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# NCL AMERICA
NCL 537B
+------------------------------------------------------------+
|------------------------------------------------------------|
| Data bus: | 16-bit, ISA |
|-------------------+----------------------------------------|
| Size: | Half-length, full-height card |
|-------------------+----------------------------------------|
| Hard drive | Two IDE (AT) Interface drives |
| supported: | |
|-------------------+----------------------------------------|
| Floppy drives | Two 360KB, 720KB, 1.2MB, or 1.44MB |
| supported: | drives |
+------------------------------------------------------------+
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Location |
|-----------------------------------------------+------------|
| 34-pin control cable connector - floppy drive | J3 |
|-----------------------------------------------+------------|
| 40-pin IDE(AT) Interface connector | J4 |
|-----------------------------------------------+------------|
| 4-pin connector - Drive active LED | JP10 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Location | Setting |
|------------------------------------+----------+------------|
| » | Floppy drive DMA Acknowledge | JP1 | pins 1 & 2 |
| | is DACK2 | | closed |
|---+--------------------------------+----------+------------|
| | Floppy drive DMA Acknowledge | JP1 | pins 2 & 3 |
| | is DACK3 | | closed |
|---+--------------------------------+----------+------------|
| » | Interrupt Request is IRQ6 | JP2 | pins 1 & 2 |
| | | | closed |
|---+--------------------------------+----------+------------|
| | Interrupt Request is IRQ10 | JP2 | pins 2 & 3 |
| | | | closed |
|---+--------------------------------+----------+------------|
| » | Hard drive Interrupt is IRQ14 | JP3 | pins 1 & 2 |
| | | | closed |
|---+--------------------------------+----------+------------|
| | Hard drive Interrupt is IRQ15 | JP3 | pins 2 & 3 |
| | | | closed |
|---+--------------------------------+----------+------------|
| » | Floppy drive DMA Request is | JP4 | pins 1 & 2 |
| | DREQ2 | | closed |
|---+--------------------------------+----------+------------|
| | Floppy drive DMA Request is | JP4 | pins 2 & 3 |
| | DREQ3 | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Location | Setting |
|---------------------------------------+----------+---------|
| » | Hard drive port address is | JP6 | open |
| | 1F0-1F7h | | |
|---+-----------------------------------+----------+---------|
| | Hard drive port address is | JP6 | closed |
| | 170-177h | | |
|---+-----------------------------------+----------+---------|
| » | Floppy drive port address is | JP7 | open |
| | 3F2-3F7h | | |
|---+-----------------------------------+----------+---------|
| | Floppy drive port address is | JP7 | closed |
| | 372-377h | | |
|---+-----------------------------------+----------+---------|
| » | Normal operation enabled | JP8 | open |
|---+-----------------------------------+----------+---------|
| | Diagnostic mode enabled | JP8 | closed |
|---+-----------------------------------+----------+---------|
| » | I/O Channel Ready signal disabled | JP9 | open |
|---+-----------------------------------+----------+---------|
| | I/O Channel Ready signal enabled | JP9 | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MISCELLANEOUS TECHNICAL NOTES |
|------------------------------------------------------------|
| Trace must be cut to change Jumpers JP1, JP2, JP3, and |
| JP4. |
+------------------------------------------------------------+