Graphic Adapters

Monochrome Adapter 9pin D-Sub

Pin	Signal
1	GND
2	GND
3	N.C.
4	N.C.
5	N.C.
6	+INTENSITY
7	+VIDEO
8	+HORIZ SYNC
9	-VERT SYNC

CGA (Color Graphics Adapter) Connector 9pin D-Sub

Pin	Signal
1	GND
2	GND
3	RED
4	GREEN
5	BLUE
6	INTENSITY
7	not used
8	HORIZ SYNC
9	VERT SYNC

EGA (ENHANCED GRAPHICS ADAPTER) Video Connector (9pin D-Sub)

Pin	Signal
1	GND
2	SECONDARY RED
3	RED
4	GREEN
5	BLUE
6	SECONDARY GREEN/INTENSITY
7	SECONDARY BLUE/MONO VIDEO
8	HORIZ RETRACE
9	VERT RETRACE

VGA (Virtual Graphic Array) Connector

Stecker: 15-Pin High Density D-Sub female conector (socket). The cable has a male connector (plug).

Pin	Signal
1	Red Video¹
2	Green Video¹
3	Blue Video¹
4	Monitor ID Bit2 (not used)
5	GND
6	Red Return (GND)
7	Green Return (GND)
8	Blue Return (GND)
9	Key (no pin in the plug!)
10	Sync Return (GND)
11	Monitor ID Bit0(not used)
12	Monitor ID Bit1 ²
13	Horizontal Sync
14	Vertical Sync
15	N.C.

¹ Analog monochrome monitors only use the green video input. Red and blue are not used.

² Monochrome monitors set pin 12 to ground (GND). Color monitors leave pin 12 unconnected. The graphic adapter uses this signal to detect the type of monitor which is connected.

9pin D-Sub to 15pin D-Sub Adapter

Older systems (monitors and graphic adapters) had 9pin D-Sub inputs and outputs. With this adapter they can be adapted to the newer high density 15pin D-Sub connector.

9pin D-Sub Signal	Pin	15pin D-Sub Signal	Pin
Red	1	Red	1
Green	2	Green	2
Blue	3	Blue	3
Horz. Sync	4	Horz. Sync	13
Vert. Sync	5	Vert. Sync	14
Red GND	6	Return Red	6
Green GND	7	Return Green	7
Blue GND	8	Return Blue	8
Sync GND	9	Digital Ground	10
		Ground	5

Analog video signals have the following voltage levels:

Dark = 0V
Full color intensity = +0.7V

MIDI Inputs and Outputs (5pin)

MIDI Input Pin	Signal	MIDI Output Pin	Signal
1	N/C	1	N/C
2	N/C	2	GND
3	N/C	3	N/C
4	Current Src	4	Current Sink
5	Current Sink	5	Current Src

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