TANDY/RADIO SHACK

2500 RSX (2500-1620/1621)

Processor                  80386SX
Processor Speed            25MHz
Chip Set                   Unidentified
Video Chip Set             Accumos
Maximum Onboard Memory     9MB
Maximum Video Memory       512KB
Cache                      None
BIOS                       Unidentified
Dimensions                 220mm x 220mm
I/O Options                Floppy drive interface, IDE interface, parallel
                           port, PS/2 mouse port, serial port, VGA port,
                           riser slot
NPU Options                80387SX

[Image]

                                CONNECTIONS

  Purpose                  Location   Purpose                    Location

  VGA port                   CN1      Volume control               CN5

  PS/2 mouse port            CN2      IDE interface                CN6

  Parallel port              CN3      Floppy drive interface       CN7

  Serial port                CN4      Riser slot                   SL1

                        USER CONFIGURABLE SETTINGS

                Function                     Label           Position

  »   Factory configured - do not alter        E1              Open

  »   On board video enabled                   J1           Pins 1 & 2
                                                              closed

      On board video disabled                  J1           Pins 2 & 3
                                                              closed

                            DRAM CONFIGURATION

          Size                   Bank 0/1                  Bank 2

           1MB                     1MB                      None

           3MB                     1MB                   (2) 1M x 9

           9MB                     1MB                   (2) 4M x 9

  Note: Bank 0/1 is factory installed and is not configurable. The
  location is unidentified.

                        VIDEO MEMORY CONFIGURATION

          Size                    Bank 0                   Bank 1

          256KB                   256KB                     None

          512KB                   256KB                    256KB

  Note: The location of banks 0 & 1 are unidentified. The size of the
  video memory chips are unidentified.

                           HARD DRIVE SELECTION

          Setting                     C/D                  C/D+DSP

     1 drive installed              Closed                   N/A

     2 drives installed               N/A                  Closed
         (primary)

     2 drives installed               N/A                   Open
        (secondary)