PS PORT                                         ASSY PA1010414-xx
      
SWITCH SETTINGS
ЪДВДВДВДВДВДї 
і1і2і3і4і5і6і     SW1: 1 = ON, 0 = OFF
АВБВБВБВБВБВЩ 
 і і і і АДБДДДД  Parallel Port Address
 і і і і 0 1      LPT1 - 3BCH: Used only if no Monochrome/Printer Adapter
 і і і і 1 0      LPT2 - 378H: Is LPT2 if Monochrome/Printer is present
 і і і і 1 1      LPT3 - 278H
 і і і і 0 0      Disabled
 і і і і
 і і АДБДДДД  Second Serial Port Address
 і і 0 1      COM1 - 3F8H & Jumper E11-E13 for IRQ4  
 і і 1 0      COM2 - 2F8H & Jumper E13-E15 for IRQ3*  
 і і 1 1      COM3 - 3E8H 
 і і 0 0      Second Serial Port Disabled
 і і 
 АДБДДД  First Serial Port Address
 0 1     COM1 - 3F8H & Jumper E39-E41 for IRQ4*
 1 0     COM2 - 2F8H & Jumper E41-E43 for IRQ3
 1 1     COM3 - 3E8H
 0 0     First Serial Port Disabled     

JUMPER SETTINGS

Device            Description                   Configuration

Parallel Port     Interrupt Level IRQ7          E35-E37*  *Factory settings
                  Interrupt Level IRQ5          E37-E38
Parallel Port     Unidirectional Port Control   E8-E10*
                  Bidirectional Port Control    E7-E8
                  Bidirectional/Internal Ctrl   E4-E6*
                  Bidirectional/External Ctrl   E5-E6
Parallel Port     Centronics Interface          E1-E3*
                  Dataproducts Interface        E1-E2
Serial Port 1     RS-232 Interface              E25-E26*
                  TTL Interface                 E26-E28
                  Ring Indicator connected      E29-E30*
                  +5V on pin 9                  E27-E29
Serial Port 2     RS-232 Interface              E20-E22*
                  TTL Interface                 E18-E20
                  Ring Indicator connected      E21-E23*
                  +5V omn pin 9                 E19-E21
Slot Selection    PC-XT short slot              E31-E32
                  Other installations           E31-E33*

ADDING 2ND SERIAL PORT TO THE PS PORT

Add National Semiconductor or equivalent NS16450 (U2), SN75154N (U1), and MC1488N
(U5). Configure the port accordingly.

EXTERNAL EQUIPMENT CONNECTIONS

J1                DB25 Female Parallel Printer Port Connector
J2                DB9 Male Serial Port 1 Connector
J3                10-Pin Berg header for optional Serial Port 2 cliffhanger cable

10-Pin BERG HEADER PINOUTS                DB9 MALE CONNECTOR PINOUTS

1     CD          6     CTS               1     CD          6     DSR
2     DSR         7     DTR               2     RXD         7     RTS
3     RXD         8     RI                3     TXD         8     CTS
4     RTS         9     SGRND             4     DTR         9     RI
5     TXD                                 5     SGRND
