Pinouts

SCART

Pin number	EURO version	JP21 version
1	-	Audio Left
2	Audio Right	-
3	-	GND
4	GND	GND
5	GND	Audio Right
6	Audio Left	-
7	Video Blue	GND
8	-	GND
9	GND	Composite Video / Video Luma
10	-	-
11	Video Green	-
12	-	-
13	GND	GND
14	-	GND
15	Video Red / Chroma	Video Red / Chroma
16	Blank (RGB detect)	Blank (RGB detect)
17	GND	GND
18	GND	GND
19	-	Video Green
20	Composite Video / Luma	Video Blue
21	GND	GND

• '-' means 'not connected'
• Blank - when average voltage on this pin is higher than 0.3V Medusa switches to RGB mode

Digital Input (DB9 - Rev B only)

Pin number	MDA/Hercules mode	EGA mode	RGBI/CGA mode	digital RGB mode (Sinclair QL)	Apple IIC mode
1	GND	GND	GND	Pin 2 / GND	Pin 13 / GND
2	-	Red 0	-	-	Pin 2 / (14MHz - not used)
3	-	Red 1	Red	Pin 7 / Red	Pin 6 / LDPS
4	-	Green 1	Green	Pin 6 / Green	Pin 11 / SEROUT
5	-	Blue 1	Blue	Pin 8 / Blue	Pin 10 / GR
6	Luma 1	Green 0	Intensity	-	Pin 14 / (VIDD7 - not used)
7	Luma 0	Blue 0	-	-	Pin 4 / (SEGB - not used)
8	HSYNC	HSYNC	HSYNC	Pin 4 / CSYNC	Pin 3 / CSYNC
9	VSYNC	VSYNC	VSYNC	-	-

• '-' means 'signal ignored in this mode'
• MDA/CGA/EGA and Commodore 128 - signals are in the same order as on computer output, so standard DB9 1:1 cable is enough to connect this machines to Medusa
• digital RGB mode - used mainly with Sinclair QL - you will need DIN8 to DB9 cable (pin numbers for DIN8 are given in the table)
• Apple IIC - to connect Apple IIC you need cable from DB15 to DB9 (pin numbers on DB15 are given in the table) - when you prepare cable for Apple IIC be aware that there is 12V on pin number 8 - DO NOT CONNECT THIS PIN !!! - it may destroy Medusa.

Analog Input (DB15 - VGA)

Pin number	Function
1	Red
2	Green
3	Blue
4	-
5	GND
6	GND
7	GND
8	GND
9	-
10	GND
11	-
12	-
13	HSYNC/CSYNC
14	VSYNC
15	-

• '-' means 'not connected'