der Mouse uttered:

> I have a SS20 with a cg14 (the SX).
>
> I was poking at it today, and I found that, mirabilu dictu, it (a)
> supports 1280x1024, (b) support 1600x1280, (c) supports 1920x1080 (!),
> and (d) the monitor I have at hand supports all of these (!! - though
> 1920x1080 is displayed with a rather squashed aspect ratio).
>
> Then I discovered that what I have is a 4M VSIMM, so I can't actually
> use any of those, except in 8bpp. :-(  (Well, I can run in 24bpp, but
> it acts as though it just ignores the high bit of the video memory
> address - early video memory is displayed twice on the screen, and
> accessing it from the host at high addresses actually wraps, accessing
> lower memory.  Not very useful.)
>
> I have two questions:
>
> (1) When looking at the resolutions, I note that some of them have an
> "m" appended (eg, r1600x1280x76m).  Insofar as I can tell from testing
> (which has been rather minimal), this m does not actually change
> anything.  So, my question is, what does it mean?


Looks like it changes (lowers) the oscillator frequency. Higher oscillator 
frequencies would probably produce a better picture.

I deduced this guess from:
http://www.chiark.greenend.org.uk/~pmaydell/misc/cgsixdata.txt

Christian

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