Caple C871i Manual do Utilizador descarregar pdf (Página 434)

Apple II Computer Info

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Article 152731 of comp.sys.apple2:

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From: [email protected] (Scott Alfter)

Newsgroups: comp.sys.apple2

Subject: VGA monitors and the IIGS

Date: 18 Sep 1999 19:11:13 GMT

Organization: USS Voyager NCC-74656, Delta Quadrant

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For a few months now, I've had an NEC MultiSync 3D hooked into my IIGS.

It's one of the few VGA monitors capable of syncing to the relatively low

15.75-kHz scan rate used by the GS. Mine seems to exhibit strange behavior

when you first switch it on, though...the picture starts out tall, then

disappears, then comes back in the proper size. This takes about 5 minutes

from when you first switch it on if it hasn't been used in a while. I

haven't observed this behavior when the monitor is cold-started and fed a

VGA signal from one of my x86 boxen.

I'll soon be at a point where I'd like to take this monitor and throw it in

a closet with some servers, which means I'll be without a color display for

the GS (my only other monitor for it is a Monitor II green-screen that came

with it in 1985...the computer was originally a IIe, but was upgraded in

1992).

I know the Second Sight exists, but software support for its extra features

is almost non-existent and it's said to have trouble with some special modes

(either 3200-color mode or fill mode; can't remember which).

It seems that scan doublers are in common use among Amiga users, though. A

search of "scan doubler" on AltaVista turned up several Amiga hardware

vendors selling scan doublers at reasonable prices. As the name indicates,

a scan doubler takes one line of video in at 15.75 kHz and outputs it twice

at 31.5 kHz, which corresponds to the standard 640x480 60-Hz VGA mode.

Doesn't the Amiga spit out the same kind of RGB video as the IIGS? If it

does, then it seems that this would be a more affordable (and better) way to

hook any random VGA monitor to a IIGS. Has anybody tried using one of these

with a IIGS, and if so, how well did they work? (I'm guessing that a

special cable might need to be made to hook the scan doubler into a IIGS;

those of you who are using Commodore monitors might know something about

this.)

Apple II Computer Technical Information : Apple II Family Hardware Info

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