GSI, INC.

MODEL 21 (1533-21-09-1)

Card Type               Hard drive controller
Hard Drives supported   Two EIDE drives
Floppy drives supported Four 360KB, 720KB, 1.2MB, 1.44MB or 2.88MB drives
Data Bus                16-bit ISA
Card Size               Half-length, half-height


[Image]

                                CONNECTIONS

          Function             Label           Function            Label

  34-pin secondary floppy       J2       40-pin EIDE connector      J6
  connector

  34-pin primary floppy         J3       Drive active LED           J8
  connector

  Auxiliary power connector     J5

            Note:J2 supports 2.88MB as well as standard floppy drives. J3
            supports only standard floppy drives.

                        USER CONFIGURABLE SETTINGS

                Function                      Label          Position

  »   Factory configured - do not alter        J4         Pins 1 & 2 open

  »   Factory configured - do not alter        J4         Pins 2 & 3 open

  »   Primary mode enabled                     J4            Pins 5 & 6
                                                              closed

      Secondary mode enabled                   J4            Pins 4 & 5
                                                              closed

            Note:Primary mode selects IRQ 14, I/O address 1F0h & 3F6h for
            hard drives, IRQ 6, DMA 2, I/O address 3F0h for floppy drives

            Secondary mode selects IRQ 15, I/O address 170h & 376h for
            hard drives, IRQ 6, DMA 2, I/O address 370h for floppy
            drives.

                   BIOS ADDRESS SELECTION

           Address                         J4

            C8000h             Pins 7 & 8, 10 & 11 closed

            CC000h             Pins 7 & 8, 11 & 12 closed

            D0000h             Pins 8 & 9, 10 & 11 closed

            E0000h             Pins 8 & 9, 11 & 12 closed