If handy with low wattage soldering station or know of someone who has
same you can convert a cheap PC VGA/SVGA 13/14" monitor to work with
your Mac. I've done thirteen rewirings so far to go with give-away
LC-475/Q-605 and Q-650 Macs.
The following specifications show the VGA characteristics supported by
the Macintosh LC class machine:
Screen/Video Parameter Timing
Dot clock = 25.175 MHz
Dot = 39.733 nsec
Full line = 31.778 usec
Line rate = 31.469 KHz
Full frame = 16.68 msec
Frame rate = 59.94 Hz
The wiring diagram to match a IBM-type VGA monitor to a Mac follows. To
signal the Mac that a VGA monitor is connected to the Mac requires that
you connect pins 7 and 10 together. The wiring of the LC always has ID
bit 2 low. Thus ID #3 will be grounded, too, and the signal for the VGA
monitor will be set.
Mac LC Video Connector Monitor
2 Red Video 1
1 Red Ground 6
9 Blue Video 3
13 Blue Ground 8
5 Green Video 2
6 Green Ground 7
15 Horizontal Sync 13
12 Vertical Sync 14
14 Sync Ground 10
10 VGA ID
7 VGA ID
I'm using a H-P 98789A hi-res RGB 17" monitor. With this or Apple 16"
monitor, [or smaller] 256 16-bit colors will be displayed if 512K of
VRAM is
installed; 32 thousands of 16-bit colors will be displayed if 1 MB of
VRAM is
installed.
Older Macintoshes and video cards do not have programmable display
drivers that allow resolution switching on the fly. A Multiscan monitor
connected to an older video card or Macintosh will simply display 640 x
480 resolution.
Apple CPUs and video cards that fall into this class are:
Video cards - 4�8, 8/24, and 8/24 GC
LC, LC II, LC III
Performa
Quadra 605
Powerbooks
Duo and Mini Dock
Macintosh II series
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