Re: Apple ][ and Mac question

["Warren Ernst" <wernst@gmail.com>]

Not so fast!

There are a few (very old) models of VGA monitor that can sync down to
the IIGS's 15.7Khz. If you can locate such a VGA monitor, then one of
those Mac-to-VGA port adapters *should work.*

The CSA2 FAQ has the follow to say on the subject:
----------------snip---------------
015- Which monitors and adapters can I use to replace my IIgs monitor?

     You should keep an eye out for any analog RGB monitor that can
horizontally sync down to 15.75 kHz. These include:

     AppleColor RGB Monitor replacement (model A2M6014, the IIgs
monitor)
     Commodore 1084 models and equivalents like the Magnavox
Professional 80
     Sony CPD 1302 MultiSynch
     NEC MultiSync (original), MultiSync II, MultiSync 3D
     Commodore 1902 (although most of these only do digital RGB)
     Tandy CM-8 (not sure about model but it was used with the Coco3)
     Atari SC1224 (used with the ST series)
     Some TVs

     For example, I just tried a Sony CPD 1302 multisych monitor on a
GS and it works perfectly; and it has a .25 dot pixel! Very crisp
picture. I used a standard cable from a Mac II (or you could check with
Redmond Cable at http://www.redcab.com/ ).

     The NEC MultiSync II is another excellent monitor that will sync
down to 15 kHz. (The MultiSync IIA won't work, though.)  A cable you
can use is shown below:


NEC Multisync II Dsub-9     IIgs Dsub-15

1 Red                        2 Red
2 Green                      5 Green
3 Blue                       9 Blue
4 Horizontal Sync            3 Composite Sync
5 Vertical Sync (NC)*
6 Red GND                    1 Red GND
7 Green GND                  6 Green GND
8 Blue GND                  13 Blue GND
9 GND

*Note: DO NOT hook up Pin 5 (Vertical Sync); just chop it off. The NEC
Multisync II is capable of composite sync on its horizontal sync pin.


     The Atari SC1224 used with the ST is a ~15 kHz monitor. There were
several versions, one by Goldstar, which appeared in one of the two
case styles used by Atari over the years and bore the Atari logo. It
works fine with the IIgs, provided an adapter cable is created. Redmond
Cable can provide it.

     The Commodore Amiga 1084 monitors and Magnavox equivalents (e.g.
Professional 80, 8CM515) will work with the Apple IIgs. You will need a
special Dsub-9 to Dsub-15 cable:


1084 model with Dsub-9      IIgs Dsub-15
(Analog mode)

1 GND                       13 GND (Blue)
3 Red                        2 Red
4 Green                      5 Green
5 Blue                       9 Blue
7 Composite Sync             3 Composite Sync



1084 model with DIN-6       IIgs Dsub-15
Analog Connector

1 Green                      5 Green
2 Horizontal Sync            3 Composite Sync
3 GND                        1, 6, 13 GND's
4 Red                        2 Red
5 Blue                       9 Blue
6 Vertical Sync (NC)*

*Note: DO NOT hook up Pin 6 (Vertical Sync). Just chop it off.
---------------snip--------------

I see at least three VGA monitors mentioned there.

I have a HUGE collection of old VGA monitors -- some name brands and
some not -- and not one of them will sync up wtih a GS. Bummer.

-Warr