AST RESEARCH, INC.

MEGAPLUS (REV. 6)

Card Type               Multi-I/O card
Chip Set                Unidentified
Maximum Onboard Memory  512KB DRAM (with MegaPak option)
I/O Options             Parallel port, serial ports (2)
Data Bus                8-bit ISA
Floppy drives supported None

[Image]

                                CONNECTIONS

          Function             Label           Function             Label

  Serial port 1                 J1     DCE connector                 J4

  Parallel port                 J2     Daughter board connector      J5

  DTE connector                 J3

                        USER CONFIGURABLE SETTINGS

                  Function                     Label         Position

  »   DTE pin select                            JP1         Pins 1 & 2
                                                              closed

      DCE pin select                            JP1         Pins 2 & 3
                                                              closed

      COM 1 enabled                             JP3         Pins 3 & 4
                                                              closed

      COM 2 enabled                             JP3         Pins 5 & 6
                                                              closed

                            DRAM CONFIGURATION

     Size          Bank 0         Bank 1        Bank 2         Bank 3

     64KB       (8) 64K x 1        None          None           None

     128KB      (8) 64K x 1    (8) 64K x 1       None           None

     192KB      (8) 64K x 1    (8) 64K x 1    (8) 64K x 1       None

     256KB      (8) 64K x 1    (8) 64K x 1    (8) 64K x 1    (8) 64K x 1

                            INTERRUPT CONFIGURATION

  IRQ     JP4/A   JP4/B    JP4/C    JP4/D    JP4/E    JP4/F    JP4/G    JP4/H

  IRQ2S   Closed   Open     Open     Open     Open    Open     Open     Open

  IRQ2C   Open    Closed    Open     Open     Open    Open     Open     Open

  IRQ3S   Open     Open    Closed    Open     Open    Open     Open     Open

  IRQ3    Open     Open     Open    Closed    Open    Open     Open     Open

  IRQ4    Open     Open     Open     Open    Closed   Open     Open     Open

  IRQ4C   Open     Open     Open     Open     Open    Closed   Open     Open

  IRQ5C   Open     Open     Open     Open     Open    Open     Closed   Open

  IRQ5S   Open     Open     Open     Open     Open    Open     Open     Closed

             MISCELLANEOUS TECHNICAL NOTES

            Note: The purpose of JP2 is unidentified.