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# AMERICAN MEGATRENDS, INC.
FAST DISK VLB
Data bus: 32-bit, VL-bus
Size: Three/quarter-length, full-height card
Hard drive Up to seven SCSI devices
supported:
Floppy drives Two 360KB, 720KB, 1.2MB, or 1.44MB
supported: drives
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Location |
|---------------------------------------------+--------------|
| 4-pin connector-Drive active LED | J1 |
|---------------------------------------------+--------------|
| 20-pin factory test connector | J2 |
|---------------------------------------------+--------------|
| 34-pin control cable connector-floppy drive | J3 |
|---------------------------------------------+--------------|
| 50-pin SCSI connector - internal | J4 |
|---------------------------------------------+--------------|
| 50-pin SCSI connector - external | J6 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Location | Setting |
|--------------------------------+--------------+------------|
| » | SCSI termination enabled | J8 | closed |
|---+----------------------------+--------------+------------|
| | SCSI termination disabled | J8 | open |
|---+----------------------------+--------------+------------|
| » | Local Bus speed < 50MHz | J11 | pins 2 & 3 |
| | | | closed |
|---+----------------------------+--------------+------------|
| | Local Bus speed > 50MHz | J11 | pins 1 & 2 |
| | | | closed |
|---+----------------------------+--------------+------------|
| » | ISA mode enabled | SW1/switch 6 | off |
|---+----------------------------+--------------+------------|
| | EISA mode enabled | SW1/switch 6 | on |
|---+----------------------------+--------------+------------|
| » | Hard drive capacity > 1GB | SW2/switch 1 | off |
| | disabled | | |
|---+----------------------------+--------------+------------|
| | Hard drive capacity > 1GB | SW2/switch 1 | on |
| | enabled | | |
|---+----------------------------+--------------+------------|
| » | Cache memory enabled | SW2/switch 2 | off |
|---+----------------------------+--------------+------------|
| | Cache memory disabled | SW2/switch 2 | on |
|---+----------------------------+--------------+------------|
| » | Single-sector commands | SW2/switch 3 | off |
| | separate caching disabled | | |
|---+----------------------------+--------------+------------|
| | Single-sector commands | SW2/switch 3 | on |
| | separate caching enabled | | |
|---+----------------------------+--------------+------------|
| » | Caching for removable | SW2/switch 4 | off |
| | drives disabled | | |
|---+----------------------------+--------------+------------|
| | Caching for removable | SW2/switch 4 | on |
| | drives enabled | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Location | Setting |
|-----------------------------------+--------------+---------|
| » | Delayed write caching enabled | SW2/switch 5 | off |
|---+-------------------------------+--------------+---------|
| | Write-through caching enabled | SW2/switch 5 | on |
|---+-------------------------------+--------------+---------|
| » | SCSI autoselection time-out | SW2/switch 6 | off |
| | enabled | | |
|---+-------------------------------+--------------+---------|
| | SCSI autoselection time-out | SW2/switch 6 | on |
| | disabled | | |
|---+-------------------------------+--------------+---------|
| » | SCSI synchronous negotiation | SW3/switch 4 | off |
| | enabled | | |
|---+-------------------------------+--------------+---------|
| | SCSI synchronous negotiation | SW3/switch 4 | on |
| | disabled | | |
|---+-------------------------------+--------------+---------|
| » | SCSI 10MB/sec data transfer | SW3/switch 5 | off |
| | rate enabled | | |
|---+-------------------------------+--------------+---------|
| | SCSI 5MB/sec data transfer | SW3/switch 5 | on |
| | rate enabled | | |
|---+-------------------------------+--------------+---------|
| » | Adaptec 154x-type target | SW3/switch 6 | off |
| | allocation disabled | | |
|---+-------------------------------+--------------+---------|
| | Adaptec 154x-type target | SW3/switch 6 | on |
| | allocation enabled | | |
|---+-------------------------------+--------------+---------|
| » | 32-bit operation (Extended | SW3/switch 7 | off |
| | Mode) enabled | | |
|---+-------------------------------+--------------+---------|
| | 32-bit operation (Extended | SW3/switch 7 | on |
| | Mode) disabled | | |
|---+-------------------------------+--------------+---------|
| » | Support for 7 drives (DOS 5.0 | SW3/switch 8 | off |
| | and later) enabled | | |
|---+-------------------------------+--------------+---------|
| | Support for 7 drives (DOS 5.0 | SW3/switch 8 | on |
| | and later) disabled | | |
|---+-------------------------------+--------------+---------|
| » | Floppy drive enabled | SW5/switch 1 | on |
|---+-------------------------------+--------------+---------|
| | Floppy drive disabled | SW5/switch 1 | off |
|---+-------------------------------+--------------+---------|
| » | Normal operation enabled | SW5/switch 2 | off |
|---+-------------------------------+--------------+---------|
| | Diagnostic mode enabled | SW5/switch 2 | on |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SCSI HOST ADAPTER SLOT NUMBER |
|------------------------------------------------------------|
| Slot Number | SW1/switch 1 | SW1/switch 2 | SW1/switch 3 |
|--------------+---------------+--------------+--------------|
| » | 1 | off | off | off |
|------+-------+---------------+--------------+--------------|
| | 2 | on | off | off |
|------+-------+---------------+--------------+--------------|
| | 3 | off | on | off |
|------+-------+---------------+--------------+--------------|
| | 4 | on | on | off |
|------+-------+---------------+--------------+--------------|
| | 5 | off | off | on |
|------+-------+---------------+--------------+--------------|
| | 6 | on | off | on |
|------+-------+---------------+--------------+--------------|
| | 7 | off | on | on |
|------+-------+---------------+--------------+--------------|
| | 8 | on | on | on |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MOTHERBOARD SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | SW1/switch 4 | SW1/switch 5 |
|----------------------+------------------+------------------|
| | 20 or 25MHz | off | off |
|---+------------------+------------------+------------------|
| » | 33 or 40MHz | on | off |
|---+------------------+------------------+------------------|
| | 50MHz | off | on |
+------------------------------------------------------------+
+------------------------------------------------------------+
| I/O PORT ADDRESS |
|------------------------------------------------------------|
| Address | SW3/switch 1 | SW3/switch 2 | SW3/switch 3 |
|---------------+--------------+--------------+--------------|
| | 130-133h | on | off | off |
|---+-----------+--------------+--------------+--------------|
| | 134-137h | on | off | on |
|---+-----------+--------------+--------------+--------------|
| | 230-233h | off | on | off |
|---+-----------+--------------+--------------+--------------|
| | 234-237h | off | on | on |
|---+-----------+--------------+--------------+--------------|
| » | 330-333h | off | off | off |
|---+-----------+--------------+--------------+--------------|
| | 334-337h | off | off | on |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DMA CHANNEL CONFIGURATION |
|------------------------------------------------------------|
| DMA Channel | SW4/switch 1 | SW4/switch 2 |
|-------------------------+-----------------+----------------|
| » | 5 | off | off |
|---+---------------------+-----------------+----------------|
| | 6 | on | off |
|---+---------------------+-----------------+----------------|
| | 7 | off | on |
|---+---------------------+-----------------+----------------|
| | No Channel selected | on | on |
+------------------------------------------------------------+
+------------------------------------------------------------+
| INRTERRUPT REQUEST CONFIGURATION |
|------------------------------------------------------------|
| IRQ | SW4/switch 3 | SW4/switch 4 | SW4/switch 5 |
|------------+---------------+---------------+---------------|
| | 9 | on | off | off |
|---+--------+---------------+---------------+---------------|
| | 10 | off | on | off |
|---+--------+---------------+---------------+---------------|
| » | 11 | off | off | off |
|---+--------+---------------+---------------+---------------|
| | 12 | on | on | off |
|---+--------+---------------+---------------+---------------|
| | 14 | off | off | on |
|---+--------+---------------+---------------+---------------|
| | 15 | on | off | on |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIOS ADDRESS |
|------------------------------------------------------------|
| Address | SW4/switch 6 | SW4/switch 7 | SW4/switch 8 |
|---------------+--------------+--------------+--------------|
| » | C8000h | off | off | off |
|---+-----------+--------------+--------------+--------------|
| | D8000h | on | off | off |
|---+-----------+--------------+--------------+--------------|
| | D4000h | off | on | off |
|---+-----------+--------------+--------------+--------------|
| | D0000h | on | on | off |
|---+-----------+--------------+--------------+--------------|
| | CC000h | off | off | on |
|---+-----------+--------------+--------------+--------------|
| | DC000h | on | off | on |
|---+-----------+--------------+--------------+--------------|
| | Disabled | off | on | on |
|---+-----------+--------------+--------------+--------------|
| | Disabled | on | on | on |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MISCELLANEOUS TECHNICAL NOTES |
|------------------------------------------------------------|
| J5 is factory configured in the closed position - do not |
| alter |
+------------------------------------------------------------+