Connections

All connectors are shown as seen looking into the board.

PL1 STEbus connector

PL2. 36-way test connector

35 o o o o o o o o o o o o o o o o o o 1
36 o o o o o o o o o o o o o o o o o o 2
 1 +12V		 2 -12V
 3 GND		 4 +5V
 5 RESET	 6 MCLK
 7 MA2		 8 GND
 9 MA1		10 Reserved
11 MA0		12 MINTR1
13 !IOWRT	14 MINTR0
15 !IORD	16 !MWAIT
17 !IPST	18 +5V
19 MD7		20 !MCS1
21 MD6		22 !MCS0
23 MD5		24 Reserved
25 MD4		26 TDMA
27 MD3		28 !MCS2
29 MD2		30 MA3
31 MD1		32 !MDACK
33 MD0		34 !MDRQT
35 GND		36 +5V

PL3. Monochrome video connector

  Core: Composite video
Shield: Ground

PL4. 9-way D-type RGB connector

The exact function of the PL4 pins are defined by jumpers on the link areas. See ’Section 3. Links and Options’.

			o 5 BLUE
Vsync		9 o
			o 4 GREEN
Hsync/Csync	8 o
			o 3 RED
Csync		7 o
			o 2 GND
Intensity	6 o
			o 1 GND

PL5. 20-way video output edge connector

OPT	 1 o o  2 VSYNC
DISP1	 3 o o  4 DISP2
EXSYNC	 5 o o  6 G(ana)
R(ana)	 7 o o  8 CSYNC 
B(ana)	 9 o o 10 HSYNC 
Gnd	11 o o 12  EXCLK 
Gnd	13 o o 14 LPSTB
+5V	15 o o 16 +5V
R(TTL)	17 o o 18 G(TTL)
B(TTL)	19 o o 20 I(TTL)