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# NCL AMERICA
NCL 538B
+------------------------------------------------------------+
+------------------------------------------------------------+
Data bus: 16-bit, ISA
Size: Half-length, full-height card
Hard drives supported: Two AT Interface (IDE) drives
Floppy drives supported: Two 360KB, 720KB, 1.2MB, or 1.44MB
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Location |
|----------------------------------------------+-------------|
| 34-pin control cable connector-floppy drive | CN3 |
|----------------------------------------------+-------------|
| 40-pin AT Interface (IDE) connector | CN4 |
|----------------------------------------------+-------------|
| 4-pin connector-drive active LED | CN10 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Location | Setting |
|------------------------------------+----------+------------|
| » | DACK2 (Floppy drive DMA | JP1 | pins 1 & 2 |
| | Acknowledge) (hard-wired) | | closed |
|---+--------------------------------+----------+------------|
| | DACK3 (Floppy drive DMA | JP1 | pins 2 & 3 |
| | Acknowledge) | | closed |
|---+--------------------------------+----------+------------|
| » | IRQ6 (Floppy drive Interrupt | JP2 | pins 1 & 2 |
| | Request) (hard-wired) | | closed |
|---+--------------------------------+----------+------------|
| | IRQ10 (Floppy drive Interrupt | JP2 | pins 2 & 3 |
| | Request) | | closed |
|---+--------------------------------+----------+------------|
| » | IRQ14 (Hard drive Interrupt | JP3 | pins 1 & 2 |
| | Request) | | closed |
|---+--------------------------------+----------+------------|
| | IRQ15 (Hard drive Interrupt | JP3 | pins 2 & 3 |
| | Request) | | closed |
|---+--------------------------------+----------+------------|
| » | DRQ2 (Floppy drive DMA | JP4 | pins 1 & 2 |
| | Request) (hard-wired) | | closed |
|---+--------------------------------+----------+------------|
| | DRQ3 (Floppy drive DMA | JP4 | pins 2 & 3 |
| | Request) | | closed |
|---+--------------------------------+----------+------------|
| » | Hard drive port address is | JP6 | open |
| | 1FO-1F7h | | |
|---+--------------------------------+----------+------------|
| | Hard drive port address is | JP6 | closed |
| | 17O-177h | | |
|---+--------------------------------+----------+------------|
| » | Floppy drive port address is | JP7 | open |
| | 3F2-3F7h | | |
|---+--------------------------------+----------+------------|
| | Floppy drive port address is | JP7 | closed |
| | 372-377h | | |
|---+--------------------------------+----------+------------|
| » | Normal operation | JP8 | open |
|---+--------------------------------+----------+------------|
| | Diagnostic mode | JP8 | closed |
|---+--------------------------------+----------+------------|
| » | Zero wait state disabled | JP9 | open |
|---+--------------------------------+----------+------------|
| | Zero wait state enabled | JP9 | closed |
|---+--------------------------------+----------+------------|
| » | BIOS enabled | JP11 | closed |
|---+--------------------------------+----------+------------|
| | BIOS disabled | JP11 | open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIOS ADDRESS |
|------------------------------------------------------------|
| Address | Jumper JP5 | Jumper JP5A |
|-------------------+-------------------+--------------------|
| » | C800h | open | open |
|---+---------------+-------------------+--------------------|
| | CC00h | closed | open |
|---+---------------+-------------------+--------------------|
| | D800h | open | closed |
|---+---------------+-------------------+--------------------|
| | DC00h | closed | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MISCELLANEOUS TECHNICAL NOTES |
|------------------------------------------------------------|
| Debug: G=C800:5 sets up custom parameters for IDE drives |
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