
COGENT DATA TECHNOLOGIES, INC.

DISKMASTER

Data bus: 16-bit, ISA

Size: Full-length, full-height card

Hard drives supported: Two RLL ST506/412 and two ESDI drives, or

four ESDI drives may be daisy-chained off of CN2

Floppy drives supported: Two 360KB, 720KB, 1.2MB, or 1.44MB

[Image]

                                CONNECTIONS

                     Function                             Location

  34-pin control cable connector-ST506 hard                 CN1
  drives

  34-pin control cable connector-ESDI hard drives           CN2

  34-pin data cable connector-floppy drive                  CN3

  20-pin data cable connector-drive 1                       CN4

  20-pin data cable connector-drive 2                       CN5

  20-pin data cable connector-drive 3                       CN6

  20-pin data cable connector-drive 4                       CN7

  6-pin EACK connector - (For use with an                   CN9
  E/MASTER Ethernet board)

  6-pin ERQ connector - (For use with an E/MASTER           CN10
  Ethernet board)

  4-pin connector-drive active LED                          CN31

                        USER CONFIGURABLE SETTINGS

               Function                    Location           Setting

     No DMA expansion                       JP4              closed

      Supports E/Master ethernet             JP4               open

     Drive 4 is an ST506                    JP5*            pins 1 & 2
                                                              closed

      Drive 4 is an ESDI                     JP5*            pins 2 & 3
                                                              closed

     Drive 3 is an ST506                    JP6*            pins 1 & 2
                                                              closed

      Drive 3 is an ESDI                     JP6*            pins 2 & 3
                                                              closed

     Drive 2 is an ESDI                     JP7*            pins 2 & 3
                                                              closed

      Drive 2 is an ST506                    JP7*            pins 1 & 2
                                                              closed

     Drive 1 is an ESDI                     JP8*            pins 2 & 3
                                                              closed

      Drive 1 is an ST506                    JP8*            pins 1 & 2
                                                              closed

     Floppy drive enabled                   JP36            pins 2 & 3
                                                              closed

      Floppy drive disabled                  JP36            pins 1 & 2
                                                              closed

     Reserved for future use              JP37-39             open

  Note:* Both pin sets must be set alike

                      CONTROLLER CLOCK CONFIGURATION

               Function                      JP40              JP41

     Set at 10MHz                        pins 2 & 3         pins 1 & 2
                                            closed            closed

      Disabled, bus clock timing          pins 1 & 2         pins 2 & 3
      enabled                               closed            closed

                                DMA CHANNEL

       DRQ        JP1 & JP2/jumper    JP1 & JP2/jumper   JP1 & JP2/jumper
                         1                   2                  3

      DRQ5             closed              open               open

     DRQ6              open              closed              open

      DRQ7              open               open              closed

                          INTERRUPT REQUEST - JP3

  #    Jumper    Jumper    Jumper    Jumper   Jumper    Jumper   Jumper 7
         1         2         3         4        5         6

  3    closed     open     open      open      open      open      open

  5     open     closed    open      open      open      open      open

  9     open      open    closed     open      open      open      open

  10    open      open     open     closed     open      open      open

  12    open      open     open      open     closed     open      open

  14    open      open     open      open      open     closed     open

  15    open      open     open      open      open      open     closed

                               BIOS ADDRESS

  ADDRESS     BINARY     JP18     JP17    JP16     JP15    JP14     JP13

   C8000      1100100     Pins    Pins     Pins    Pins     Pins    Pins
                          1-2     2-3      2-3     1-2      2-3     2-4

  Note:Pins designated should be in the closed position.

[Image]

  Binary one     Binary zero    Binary zero

 PROM size 8KB  PROM size 8KB  PROM size 16KB

                       MISCELLANEOUS TECHNICAL NOTES

    The BIOS address settings range is C800 - E000 and is selected with
     JP12-19 using a binary translation. JP12 (LSB) and JP19 (MSB) are
   internal and assumed to be 0 and 1 respectively. JP13 - JP18 are set:
         pins 1-2 closed= 1; pins 2-3 closed= 0. Default is C8000:

   In addition to serving as the 2 1 place in the BIOS address selection,
   JP13 is also used to determine PROM size (8KB or 16KB). Due to the pin
     assignment a PROM cannot have an address with a 1 in the 2 1 place
               (such as 110001 1 0) and be 16KB (see above).

