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# INTELLIGENT COMPUTER PERIPHERALS
GDT6550
Maximum Onboard Memory 32MB
Data Bus 32-bit PCI
Card Size Full-height, full-length card
Hard Drives Supported Up to 35 SCSI devices
Floppy Drives Supported None
RAID Levels Supported RAID 0, 1, 4, 5
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Label | Function | Label |
|----------------------+-------+---------------------+-------|
| 50-pin SCSI | J1 | 50-pin SCSI | J5 |
| connector - | | connector - | |
| external, channel A | | internal, channel D | |
|----------------------+-------+---------------------+-------|
| 50-pin SCSI | J2 | 50-pin SCSI | J6 |
| connector - | | connector - | |
| internal, channel A | | internal, channel C | |
|----------------------+-------+---------------------+-------|
| Drive active LEDs - | J3 | 50-pin SCSI | J7 |
| see pinout below | | connector - | |
| | | internal, channel E | |
|----------------------+-------+---------------------+-------|
| 50-pin SCSI | J4 | | |
| connector - | | | |
| internal, channel B | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| J3 PINOUT |
|------------------------------------------------------------|
| Function | Pin | Function | Pin |
|-----------------------+------+----------------------+------|
| Channel A common | 1 | Channel C active | 6 |
|-----------------------+------+----------------------+------|
| Channel A active | 2 | Channel D common | 7 |
|-----------------------+------+----------------------+------|
| Channel B common | 3 | Channel D active | 8 |
|-----------------------+------+----------------------+------|
| Channel B active | 4 | Channel E common | 9 |
|-----------------------+------+----------------------+------|
| Channel C common | 5 | Channel E active | 10 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|-----------------------------------------+-------+----------|
| » | Active termination power enabled | TA | Closed |
| | for channel A | | |
|---+-------------------------------------+-------+----------|
| | Active termination power disabled | TA | Open |
| | for channel A | | |
|---+-------------------------------------+-------+----------|
| » | Active termination power enabled | TB | Closed |
| | for channel B | | |
|---+-------------------------------------+-------+----------|
| | Active termination power disabled | TB | Open |
| | for channel B | | |
|---+-------------------------------------+-------+----------|
| » | Active termination power enabled | TC | Closed |
| | for channel C | | |
|---+-------------------------------------+-------+----------|
| | Active termination power disabled | TC | Open |
| | for channel C | | |
|---+-------------------------------------+-------+----------|
| » | Active termination power enabled | TD | Closed |
| | for channel D | | |
|---+-------------------------------------+-------+----------|
| | Active termination power disabled | TD | Open |
| | for channel D | | |
|---+-------------------------------------+-------+----------|
| » | Active termination power enabled | TE | Closed |
| | for channel E | | |
|---+-------------------------------------+-------+----------|
| | Active termination power disabled | TE | Open |
| | for channel E | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 |
|----------------------------+-------------------------------|
| 4MB | (1) 1M x 32 |
|----------------------------+-------------------------------|
| 8MB | (1) 2M x 32 |
|----------------------------+-------------------------------|
| 16MB | (1) 4M x 32 |
|----------------------------+-------------------------------|
| 32MB | (1) 8M x 32 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIAGNOSTIC LED(S) |
|------------------------------------------------------------|
| LED | Color | Status | Condition |
|-----+--------+--------+------------------------------------|
| A | Yellow | On | SCSI channel A is active |
|-----+--------+--------+------------------------------------|
| A | Yellow | Off | SCSI channel A is not active |
|-----+--------+--------+------------------------------------|
| B | Yellow | On | SCSI channel B is active |
|-----+--------+--------+------------------------------------|
| B | Yellow | Off | SCSI channel B is not active |
|-----+--------+--------+------------------------------------|
| C | Yellow | On | SCSI channel C is active |
|-----+--------+--------+------------------------------------|
| C | Yellow | Off | SCSI channel C is not active |
|-----+--------+--------+------------------------------------|
| D | Yellow | On | SCSI channel D is active |
|-----+--------+--------+------------------------------------|
| D | Yellow | Off | SCSI channel D is not active |
|-----+--------+--------+------------------------------------|
| E | Yellow | On | SCSI channel E is active |
|-----+--------+--------+------------------------------------|
| E | Yellow | Off | SCSI channel E is not active |
|-----+--------+--------+------------------------------------|
| T | Green | On | Direct memory access is in |
| | | | progress |
|-----+--------+--------+------------------------------------|
| T | Green | Off | Direct memory access is not in |
| | | | progress |
|-----+--------+--------+------------------------------------|
| S | Green | On | Card is operating normally |
|-----+--------+--------+------------------------------------|
| S | Green | Off | An error has occurred |
+------------------------------------------------------------+