Macintosh Video to VGA adapter pinout

video cable wiring

15 pin highdensity D-SUB female connector layout

15 pin highdensity D-SUB female connector
to the monitor cable

* 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):

Display	Sense Pins			Horiz & Vert	Band Width	Vert Refrsh	Horiz Refrsh
	10	7	4	Pixels	(MHz)	(Hz)	(KHz)
Apple 21" Color	0	0	0	1152 x 870	100	75	68.7
Apple Portrait	0	0	1	640 x 870	57.2832	75	68.9
12" AppleColor RGB	0	1	0	512 x 384	15.6672	60.15	24.48
Apple 2-page Mono.	0	1	1	1152 x 870	100	75	68.7
NTSC (To produce a color NTSC signal, an RGB-to-NTSC converter is required.)	1	0	0	underscan-512 x 384	12.2727	59.94	15.7
	1	0	0	overscan-640 x 480	12.2727	59.94	15.7
13" Apple Hi-Res Mono	1	1	0	640 x 480	30.24	66.7	35.0
13" AppleColor Hi-Res RGB	1	1	0	640 x 480	30.24	66.7	35.0
Apple 16" Color Disp.				832 x 624	57.63	75	75
Portrait Color, such as Radius	1	0	1	640 x 870	57.2832	75	68.9
EXTENDED SENSE CODES (enabled by not grounding any sense pins)
	Sense Pins
	4-10	10-7	7-4
16" color, such as E-Machines	0	1	1	832 x 624	57.2832	75	49,7
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 1	0	0	0	underscan- 640 x 480	14.75	50	15.625
				overscan- 768 x 576	14.75	50	15.625
PAL option 2	1	1*	0	underscan-640 x 480	14.75	50	15.625
				overscan- 768 x 576	14.75	50	15.625
(*Note: This PAL option also requires a diode between pins 10 and 7, with the cathode on 10)
VGA	1	0	1	640 x 480	25.175	59.95	31.47
Super VGA	1	0	1	800 x 600	36	56	35.16
(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" color	1	1	0	1024 x 768	80	75	60.24
No external monitor (video halted)	1	1	1

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 connector
to the mac computer

Pinouts.ru > S-Video, SCART and other video/audio cables pinouts and schemes listing > Pinout of Macintosh Video to VGA adapter and layout of 15 pin highdensity D-SUB female connector and 15 pin D-SUB male connector	Document status:	correct
Source(s) of this and additional information: saragossa.net	2 reports
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