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Macintosh Video to VGA adapter

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Use this adapter to connect a standard VGA (or higher) monitor to your Apple Macintosh.



* Connection as shown wil allow multiple resolutions up to 1152x870. Reverse diode to limit resolutions to 1024x768. The Mac Centris, Quadra, and later systems frame buffer determines what type of display is attached to the video connector by examining the state of 3 sense line pins.

The Mac Quadras, Centris series, and later models should support any display, whether from Apple or from another vendor, that meets one of the following specifications:


STANDARD SENSE CODES (1 or more of the sense pins grounded):

DisplaySense PinsHoriz & Vert
Band
Width
Vert
Refrsh
Horiz
Refrsh
 1074Pixels(MHz)(Hz)(KHz)
Apple 21" Color0001152 x 8701007568.7
Apple Portrait001640 x 87057.28327568.9
12" AppleColor RGB010512 x 38415.667260.1524.48
Apple 2-page Mono.0111152 x 8701007568.7
NTSC (To produce a color NTSC signal, an RGB-to-NTSC converter is required.)100underscan-512 x 38412.272759.9415.7
100overscan-640 x 48012.272759.9415.7
13" Apple Hi-Res Mono110640 x 48030.2466.735.0
13" AppleColor
Hi-Res RGB
110640 x 48030.2466.735.0
Apple 16" Color Disp. 832 x 62457.637575
Portrait Color,
such as Radius
101640 x 87057.28327568.9
EXTENDED SENSE CODES (enabled by not grounding any sense pins)
 Sense Pins 
4-1010-77-4
16" color, such as
E-Machines
011832 x 62457.28327549,7
PAL: PAL has two wiring options, using the extended sense pin configuration. To produce a color PAL signal, an RGB-to-PAL converter is required.
PAL option 1000underscan- 640 x 48014.755015.625
overscan- 768 x 57614.755015.625
PAL option 211*0underscan-640 x 48014.755015.625
overscan- 768 x 57614.755015.625
(*Note: This PAL option also requires a diode between pins 10 and 7, with the cathode on 10)
VGA101640 x 48025.17559.9531.47
Super VGA101800 x 600365635.16
(To enable Super VGA after configuring the sense pins and connecting the monitor for VGA, open the Monitors control panel and select Options. Choose Super VGA from the list and restart your system.)
19" color1101024 x 768807560.24
No external monitor
(video halted)
111

Notes:

1) Sense pins 4, 7, and 10 are referred to as MON.ID1, MON.ID2, and MON.ID3 in the Macintosh pinout table or SENSE0, SENSE1, and SENSE2 in pinout tables for the video connectors. A sense pin value of 0 means that pin should be grounded to the C&VSYNC.GND signal (pin 11); a value of 1 means do not connect the pin.

2) Extended sense codes will be examined if the following sense code is detected: 1 1 1 (no sense pins grounded).

 

NOTE for extended sense codes: Sense pin pair value of 0 means those pins should be tied together (as opposed to grounding 10, 7, or 4 to pin 11); value of 1 means leave open. DON"T wire any of these pins to ground.


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15 pin D-SUB male

15 pin D-SUB male connector
to the mac computer

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