
UNIDENTIFIED

UC 4915-C AIO

Processor     80486SX/CX487SX/80486DX/80486DX2/P23N/P23T/Pentium Overdrive
Processor     25/33/40/50(internal)/50/66(internal)MHz
Speed
Chip Set      UMC
Max. Onboard  64MB
DRAM
Cache         64/128/256KB
BIOS          AMI
Dimensions    330mm x 218mm
I/O Options   Floppy drive interface, game port, IDE interface, parallel
              port, serial ports (2)
NPU Options   None

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  External battery            J1       Speaker                     J9

  Serial port 1               J2       IDE interface LED          JP14

  Game port                   J4       Power LED & keylock        JP40

  Parallel port               J5       Reset switch               JP41

  Serial port 2               J6       Turbo switch               JP42

  Floppy drive interface      J7       Turbo LED                  JP43

  IDE interface               J8

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

     BIOS type select EPROM                  JP2           pins 1 & 2
                                                              closed

      BIOS type select flash BIOS             JP2           pins 2 & 3
                                                              closed

     Floppy drive interface enabled          JP3           pins 1 & 2
                                                              closed

      Floppy drive interface disabled         JP3           pins 2 & 3
                                                              closed

     Parallel port enabled                   JP4           pins 1 & 2
                                                              closed

      Parallel port disabled                  JP4           pins 2 & 3
                                                              closed

     COM2/4 enabled                          JP5           pins 1 & 2
                                                              closed

      COM2/4 disabled                         JP5           pins 2 & 3
                                                              closed

     COM2 enabled                            JP6           pins 1 & 2
                                                              closed

      COM4 enabled                            JP6           pins 2 & 3
                                                              closed

     COM1 enabled                            JP7           pins 1 & 2
                                                              closed

      COM3 enabled                            JP7           pins 2 & 3
                                                              closed

     COM1/3 enabled                          JP8           pins 1 & 2
                                                              closed

      COM1/3 disabled                         JP8           pins 2 & 3
                                                              closed

     Printer I/O port select LPT2            JP9           pins 1 & 2
                                                              closed

      Printer I/O port select LPT3            JP9           pins 2 & 3
                                                              closed

     Monitor type select monochrome          JP10          pins 1 & 2
                                                              closed

      Monitor type select color               JP10          pins 2 & 3
                                                              closed

     Game port enabled                       JP11          pins 1 & 2
                                                              closed

      Game port disabled-                     JP11          pins 2 & 3
                                                              closed

     Hard drive installed                    JP12          pins 2 & 3
                                                              closed

      Hard drive not installed                JP12          pins 1 & 2
                                                              closed

     IDE interface enabled                   JP13          pins 1 & 2
                                                              closed

      IDE interface disabled                  JP13          pins 2 & 3
                                                              closed

     Weitek VGA card not installed           JP30          pins 1 & 2
                                                              closed

      Weitek VGA card installed               JP30          pins 2 & 3
                                                              closed

                            DRAM CONFIGURATION

     Size         Bank 0         Bank 1         Bank 2         Bank 3

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

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

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

     3MB        (1) 512K x        NONE        (1) 256K x        NONE
                    36                            36

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

     4MB        (1) 512K x        NONE        (1) 256K x    (1) 256K x 36
                    36                            36

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

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

     4MB       (1) 1M x 36        NONE           NONE           NONE

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

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

     6MB       (1) 1M x 36     (1) 256K x     (1) 256K x        NONE
                                   36             36

     7MB        (1) 512K x        NONE       (1) 1M x 36    (1) 256K x 36
                    36

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

                        DRAM CONFIGURATION (CONT)

     Size         Bank 0         Bank 1         Bank 2         Bank 3

     8MB       (1) 2M x 36        NONE           NONE           NONE

     8MB       (1) 1M x 36    (1) 1M x 36        NONE           NONE

     9MB       (1) 2M x 36        NONE        (1) 256K x        NONE
                                                  36

     9MB       (1) 1M x 36    (1) 1M x 36     (1) 256K x        NONE
                                                  36

     10MB       (1) 512K x        NONE       (1) 2M x 36        NONE
                    36

     10MB      (1) 2M x 36        NONE        (1) 256K x    (1) 256K x 36
                                                  36

     10MB      (1) 2M x 36        NONE        (1) 512K x        NONE
                                                  36

     10MB      (1) 1M x 36    (1) 1M x 36     (1) 256K x    (1) 256K x 36
                                                  36

     12MB      (1) 2M x 36        NONE       (1) 1M x 36        NONE

     12MB      (1) 1M x 36    (1) 1M x 36    (1) 1M x 36        NONE

     13MB      (1) 2M x 36        NONE       (1) 1M x 36    (1) 256K x 36

     13MB      (1) 1M x 36    (1) 1M x 36    (1) 1M x 36    (1) 256K x 36

     16MB      (1) 2M x 36        NONE       (1) 1M x 36     (1) 1M x 36

     16MB      (1) 2M x 36        NONE       (1) 2M x 36        NONE

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

     16MB      (1) 4M x 36        NONE           NONE           NONE

     17MB      (1) 4M x 36     (1) 256K x        NONE           NONE
                                   36

     18MB       (1) 512K x        NONE       (1) 4M x 36        NONE
                    36

     18MB      (1) 4M x 36     (1) 256K x     (1) 256K x        NONE
                                   36             36

     19MB       (1) 512K x        NONE       (1) 4M x 36    (1) 256K x 36
                    36

     19MB      (1) 4M x 36     (1) 256K x     (1) 256K x    (1) 256K x 36
                                   36             36

     20MB      (1) 4M x 36    (1) 1M x 36        NONE           NONE

     21MB      (1) 4M x 36    (1) 1M x 36     (1) 256K x        NONE
                                                  36

     22MB       (1) 512K x        NONE       (1) 4M x 36     (1) 1M x 36
                    36

     22MB      (1) 4M x 36    (1) 1M x 36     (1) 256K x    (1) 256K x 36
                                                  36

     24MB      (1) 2M x 36        NONE       (1) 4M x 36        NONE

     24MB      (1) 4M x 36    (1) 1M x 36    (1) 1M x 36        NONE

     25MB      (1) 2M x 36        NONE       (1) 4M x 36    (1) 256K x 36

     25MB      (1) 4M x 36    (1) 1M x 36    (1) 1M x 36    (1) 256K x 36

     28MB      (1) 2M x 36        NONE       (1) 4M x 36     (1) 1M x 36

     28MB      (1) 4M x 36    (1) 1M x 36    (1) 1M x 36     (1) 1M x 36

     32MB      (1) 4M x 36    (1) 4M x 36        NONE           NONE

     33MB      (1) 4M x 36    (1) 4M x 36     (1) 256K x        NONE
                                                  36

     34MB      (1) 4M x 36    (1) 4M x 36     (1) 256K x    (1) 256K x 36
                                                  36

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

     36MB      (1) 4M x 36    (1) 4M x 36    (1) 1M x 36        NONE

     37MB      (1) 4M x 36    (1) 4M x 36    (1) 1M x 36    (1) 256K x 36

     40MB      (1) 2M x 36        NONE       (1) 4M x 36     (1) 4M x 36

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

     48MB      (1) 4M x 36    (1) 4M x 36    (1) 4M x 36        NONE

     49MB      (1) 4M x 36    (1) 4M x 36    (1) 4M x 36    (1) 256K x 36

     52MB      (1) 4M x 36    (1) 4M x 36    (1) 4M x 36     (1) 1M x 36

     64MB      (1) 4M x 36    (1) 4M x 36    (1) 4M x 36     (1) 4M x 36

                    CACHE CONFIGURATION

     Size          Bank 0         Bank 1          TAG

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

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

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

                        CACHE JUMPER CONFIGURATION

    Size         JP31           JP34            JP35            JP36

    64KB         Open           Open            Open         pins 1 & 2
                                                               closed

   128KB         Open          Closed        pins 2 & 3      pins 2 & 3
                                               closed          closed

   256KB        Closed         Closed        pins 1 & 2      pins 1 & 2
                                               closed          closed

                          CPU TYPE CONFIGURATION

           Type                     JP38                    JP39

          80486SX             pins 2 & 3 closed             Open

          80486DX             pins 1 & 2, 3 & 4       pins 2 & 3 closed
                                   closed

         80486DX2             pins 1 & 2, 3 & 4       pins 2 & 3 closed
                                   closed

           P23N               pins 1 & 2, 3 & 4       pins 1 & 2 closed
                                   closed

           P23T               pins 1 & 2, 3 & 4       pins 1 & 2 closed
                                   closed

     Pentium Overdrive        pins 1 & 2, 3 & 4       pins 2 & 3 closed
                                   closed

                     CPU TYPE CONFIGURATION (CX487SX)

        Type               JP21              JP25              JP37

      Installed          pins 1 & 2       pins 1 & 2        pins 1 & 2
                          closed            closed            closed

    Not installed        pins 2 & 3       pins 2 & 3        pins 2 & 3
                          closed            closed            closed

   CPU SPEED CONFIGURATION

  Speed      JP26      JP27

  25MHz     Closed    Closed

  33MHz      Open     Closed

  40MHz     Closed     Open

  50iMHz    Closed    Closed

  50MHz      Open      Open

  66iMHz     Open     Closed

