ALPHA DESIGN
WINCHESTER/FLOPPY DISK CONTROLLER
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Data bus: |
16-bit ISA |
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Size: |
Three-quarter length, Full-height card |
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Hard drive supported: |
Two ST506/412 drives |
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Floppy drives supported: |
360KB, 720KB, 1.2MB, 1.44MB |
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CONNECTIONS | |
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Function |
Location |
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4-pin connector - drive active LED |
J1 |
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20-pin data cable connector - drive 1 |
J2 |
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20-pin data cable connector - drive 0 |
J3 |
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34-pin control cable connector - hard drive |
J4 |
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34-pin control cable connector - floppy drive |
J5 |
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USER CONFIGURABLE SETTINGS | |||
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Function |
Location |
Setting | |
| » |
Primary address select |
JP1 |
pins 2 & 3, 5 & 6 closed |
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Alternate address select |
JP1 |
pins 1 & 2, 4 & 5 closed | |
| » |
Precompensation is 125ns |
J6 |
open |
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Precompensation is 187ns |
J6 |
closed | |
| » |
Single speed floppy drive select |
J7 |
open |
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Dual speed floppy drive select |
J7 |
closed | |