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# WESTERN DIGITAL CORPORATION
XTAT-FASST
+------------------------------------------------------------+
|------------------------------------------------------------|
| Data bus: | 8-bit, ISA |
|--------------------------+---------------------------------|
| Size: | Half-length, full-height card |
|--------------------------+---------------------------------|
| Hard drive supported: | Up to seven SCSI devices |
|--------------------------+---------------------------------|
| Floppy drives supported: | None |
+------------------------------------------------------------+
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Location |
|--------------------------------------------+---------------|
| 50-pin SCSI Interface connector - internal | J1 |
|--------------------------------------------+---------------|
| 50-pin SCSI Interface connector - external | J2 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| I/O OPTIONS - W1 |
|------------------------------------------------------------|
| DMA | Jumper 1 | Jumper 2 | Jumper 3 |
|---------------------------+----------+----------+----------|
| » | Single Byte | open | open | open |
| | Programmed I/O | | | |
|---+-----------------------+----------+----------+----------|
| | DMA Cannel 1 | closed | open | open |
|---+-----------------------+----------+----------+----------|
| | Demand Drive I/O | open | closed | open |
|---+-----------------------+----------+----------+----------|
| | DMA Channel 3 | closed | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| INTERRUPT REQUEST |
|------------------------------------------------------------|
| IRQ | W1/jumper 4 | W1/jumper 5 | W1/jumper | W4 |
| | | | 6 | |
|------+-------------+-------------+-----------+-------------|
| IRQ2 | open | closed | open | Jumper 1 - |
| | | | | closed |
|------+-------------+-------------+-----------+-------------|
| IRQ3 | closed | closed | open | Jumper 2 - |
| | | | | closed |
|------+-------------+-------------+-----------+-------------|
| IRQ4 | open | open | closed | Jumper 3 - |
| | | | | closed |
|------+-------------+-------------+-----------+-------------|
| IRQ5 | closed | open | closed | Jumper 4 - |
| | | | | closed |
|------+-------------+-------------+-----------+-------------|
| IRQ6 | open | closed | closed | Jumper 5 - |
| | | | | closed |
|------+-------------+-------------+-----------+-------------|
| IRQ7 | closed | closed | closed | Jumper 6 - |
| | | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| I/O PORT ADDRESS - W2 |
|------------------------------------------------------------|
| Address | Jumper 1 | Jumper 2 | Jumper3 | Jumper 4 |
|-----------+------------+------------+----------+-----------|
| 200h | closed | closed | closed | closed |
|-----------+------------+------------+----------+-----------|
| 220h | open | closed | closed | closed |
|-----------+------------+------------+----------+-----------|
| 240h | closed | open | closed | closed |
|-----------+------------+------------+----------+-----------|
| 260h | open | open | closed | closed |
|-----------+------------+------------+----------+-----------|
| 280h | closed | closed | open | closed |
|-----------+------------+------------+----------+-----------|
| 2A0h | open | closed | open | closed |
|-----------+------------+------------+----------+-----------|
| 2C0h | closed | open | open | closed |
|-----------+------------+------------+----------+-----------|
| 2E0h | open | open | open | closed |
|-----------+------------+------------+----------+-----------|
| 300h | closed | closed | closed | open |
|-----------+------------+------------+----------+-----------|
| 320h | open | closed | closed | open |
|-----------+------------+------------+----------+-----------|
| 340h | closed | open | closed | open |
|-----------+------------+------------+----------+-----------|
| 360h | open | open | closed | open |
|-----------+------------+------------+----------+-----------|
| 380h | closed | closed | open | open |
|-----------+------------+------------+----------+-----------|
| 3A0h | open | closed | open | open |
|-----------+------------+------------+----------+-----------|
| 3C0h | closed | open | open | open |
|-----------+------------+------------+----------+-----------|
| 3E0h | open | open | open | open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIOS ADDRESS - W3 |
|------------------------------------------------------------|
| Address | Jumper 1 | Jumper 2 | Jumper 3 | Jumper 4 |
|------------+-----------+-----------+-----------+-----------|
| | C000h | closed | closed | closed | closed |
|---+--------+-----------+-----------+-----------+-----------|
| | C400h | open | closed | closed | closed |
|---+--------+-----------+-----------+-----------+-----------|
| » | C800h | closed | open | closed | closed |
|---+--------+-----------+-----------+-----------+-----------|
| | CC00h | open | open | closed | closed |
|---+--------+-----------+-----------+-----------+-----------|
| | D000h | closed | closed | open | closed |
|---+--------+-----------+-----------+-----------+-----------|
| | D4OOh | open | closed | open | closed |
|---+--------+-----------+-----------+-----------+-----------|
| | D800h | closed | open | open | closed |
|---+--------+-----------+-----------+-----------+-----------|
| | DC00h | open | open | open | closed |
|---+--------+-----------+-----------+-----------+-----------|
| | E000h | closed | closed | closed | open |
|---+--------+-----------+-----------+-----------+-----------|
| | E400h | open | closed | closed | open |
|---+--------+-----------+-----------+-----------+-----------|
| | E800h | closed | open | closed | open |
|---+--------+-----------+-----------+-----------+-----------|
| | EC00h | open | open | closed | open |
|---+--------+-----------+-----------+-----------+-----------|
| | F000h | closed | closed | open | open |
|---+--------+-----------+-----------+-----------+-----------|
| | F4OOh | open | closed | open | open |
|---+--------+-----------+-----------+-----------+-----------|
| | F800h | closed | open | open | open |
|---+--------+-----------+-----------+-----------+-----------|
| | FC00h | open | open | open | open |
+------------------------------------------------------------+