Re: anoyne know how to hook up a IIgs 13" to a mac?

[khym@bga.com (Khym Mahn)]

In article <3336mt$qv4@gap.cco.caltech.edu>,
Nathan Mates <nathan@cco.caltech.edu> wrote:
>In article <NAGENDRA.94Aug19144117@csa.bu.edu>,
>nagendra mishr <nagendra@csa.bu.edu> wrote:
>
>>I've got a 13" apple monitor lying around and I wanna hook it up to my mac..

>   Don't bother, unless you're a real hardware hacker, and can open
>up a monitor, and adjust its horiz-sync with your teeth. (Disclaimer:
>DON'T try this at home; the smell would take forever to get out) Macs
>want a much higher h-sync pulse, something like 13-15 Hz if I remember
>right, and the GS & its monitor want a 30Hz one.

13-15Hz is higher than 30Hz? :-) But yeah, a Mac is generally gonna
want a higher horizontal scan rate than a GS monitor can handle.
According to my AppleColor RGB owner's guide, the monitor's horz
scanning rate is 15.734kHz. Mac Technote HW 24 says that 512x384
requires a 24.48kHz horz rate, and 640x480 requires 35.0kHz.

However, apparently, the Mac Quadra's built in video is able to output
a video signal with NTSC scanning rates, 15.7kHz horizontal, 59.94Hz
vertical, which sounds like it'd work on a GS monitor. I bet the
picture you'd get would be interlaced though... not pretty :) Note
that I have _NOT_ tried this, and do not know if it will actually
work. Try at your own risk.

BTW, you say you have a 13" apple monitor... this _is_ a GS monitor,
right? :-) My AppleColor RGB monitor has a 12" screen, and Apple does
make (used to make?) a Mac monitor called the 13" Apple RGB.
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