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# ALPHA RESEARCH CORPORATION
S455I EISA
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+------------------------------------------------------------+
Data bus: 32-bit, EISA
Size: Half-length, full-height card
Hard drive supported: IDE (AT) interface drives (4)
Floppy drives supported: 360KB, 720KB, 1.2MB, or 1.44MB (2)
IMG IMG 1
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| CONNECTIONS |
|------------------------------------------------------------|
| Function | Location |
|--------------------------------------------+---------------|
| IDE drive interface (Primary) | CN1 |
|--------------------------------------------+---------------|
| IDE drive interface (Secondary) | CN2 |
|--------------------------------------------+---------------|
| Floppy drive interface | CN3 |
|--------------------------------------------+---------------|
| Hard Drive activity LED | JP1 |
|--------------------------------------------+---------------|
| Speaker | JP2 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Location | Setting |
|---------------------------------------+----------+---------|
| » | IDE Bus 1 (CN1) resistors open | JDR0 | open |
|---+-----------------------------------+----------+---------|
| | IDE Bus 1 (CN1) resistors shorted | JDR0 | closed |
|---+-----------------------------------+----------+---------|
| » | IDE Bus 2 (CN2) resistors open | JDR1 | open |
|---+-----------------------------------+----------+---------|
| | IDE Bus 2 (CN2) resistors shorted | JDR1 | closed |
+------------------------------------------------------------+
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| MISCELLANEOUS TECHNICAL NOTES |
|------------------------------------------------------------|
| When using this controller, the system will see the drives |
| attached to each connector as a single drive. i.e.: if you |
| have two 100MB drives attached to CN1 the system will see |
| one 200MB drive. However, if have two drives you would |
| like to be recognize individually, you may attach one to |
| CN1 and the other to CN2. |
| |
| Closing Jumpers JDR0 and JDR1, shorting the resistors on |
| the IDE buses, helps to eliminated drive incompatibility |
| caused by different noise filtration methods. |
| |
| This controller supports 256KB, 1MB, or 4MB fast page mode |
| SIMM's, 80nsec or faster. Both sockets of a bank must be |
| filled with the same size SIMM's; and at least one bank |
| must be filled for proper operation. |
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