MBF COMPANY CONFIDENTIAL FIELD INFORMATION BULLETIN

SERVICE GROUP(S): MICRO                MFG: PERSYST

 NACS  TYPE(S): N027                   MFG. MODEL(S): COMBO

CATEGORY: PC ADD-IN BOARDS             DESC: MONOCHROME

                   *** TABLE OF CONTENTS AS OF 12/20/90 ***
FIB 00001.INSTALLATION AND TECHNICAL REFERENCE........................11/17/87


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               *** INSTALLATION AND TECHNICAL REFERENCE ***

                                 PC000545

DESCRIPTION:
  The Persyst  MONO COMBO card is a multifunction monochrome graphics
  adapter that can be installed in a newer style IBM PC or IBM XT,AT or
  compatible computer. The following features are provided:
    Serial RS-232 port
    IBM-compatible monochrome adapter
    Parallel port
    Clock/calendar (Optional)
    Up to 384KB of system memory

CONNECTORS:
  J1    Monochrome display adapter
  J2    Parallel port connector
  J3    Lightpen connector
  J4    Cliffhanger connector for serial port

JUMPERS AND SWITCHES
  4 Position switch for Memory address
                pos1 pos2 pos3 pos4
  128KB         on   on                 Starting Address
  256KB         on   off
  384KB         off  on
  512KB         off  off
  64KB-128KB              on   on       memory on mono-combo
  192KB                   off  on
  256KB                   off  off                                           
  320KB-384KB             on   off

  JUMPERS
  E1-E2         Sets the serial ort input for RS-232-C levels
  E2-E3
  E4-E5         Enables Memory parity
  E6-E7         Sets calendar/clock address range to 350H-35FH
  E7-E8         Sets calendar/clock address range to
  E9-E10        Disables clock
  E10-E11       Enables clock
  E12-E13       Sets serial port address to 3F8H (COM1)
  E13-E14       Sets serial port address to 2F8H (COM2)
  E15-E16       Sets serial port address to 2F8H (COM2)
  E16-E17       Sets serial port address to 3F8H (COM1)
  E19-E20       Implements standard character set ROM
  E22-E23       Internal use - must be installed
  E24-E25       Selects first character set of standard ROM
  E28-E29       Implements standard character set ROM
  E30-E31       Sets parallel port address to 3BCH (LPT1)
  E31-E32
  E33-E34       Sets parallel port address to eBCH (LPT1)
  E34-E35
  E36-E37       Implements Centronics interface on parallel port
  E39-E40       Implements internal direction control on parallel port
  E42-E43       Implements unidirectional output on parallel port
  E45-E46
  E46-E47       Sets serial port for interrupt level IRQ4
  E52-E53       Disables zero wait state (PC-AT only)

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  E55-E56       Sets parallel port for interrupt IRQ7
  E58-E59       Ring indicator connected on serial port                      


ORIGINATOR: JOHN HILL


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