Macintosh Portrait Display & modern macs?

[Lars Petrus]

I have an old Portrait Display from 1989. It works fine with my
trusted old si. But when I try to plug it in to my Performa 6300,
it is just black.

Is this old screen incompatible with newer macs, or is there some
adapter or something I could get to make this work?

- - - -
"A nuclear power plant is infinitely safer than eating,
because 300 people choke to death on food every year."
--- Dixy Lee Ray

Lars Petrus, Sunnyvale, California - la...@netgate.net
http://u1.netgate.net/~mette/lars/

[Matthew Pritzker]

Lars Petrus wrote:
>
> I have an old Portrait Display from 1989. It works fine with my
> trusted old si. But when I try to plug it in to my Performa 6300,
> it is just black.
>
> Is this old screen incompatible with newer macs, or is there some
> adapter or something I could get to make this work?

According to AppleSpec database, and DevNotes, too, 6300 doesn't support
640x870, only 512x384, 640x480 and 832x624.

--
--------------------
Matthew Pritzker Graduate Research Assistant
mpri...@iucf.indiana.edu IU Physics Dept.

[Lars Petrus]

Matthew Pritzker wrote:

> In article <lars-31039...@pm3-63.netgate.net>, la...@netgate.net
(Lars Petrus) wrote:

> > I have an old Portrait Display from 1989. It works fine with my
> > trusted old si. But when I try to plug it in to my Performa 6300,
> > it is just black.
> >
> > Is this old screen incompatible with newer macs, or is there some
> > adapter or something I could get to make this work?
>
>
> According to AppleSpec database, and DevNotes, too, 6300 doesn't support
> 640x870, only 512x384, 640x480 and 832x624.

Yes, that explains it. I plugged it into a smurf G3, and it worked perfectly.
I could even play a decent game of StarCraft in those 16 greytones.

It just never uccured tome that a 1996 computer could "have too few pixels"
to drive a 1989 screen.