IBM CORPORATION

PS/2 MODEL 70 386/25

Processor               80386DX
Processor Speed         25MHz
Chip Set                IBM
Max. Onboard DRAM       8MB
Cache                   None
BIOS                    IBM
Dimensions              355mm x 304mm
I/O Options             Serial port, parallel port, pointing device
                        connector, proprietary hard/floppy drive
                        controller slot, proprietary 16-bit MCA video
                        adapter slot, VGA port
NPU Options             80387

[Image]

                                CONNECTIONS

  Purpose                   Location    Purpose                Location

  Battery/speaker              J1       Keyboard                  J5

  Serial port                  J2       Proprietary               J6
                                        hard/floppy drive
                                        controller

  Parallel port                J3       Proprietary 16-bit        J7
                                        MCA video adaptor

  Pointing device              J4       VGA port                  J8

                            DRAM CONFIGURATION

     Size         Bank 0         Bank 1         Bank 2         Bank 3

     1MB         (1) 256K x       NONE           NONE           NONE
                    36

     2MB         (1) 256K x    (1) 256K x        NONE           NONE
                    36             36

     2MB         (1) 512K x       NONE           NONE           NONE
                    36

     3MB         (1) 256K x    (1) 256K x     (1) 256K x        NONE
                    36             36             36

     4MB         (1) 256K x    (1) 256K x     (1) 256K x    (1) 256K x 36
                    36             36             36

     4MB         (1) 512K x    (1) 512K x        NONE           NONE
                    36             36

     5MB         (1) 256K x    (1) 512K x     (1) 512K x        NONE
                    36             36             36

     6MB         (1) 256K x    (1) 256K x     (1) 512K x    (1) 512K x 36
                    36             36             36

     6MB         (1) 512K x    (1) 512K x     (1) 512K x        NONE
                    36             36             36

     7MB         (1) 256K x    (1) 512K x     (1) 512K x    (1) 512K x 36
                    36             36             36

     8MB         (1) 512K x    (1) 512K x     (1) 512K x    (1) 512K x 36
                    36             36             36

  Notes:SIMMs are a proprietary IBM design, standard 36-bit SIMMs can not
  be used.

  Onboard memory does not need to be installed in order to use memory
  expansion cards.