu.ca/~rcini/classiccmp/
Web site: http://www.altair32.com/
From: cctalk-bounces at classiccmp.org [mailto:cctalk-bounces at classiccmp.org]
On Behalf Of Chris M
Sent: Wednesday, November 01, 2006 8:31 PM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Re: New monitors on old machines
--- "Richard A. Cini" <rcini at optonline.net> wrote:
> I have a question. I'm getting a Tandy
> 2000 that doesn't have a
> color monitor (it comes with a VM-1 monochrome).
> I've read that you could
> use a third-party (i.e., non-Tandy) color monitor
> like the old NEC
> Multi-Sync, but I was wondering if a modern VGA
> monitor could be used if I
> made a 9-pin to 15-pin adapter.
> Thanks for any hints.
Sorry dude. The T2K and most things from that era
output ttl (digital) color information. Modern
multisyncs require analog input. Ain't happening.
Besides, modern multisyncs will probably only sync
down to original "low-res" VGA hsync frequencies
(31.5khz). The 2K outputs 24-26khz, I don't remember
exactly. There are a number of hurdles to overcome to
get something like that working with a modern monitor.
As a side note, I've requested info on the scan
doubler made by Princeton. It allowed you to use a CGA
card with one of their monitors that took ~400 lines
of res like a 2K. I guess it was a good idea for
people who had a CGA card, intended to upgrade it at
some point, but avoid obsolescence w/the monitor. The
reason I decided on buying a multisync right off.
I guess I could contact Princeton...
And the other thing that would be nice is a way to
convert a ttl signal to analog. Doesn't sound too hard
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