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Display Cards 4•8 & 8•24.note
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1994-06-21
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Note from Apple.
Macintosh Display Cards 4•8 & 8•24 and third-party monitors
What do I need to determine if my third-party monitor is compatible with an
Apple video display card?
___
The Macintosh® Display Cards 4•8 & 8•24 support any monitor that meets one of
the following specifications:
- - - - - - MHz - - - - -
Sense pins Hor x Vert Dot Vert Horiz
10 7 4 Display Pixels Clock Refrsh Refrsh
---------- ---------------------- ---------- ------- ------ ------
0 0 0 21-inch Color Monitor 1152 x 870 100 75 68.7
0 0 1 Apple Portrait Display 640 x 870 57.2832 75 68.9
0 1 1 Apple Two-Page Monitor 1152 x 870 100 75 68.7
1 1 0 12” Apple
Monochrome Monitor 640 x 480 30.24 66.7 35.0
1 1 0 13” AppleColor
RGB Monitor 640 x 480 30.24 66.7 35.0
0 - Grounded 1 - Not Connected
Note that sense pins 4, 7, and 10 are referred to as SENSE0, SENSE1, and
SENSE2 in video connector pinout tables, such as the table in “Macintosh
Display Cards 4•8 and 8•24 Developer Note.
Here are the pinouts for the Macintosh Display Cards:
Pin Description
--- -----------
1 Red Video Ground
2 Red Video
3 Composite Sync
4 SENSE0
5 Green Video
6 Green Video Ground
7 SENSE1
8 Not Connected
9 Blue Video
10 SENSE2
11 Composite Sync and Vertical Sync Ground
12 Vertical Sync
13 Blue Video Ground
14 Horizontal Sync Ground
15 Horizontal Sync
Shell Chassis Ground
©Apple Computer, Inc. 1985-1991