12 Apr
2013
12 Apr
'13
4:38 p.m.
On 2013 Apr 12, at 11:28 AM, Jules Richardson wrote:
On 04/11/2013 05:33 PM, David Riley wrote:
Here are some schematics for video adapters I have used with 90s-era
Macs.
http://www3.telus.net/~bhilpert/tmp/videoAdapters.pdf
The first one is one of those with the DIP switches on the adapter.
The last one is a homemade cable (15-pin-Mac)-to-VGA cable that I use
with a VGA LCD, essentially the same as the first one but with a hard-
wired display code.
(Also there is VGA to Sun adapter - for a while I used two chained
adapters to drive a Sun 19-inch monitor from a Mac G3.)
The absolute best adaptor to
use, if you can find it, is the Griffin MacPnP adaptor, which has
a bank
of DIP switches to set the monitor sense codes (necessary for older,
more finicky Macs) and/or pass the DDC lines through. I have a
number of
Mac/VGA adaptors, some of which just pass the sense lines through
verbatim and some of which have the sense code hard wired to what the
manufacturer thought was right (for example, a 1024x768 VGA
monitor came
with an adaptor that was hard-wired to declare that it only supported
640x480 and 832x624).
Hmm, I'd assume that in the absence of any DDC info it'll default
to some crappy resolution rather than outputting nothing, surely?