
TEXAS MICROSYSTEMS, INC.

P575/90

Processor                   Pentium
Processor Speed             90/100MHz
Chip Set                    Intel
Video Chip Set              None
Maximum Onboard Memory      128MB
Maximum Video Memory        None
Cache                       256/512KB
BIOS                        Phoenix
Dimensions                  337mm x 122mm
I/O Options                 Floppy drive interface, IDE interface, SCSI
                            interface, parallel port, serial ports (2)
NPU Options                 None

[Image]

                                CONNECTIONS

  Purpose                  Location    Purpose                  Location

  SCSI interface             CN1       Serial port 1              CN6

  IDE interface              CN2       Parallel port              CN7

  Floppy drive               CN3       AT keyboard connector      CN8
  interface

  Optional keyboard          CN4       Hard drive LED             JP15
  connector

  Serial port 2              CN5

                        USER CONFIGURABLE SETTINGS

               Function                    Label           Position

     Cache type select write back          JP1              Open

      Cache type select write               JP1             Closed
      through

     Pipeline mode enabled                 JP2             Closed

      Pipeline mode disabled                JP2              Open

     Watchdog timer enabled                JP4        Pins 1 & 2 closed

      Watchdog timer disabled               JP4        Pins 2 & 3 closed

     Factory configured - do not           JP5        Pins 2 & 3 closed
      alter

     Factory configured - do not           JP6        Pins 2 & 3 closed
      alter

     Factory configured - do not           JP7        Pins 2 & 3 closed
      alter

     Factory configured - do not           JP8        Pins 2 & 3 closed
      alter

     Cache type select burst              JP10        Pins 2 & 3 closed

      Cache type select standard           JP10        Pins 1 & 2 closed

     SCSI speed select 40MHz              JP13        Pins 1 & 2 closed

      SCSI speed select 33MHz              JP13        Pins 2 & 3 closed

     PS/2 IRQ 12 enabled                  JP14        Pins 2 & 3 closed

      Next Step OS used                    JP14        Pins 1 & 2 closed

     Monitor type select color            SW1/1              On

      Monitor type select monochrome       SW1/1              Off

     Flash BIOS enabled                   SW1/2              Off

      Flash BIOS disabled                  SW1/2              On

     CMOS memory normal operation         SW1/3              Off

      CMOS memory clear                    SW1/3              On

     Factory configured - do not          SW1/4         Unidentified
      alter

             DRAM CONFIGURATION

     Size          Bank 0        Bank 1

      8MB        (2) 1M x 36      None

     16MB        (2) 2M x 36      None

     16MB        (2) 1M x 36   (2) 1M x 36

     24MB        (2) 2M x 36   (2) 1M x 36

     32MB        (2) 4M x 36      None

     32MB        (2) 2M x 36   (2) 2M x 36

     40MB        (2) 4M x 36   (2) 1M x 36

     48MB        (2) 4M x 36   (2) 2M x 36

     64MB        (2) 8M x 36      None

     64MB        (2) 4M x 36   (2) 4M x 36

     72MB        (2) 8M x 36   (2) 1M x 36

     96MB        (2) 8M x 36   (2) 4M x 36

     128MB       (2) 8M x 36   (2) 8M x 36

                 CACHE CONFIGURATION

  Note: The location of the cache is unidentified.

                        CACHE JUMPER CONFIGURATION

      Size               JP9               JP11               JP12

      None               N/A            Pins 1 & 2      Pins 1 & 2 closed
                                          closed

      256KB           Pins 1 & 2        Pins 2 & 3      Pins 1 & 2 closed
                       closed             closed

      512KB           Pins 2 & 3        Pins 2 & 3      Pins 2 & 3 closed
                       closed             closed

  CPU SPEED SELECTION

   Speed        JP3

    1/2        Closed

    2/3         Open

