TMC RESEARCH CORPORATION

PAT48PX (LOCAL BUS)

Processor        80486SX/80487SX/80486DX/ODP486SX/80486DX2
Processor Speed  20/25/33/40(internal)/50/66(internal)MHz
Chip Set         OPTI
Max. Onboard     32MB
DRAM
Cache            64/128/256KB
BIOS             AMI
Dimensions       330mm x 218mm
I/O Options      32-bit external memory card slot, 32-bit local bus card
                 slots (2)
NPU Options      4167

[Image]

                                CONNECTIONS

  Purpose              Location      Purpose                  Location

  External battery        J10        IDE LED in             J23 pins 10 &
                                                                 20

  Speaker             J23 pins 1 -   Power LED &            J23 pins 11 -
                           4         keylock                     15

  Turbo switch        J23 pins 7 &   IDE LED out                JP12
                          17

  Turbo LED           J23 pins 8 &   32-bit local bus        LB1 & LB2
                          18         card

  Reset switch        J23 pins 9 &   32-bit external             S1
                          19         memory card

  Note:Local bus slots may also be used as normal ISA slots.

                        USER CONFIGURABLE SETTINGS

                Function                      Jumper         Position

  »   Monitor type select color                JP1            Closed

      Monitor type select monochrome           JP1             Open

  »   CMOS memory normal operation             JP2           pins 2 & 3
      (internal battery)                                      closed

      CMOS memory normal operation             JP2             Open
      (external battery at J4)

      CMOS memory clear                        JP2           pins 1 & 2
                                                              closed

  »   Bus speed select CLKIN/4                 JP3             Open

      Bus speed select CLKIN/6                 JP3            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 (U33)    TAG (U34)       Resistor
                                                             Installed

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

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

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

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

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

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

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

  Notes: If DRAM is £ 16MB, all cache sizes may be installed, if DRAM is
  > 16MB and £ 32MB,

  128 or 256KB cache must be installed, if DRAM > 32MB, 256KB cache must
  be installed.

  (Memory over 32MB would be installed on the proprietary external memory
  card.)

                     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