COMPUADD, INC.
==============

   HARDCACHE/ESDI

   +------------------------------------------------------------+
   +------------------------------------------------------------+

   Data bus: 16-bit, ISA

   Size: Full-length, full-height card

   Hard drives supported:  Two RLL ESDI drives

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

<gopher://bitreich.org/I/th99/c/C-D/20044-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |                 Function                  |    Location    |
   |-------------------------------------------+----------------|
   | 20-pin data cable connector-drive 1       |       J1       |
   |-------------------------------------------+----------------|
   | 20-pin data cable connector-drive 0       |       J2       |
   |-------------------------------------------+----------------|
   | 34-pin data cable connector-floppy drive  |       J3       |
   |-------------------------------------------+----------------|
   | 34-pin control cable connector-hard drive |       J4       |
   |-------------------------------------------+----------------|
   | 4-pin connector-drive active LED          |       J5       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |              Function              | Location |  Setting   |
   |------------------------------------+----------+------------|
   |>> | Floppy drive type is AT-type   |    W1    | pins 1 & 2 |
   |   |                                |          |   closed   |
   |---+--------------------------------+----------+------------|
   |   | Floppy drive type is PS/2 type |    W1    | pins 2 & 3 |
   |   | 1.44MB                         |          |   closed   |
   |---+--------------------------------+----------+------------|
   |>> | Floppy Drive Interrupt is IRQ6 |    W2    | pins 1 & 2 |
   |   |                                |          |   closed   |
   |---+--------------------------------+----------+------------|
   |   | Floppy Drive Interrupt is      |    W2    | pins 2 & 3 |
   |   | IRQ10                          |          |   closed   |
   |---+--------------------------------+----------+------------|
   |>> | Floppy Drive DMA Acknowledge   |    W3    | pins 1 & 2 |
   |   | is DACK2                       |          |   closed   |
   |---+--------------------------------+----------+------------|
   |   | Floppy Drive DMA Acknowledge   |    W3    | pins 2 & 3 |
   |   | is DACK3                       |          |   closed   |
   |---+--------------------------------+----------+------------|
   |>> | Floppy Drive DMA Request is    |    W4    | pins 1 & 2 |
   |   | DREQ2                          |          |   closed   |
   |---+--------------------------------+----------+------------|
   |   | Floppy Drive DMA Request is    |    W4    | pins 2 & 3 |
   |   | DREQ3                          |          |   closed   |
   |---+--------------------------------+----------+------------|
   |>> | Hard drive address 1F0-1F7h    |    W5    |    open    |
   |---+--------------------------------+----------+------------|
   |   | Hard drive address 170-177h    |    W5    |   closed   |
   |---+--------------------------------+----------+------------|
   |>> | Floppy drive address 3F0-3F7h  |    W6    |    open    |
   |---+--------------------------------+----------+------------|
   |   | Floppy drive address 370-377h  |    W6    |   closed   |
   |---+--------------------------------+----------+------------|
   |>> | BIOS enabled                   |    W7    |   closed   |
   |---+--------------------------------+----------+------------|
   |   | BIOS disabled                  |    W7    |    open    |
   |---+--------------------------------+----------+------------|
   |>> | BIOS address C800-C9FFh        |    W8    |    open    |
   |---+--------------------------------+----------+------------|
   |   | BIOS address CA00-CBFFh        |    W8    |   closed   |
   |---+--------------------------------+----------+------------|
   |>> | Floppy drive enabled           |    W9    |    open    |
   |---+--------------------------------+----------+------------|
   |   | Floppy drive disabled          |    W9    |   closed   |
   |---+--------------------------------+----------+------------|
   |>> | Floppy drive single spindle    |   W10    |    open    |
   |   | speed enabled                  |          |            |
   |---+--------------------------------+----------+------------|
   |   | Floppy drive dual spindle      |   W10    |   closed   |
   |   | speed enabled                  |          |            |
   |---+--------------------------------+----------+------------|
   |>> | 256KB SIMM's supported         |   W11    | pins 1 & 2 |
   |   |                                |          |   closed   |
   |---+--------------------------------+----------+------------|
   |   | 1MB SIMM's supported           |   W11    | pins 2 & 3 |
   |   |                                |          |   closed   |
   |---+--------------------------------+----------+------------|
   |>> | Block Data Transfer mode       |   W12    | pins 1 & 2 |
   |   | enabled                        |          |   closed   |
   |---+--------------------------------+----------+------------|
   |   | IRQ-Paced Data Transfer mode   |   W12    | pins 2 & 3 |
   |   | enabled                        |          |   closed   |
   |---+--------------------------------+----------+------------|
   |>> | Factory configured - do not    |   W13    |    open    |
   |   | alter                          |          |            |
   +------------------------------------------------------------+