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- "Monitor sense pins.note"
- From Compuserve, May, 1992.
-
- The sensing of monitor type is through pins 4, 7, and 10. The sensing pins should be
- grounded or left unconnected. You can ground a pin by connecting it to Pin 11.
-
- Display Pixels Hz Pins grounded
- Apple Hi Res Monochrome 480 x 640 67 Hz 4
- Apple Hi Res RGB 480 x 640 67 Hz 4
- Apple 12" RGB 512 x 384 67 Hz 4, 10
- Apple 15" Portrait 640 x 870 75 Hz 7, 10
- Apple 2-Page Monochrome 1152 x 870 75 Hz 10
- VGA 480 x 640 10
- RS-170A (interlaced) 480 x 640 60 Hz 4, 7
-
- Sources:
- Apple Macintosh Technical Note 144: Macintosh Color Monitor Connections.
- Apple Macintosh Developer Notes: Macintosh Display Card 8•24 GC.
-
-
- Message: #27362, S/2 Mac Tech Questions
- Date: Tue, May 12, 1992 8:21:16 PM
- Subject: LC technical question
- From: Kevin Norris [AsstSysop] 75410,1674
- To: Ken Settle 76556,753 (received)
- Reply: #27441 (1 reply)
-
- Mac LC video connector pinouts:
-
- Pin Number Signal Name Signal Description
- 1 RED.GND Red ground
- 2 RED.VID
- Red video signal
- 3,15 /CSYNC or /HSYNC Composite synchronization signal if
- Apple monitor. Horizontal
- synchronization signal if VGA
- monitor.
- 4 SENSE0 Monitor sense signal 0
- 5 GRN.VID Green video signal
- 6 GRN.GND Green ground
- 7 SENSE1 Monitor sense signal 1 (grounded
- internally)
- 8 n.c. Not connected
- 9 BLU.VID Blue video signal
- 10 SENSE2 Monitor sense signal 2
- 11 C&VSYNC.GND Ground for CSYNC and VSYNC
- 12 /VSYNC Vertical synchronization signal
- 13 BLU.GND Blue ground
- 14 HSYNC.GND HSYNC ground
- Shell CHASSIS.GND Chassis ground
-
- A "/" at the beginning of a signal name indicates that the signal is active low.
-
- The Macintosh LC does not supply vertical synchronization with the Green video signal
- (pin~5). The vertical synchronization signal is supplied on pin 12.
-
- The Macintosh LC requires that pin 4 (SENSE0) be connected to Ground to signal the
- connection of a 640 x 480 monitor. The Macintosh LC requires that pin 4 and 10
- (SENSE0 and SENSE2) be connected to Ground to signal the connection of a 512 x 384
- monitor (i.e., the Macintosh 12" RGB Display). The Macintosh LC requires that pin 10
- (SENSE2) be connected to Ground to signal the connection of a VGA monitor. Pin 7
- (SENSE1) is grounded in the Macintosh LC.
-