TMC RESEARCH CORPORATION

PAT48PM

Processor           80486SX/80487SX/80486DX/ODP486SX/80486DX2
Processor Speed     20/25/33/40(internal)/50/66(internal)MHz
Chip Set            OPTI
Max. Onboard DRAM   32MB
Cache               64/128/256KB
BIOS                AMI
Dimensions          330mm x 218mm
I/O Options         None
NPU Options         None

[Image]

                                CONNECTIONS

  Purpose              Location      Purpose                 Location

  Speaker            J1 pins 1 - 4   IDE LED in           J1 pins 10 & 20

  Turbo switch        J1 pins 7 &    Power LED &          J1 pins 11 - 15
                          17         keylock

  Turbo LED           J1 pins 8 &    IDE LED out                J2
                          18

  Reset switch        J1 pins 9 &    External battery           J4
                          19

                        USER CONFIGURABLE SETTINGS

                Function                      Jumper         Position

  »   CMOS memory normal operation             JP1           pins 2 & 3
      (internal battery)                                      closed

      CMOS memory normal operation             JP1             Open
      (external battery at J4)

      CMOS memory clear                        JP1           pins 1 & 2
                                                              closed

  »   Bus speed select CLKIN/4                 JP2             Open

      Bus speed select CLKIN/6                 JP2            Closed

  »   Monitor type select color                JP3            Closed

      Monitor type select monochrome           JP3             Open

  »   CPU speed (CLKIN) select iOSC/1          JP4           pins 1 & 2
                                                              closed

      CPU speed (CLKIN) select iOSC/2          JP4           pins 2 & 3
                                                              closed

              DRAM CONFIGURATION

      Size          Bank 0          Bank 1

      1MB         (4) 256K x 9       NONE

      2MB         (4) 256K x 9   (4) 256K x 9

      4MB         (4) 1M x 9         NONE

      5MB         (4) 256K x 9    (4) 1M x 9

      8MB         (4) 1M x 9      (4) 1M x 9

      16MB        (4) 4M x 9         NONE

      20MB        (4) 4M x 9      (4) 1M x 9

      32MB        (4) 4M x 9      (4) 4M x 9

                            CACHE CONFIGURATION

   Size     Bank 0     Bank 1    TAG (U41)    TAG (U42)       Resistor
                                                             Installed

   64KB     (4) 8K x  (4) 8K x   (1) 8K x 8    (1) 4K x         RND
               8         8                        1

   64KB     (4) 8K x  (4) 8K x   (1) 8K x 8   (1) 16K x         RND
               8         8                        1

   64KB     (4) 8K x  (4) 8K x   (1) 8K x 8   (1) 64K x         RND
               8         8                        1

  128KB     (4) 32K     NONE     (1) 8K x 8   (1) 16K x         RNE
              x 8                                 1

  128KB     (4) 32K     NONE     (1) 8K x 8   (1) 64K x         RNE
              x 8                                 1

  256KB     (4) 32K    (4) 32K    (1) 32K x   (1) 16K x         RNF
              x 8       x 8          8            1

  256KB     (4) 32K    (4) 32K    (1) 32K x   (1) 64K x         RNF
              x 8       x 8          8            1

  Notes: If DRAM is £ 16MB, all cache sizes may be installed; if DRAM is
  >16MB, 128 or 256KB cache must be installed.

                     CPU TYPE CONFIGURATION

    Type           RNA              RNB              RNC

  80486SX     Not installed    Not installed      Installed

  80487SX     Not installed      Installed      Not installed

  ODP486SX    Not installed      Installed      Not installed

  80486DX       Installed      Not installed    Not installed

  80486DX2      Installed      Not installed    Not installed