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# IRWIN MAGNETIC SYSTEMS, INC.
4100
Card Type Tape drive controller
Chip Set Unidentified
Maximum Onboard Memory Unidentified
I/O Options Tape drive interfaces (2)
Tape drives supported AccuTrak A120 or A250 drives,
Irwin drive models 2040,2080,2120
Data Bus 8-bit ISA
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Label | Function | Label |
|-------------------------+-------+------------------+-------|
| Tape drive interface - | CN1 | Tape drive | CN3 |
| external | | interface – | |
| | | internal | |
|-------------------------+-------+------------------+-------|
| Unidentified | CN2 | Power connector | CN4 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DMA CHANNEL SELECTION |
|------------------------------------------------------------|
| Channel | SW1/5 | SW1/6 | SW1/7 | SW1/8 |
|-------------+-----------+-----------+-----------+----------|
| | 1 | On | Off | On | Off |
|----+--------+-----------+-----------+-----------+----------|
| » | 2 | Off | On | Off | On |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PARALLEL PORT ADDRESS SELECTION |
|------------------------------------------------------------|
| Setting | SW1/1 | SW1/2 | SW1/3 | SW1/4 |
|-----------------+----------+----------+----------+---------|
| » | LPT1 (370h) | Off | Off | Off | On |
|---+-------------+----------+----------+----------+---------|
| | LPT2 (300h) | Off | Off | Off | Off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PARALLEL PORT INTERRUPT SELECTION |
|------------------------------------------------------------|
| IRQ | SW1/9 | SW1/10 |
|-----------------------+-----------------+------------------|
| » | IRQ6 | Off | On |
|-----+-----------------+-----------------+------------------|
| | IRQ3 | On | Off |
+------------------------------------------------------------+