MBF COMPANY CONFIDENTIAL FIELD INFORMATION BULLETIN

SERVICE GROUP(S): MICRO                MFG: PERSYST

 NACS  TYPE(S): N073                   MFG. MODEL(S): MULTI-FUNCTION

CATEGORY: PC ADD-IN BOARDS             DESC: MEMORY

                   *** TABLE OF CONTENTS AS OF 12/20/90 ***
FIB 00001.RAMPAK PROGRAMMABLE LOGIC ARRAY.............................07/28/87


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                    *** RAMPAK PROGRAMMABLE LOGIC ARRAY ***                  

         TECH TALKS                                         PERSYST
         MICRO PRODUCTS                                      RAMPAK


         The  PERSYST  TIME  SPECTRUM Module with  RAMPAK  requires  a
         specific  memory  addressing PLA (programmable  logic  array)
         based on the PC module and memory capacity of the system.

         If  your  PERSYST RAMPAK was attached to your  TIME  SPECTRUM
         board  at  the factory,  a special PLA for the IBM PC  or  XT
         (256KB  motherboard)  was  installed on  the  Time  SPECTRUM.
         (That PLA has  a brown dot and green dot on it).  If that PLA
         is  incorrect  for your system according to the table  below,
         insert the PLA (two green dots, shipped in your TIME SPECTRUM
         package)   in   your  TIME  SPECTRUM   board   according   to
         instructions given in the RAMPAK INSTULLATION GUIDE,  Section
         5.1.

         If  your RAMPAK is not attached to a TIME SPECTRUM board when
         you receive it,  two PLAs are attached to RAMPAK.  Select the
         correct  PLA from the table below based on your model of  IBM       
         PC  and install the PLA following the instructions  given  in
         the RAMPAK INSTALLATION GUIDE, Section 5.1.

         -------------------------------------------------------------------
                     16-641C        ORIGINAL                  PC XT      PC X
                     ORIGINAL       PC with      64-256K      with       with
                       PC           Exp Box      New PC       128KB      256KB
         --------------------------------------------------------------------
          Max Memory   544KB         640KB        640KB        640KB     640KB
          Supported

          System        64KB          64KB        256KB        128KB     256KB
          Board Mem

          Max
          Additional   484KB         576KB        384KB        512KB     384KB
          Memory

         PLA to
         Use           Green/        Green/       Brown/       Green/  *Brown/ .
         (Dot Colors)  Green         Green        Green        Green    Green

         * PLA used on TIME SPECTRUM/RAMPAK (assembled) shipped from factory.

ORIGINATOR: J. HILL


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