There is a product called the Electrohome RGB 2000H which is used to
project the video display of the Macintosh II. The card used in this
configuration is the Macintosh II Video Card with full memory (512K of
video RAM) for the 8 bit color mode. Two cables are needed: the 15 pin
video cable that comes with a Macintosh II color monitor, and the 10 pin
cable that comes with the Electrohome projector. An interface is
neccessary to convert the signals from the Video Card with Macintosh II
RGB monitor cable to that of the Electrohome and its cable. Such an
interface is provided by Covid, Inc.
To locate a vendor's address and phone numbers, use the vendor name as a
search string.
Here are their pinouts of Macintosh II monitor and Video Card for reference:
Macintosh II Video Card
Pin# Signal
--- ------
1 GND
2 Red Channel
3 Composite Sync
4 GND
5 Green Channel (also recognized as Monochrome Signal)
6 GND
7 NC
8 NC
9 Blue Channel
10 NC
11 GND
12 Green Channnel
13 GND
14 GND
15 NC
AppleColor Hi-Res RGB Monitor
Pin# Signal
--- ------
1 Red Video Return
2 Red Video
3 Composite TTL Sync
4 Composite Sync Return
5 Green Video
6 Green Video Return
7 NC
8 NC
9 Blue Video
10 NC
11 NC
12 NC
13 Blue Video Return
14 NC
15 NC
Shell Shield GND