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# TEKRAM TECHNOLOGY CO., LTD.
DC-820
+------------------------------------------------------------+
|------------------------------------------------------------|
| Data bus: | 32-bit, EISA |
|-------------------+----------------------------------------|
| Size: | Full-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 |
|-----------------------------------------------+------------|
| 50-pin SCSI connector - external | CN1 |
|-----------------------------------------------+------------|
| 50-pin SCSI connector - internal | CN2 |
|-----------------------------------------------+------------|
| 34-pin control cable connector - floppy drive | CN3 |
|-----------------------------------------------+------------|
| 4-pin connector - drive active LED | JP1 |
|-----------------------------------------------+------------|
| 4-pin connector - cache error speaker | JP2 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Location | Setting |
|-------------------------------+--------------+-------------|
| ยป | Floppy drive enabled | JP3 | closed |
|---+---------------------------+--------------+-------------|
| | Floppy drive disabled | JP3 | open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRIVE ACTIVE LED ERROR CODES (IMMEDIATELY AFTER POWER-UP) |
|------------------------------------------------------------|
| Status | Function |
|---------------------------+--------------------------------|
| One short flash | DC-820 CPU error |
|---------------------------+--------------------------------|
| Two short flashes | SCSI chip error |
|---------------------------+--------------------------------|
| Three short flashes | BMIC (EISA bus) chip error |
|---------------------------+--------------------------------|
| Four short flashes | SRAM error |
|---------------------------+--------------------------------|
| Five short flashes | EPROM checksum error |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MISCELLANEOUS TECHNICAL NOTES |
|------------------------------------------------------------|
| All four sockets of Bank 0 must be filled with SIMMs of |
| the same size - 256KB, 1MB, or 4MB. |
+------------------------------------------------------------+