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Apple II video Expansion pinout

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15 pin D-SUB male connector layout

15 pin D-SUB male connector
at the Apple computer, looking into cable-side connector



Pin Name Description
1TEXTVideo text signal from TMG; set to inverse of GR, except in double high-resolution mode.
214M14M master timing signal from the system oscillator.
3SYNC*Displays horizontal and vertical synchronization signal from IOU pin 39.
4SEGBDisplays vertical counter bit from IOU pin 4; in text mode, indicates second low-order vertical counter; in graphics mode, indicates low-resolution.
51VSOUNDOne-volt sound signal from pin 5 of the audio hybrid circuit (AUD).
6LDPS*Video shift-register load enable from pin 12 of TMG.
7WNDW*Active area display blanking; includes both horizontal and vertical blanking.
8+12VRegulated +12 volts DC; can drive 300mA.
9PRAS*RAM row-address strobe from TMG pin 19.
10GRGraphics mode enable from IOU pin 2.
11SEROUT*Serialized character generator output from pin 1 of the 74LS166 shift register.
12NTSCComposite NTSC video signal from VID hybrid chip.
13GNDGround reference and supply.
14VIDD7From 74LS374 video latch; causes half-dot shift high.
15CREFColor reference signal from TMG pin 3; 3.58 MHz.

Note:
The signals at the DB-15 on the Apple IIc are not the same as those at the DB-15 end of the Apple III, Apple IIGS, and Macintosh II. Do not attempt to plug a cable intended for one into the other.

Note:
Several of these signals, such as the 14 MHz, must be buffered within about 4 inches of the back panel connector--preferably inside a container directly connected to the back panel.


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Pinouts.ru > VGA, DVI, S-Video and other video connectors pinouts listing >  Pinout of Apple II video Expansion and layout of 15 pin D-SUB male connector
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Source(s) of this and additional information: Apple Tech Info Library 1419: Apple IIc, External Pinouts at Apple TIL homepage, from Hardware Book 0 reports
Last updated at Sat Jun 25 2005. Submit additions or corrections for this document. Is this document correct or incorrect? What is your opinion?
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