NCL AMERICA
NCL 5455, NCL 5456
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Data bus: |
16-bit, ISA |
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Size: |
Half-length, full-height card |
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Hard drives supported: |
Two ST506/412 MFM drives |
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Floppy drives supported: |
NCL 5455: Two 360 KB, 720 KB, 1.2 MB or 1.44 MB drives |
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NCL 5456: None | |
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CONNECTIONS | |
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34-pin control cable connector-hard drive |
CN1 |
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20-pin data cable connector-drive 0 |
CN2 |
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20-pin data cable connector-drive 1 |
CN3 |
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34-pin data cable connector-floppy drive (NCL 5455 only) |
CN4 |
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4-pin connector-drive active LED |
CN5 |
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5-pin DC power connector |
CN6 |
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USER CONFIGURABLE SETTINGS | |||
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Function |
Location |
Setting | |
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Hard drive address is 1F0-1F7h |
JP1 |
pins 1 & 2 closed | |
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Hard drive address is 170-177h |
JP1 |
pins 2 & 3 closed | |
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32Kb ROM enabled |
JP2 |
pins 1 & 2 closed | |
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16Kb ROM enabled |
JP2 |
pins 2 & 3 closed | |
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USER CONFIGURABLE SETTINGS | |||
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Function |
Location |
Setting | |
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Floppy drive port address is 3F2-3F7h |
JP7 |
closed | |
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Floppy drive port address is 372-377h |
JP7 |
open | |
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Cache enabled |
JP11 |
open | |
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Cache disabled |
JP11 |
closed | |
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4Kb buffer enabled |
JP12 |
open | |
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16Kb buffer enabled |
JP12 |
closed | |
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4Kb buffer size selected |
JP14, JP15, JP16 |
pins 1 & 2 closed | |
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16Kb buffer size selected |
JP14, JP15, JP15 |
pins 2 & 3 closed | |
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MISCELLANEOUS TECHNICAL NOTES |
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All other jumpers are for factory tests and configured as follows: JP4, JP5 - closed; JP6, JP8, JP13 - open; JP9, JP10 - pins 2 & 3 closed - do not alter. |