🚀 go-pugleaf

In article <fXQx2bD@quack.sac.ca.us> mrapple@quack.sac.ca.us (Nick Sayer) writes:
>I have an NEC 5FG. It is a multisync RGB monitor. I also have the CPU
>boards for an arcade video game. It has NTSC timed analog RGB output.
>I want to know if the two will be compatable. I suspect they will, but
>I am confused:
>
>It's my understanding that the vertical retrace rate of NTSC is 60 Hz,
>and that it is interlaced, yielding 30 pictures per second. But the
>monitor says 55-90 Hz vertical sync rate. That sounds compatable
>to me.

Yes that's fine.

>It's my understanding that the horizontal retrace rate of NTSC is
>14 kHz.

It's 15.734 KHz.

>The monitor says that its acceptable range is 27-79 kHz.
>Now 14 x 2 is 28, but am I reading too much into that coincidence?

Yup.  It's not going to work.  There is something to the coincidence though:
640x480 VGA is what NTSC would be like if it didn't have interlace.  I.E.,
same verticle rate, double horizontal rate.

Now if you had an analog CGA compatible monitor, you could do it.
-- 
/*  jhallen@world.std.com (192.74.137.5) */               /* Joseph H. Allen */
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]?a[p+=a[p+=q]=q]=q:0:0;for(;q++-1817;)printf(q%79?"%c":"%c\n"," #"[!a[q-1]]);}