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BT-545S
Data bus: | 16-bit, ISA |
Size: | Three/quarter-length, full-height card |
Hard drive supported: | Up to seven SCSI drives |
Floppy drives supported: | Two 360KB, 720KB, 1.2MB or 1.44MB drives |
CONNECTIONS | |
---|---|
Function | Location |
4-pin connector - Drive Active LED | J1 |
34-pin cable connector - floppy drive | J2 |
50-pin SCSI connector - internal | J3 |
50-pin SCSI connector - external | J4 |
SCSI ADDRESS | |||
---|---|---|---|
Address | SB1/switch 1 | SB1/switch 2 | SB1/switch 3 |
0 | off | off | off |
1 | off | off | on |
2 | off | on | off |
3 | off | on | on |
4 | on | off | off |
5 | on | off | on |
6 | on | on | off |
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on | on | on |
DMA CHANNEL | ||
---|---|---|
DRQ | SB1/switch 7 | SB1/switch 8 |
Disabled | off | off |
DRQ7 | on | off |
DRQ6 | off | on |
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on | on |
I/O PORT ADDRESS | |||
---|---|---|---|
Address | SB2/switch 1 | SB2/switch 2 | SB2/switch 3 |
Reserved | off | off | off |
134-137h | off | off | on |
234-237h | off | on | off |
334-337h | off | on | on |
Reserved | on | off | off |
130-133h | on | off | on |
230-233h | on | on | off |
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on | on | on |
BIOS ADDRESS | ||
---|---|---|
Address | SB2/switch 4 | SB2/switch 5 |
C800h | off | off |
Disabled | on | off |
D800h | off | on |
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on | on |
INTERRUPT REQUEST | |||
---|---|---|---|
IRQ | SB2/switch 6 | SB2/switch 7 | SB2/switch 8 |
Reserved | off | off | off |
Reserved | off | off | on |
IRQ15 | off | on | off |
IRQ14 | off | on | on |
IRQ12 | on | off | off |
IRQ9 | on | off | on |
IRQ10 | on | on | off |
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on | on | on |
Jumpers W3-W8 must be set in accordance with SB2/switches 6-8 |
USER CONFIGURABLE SETTINGS | ||
---|---|---|
Function | Location | Setting |
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SB1/switch 4 | on |
SCSI parity check disabled | SB1/switch 4 | off |
>1GB drive support disabled | SB1/switch 5 | on |
>1GB drive support enabled* | SB1/switch 5 | off |
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SB1/switch 6 | on |
Sync Negotiation initiated by BT-545S enabled | SB1/switch 6 | off |
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W2 | open |
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W9 | open |
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W14 | open |
Floppy drive port address is 370-377h | W14 | closed |
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W15 & W16 | closed |
Floppy drive disabled | W15 & W16 | open |
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W17 | Pins 1-2 closed |
IOCHRDY disabled | W17 | Pins 2-3 closed |
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W18 | closed |
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W19 | closed |
Sync transfer rate is 10MB/sec | W19 | open |
Note: The SCO UNIX device driver does not support drives greater than 1GB. |
DMA TRANSFER RATE | ||
---|---|---|
Speed | W11 | W13 |
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open | open |
5.7MB/sec | open | closed |
6.7MB/sec | closed | open |
8.0MB/sec | closed | closed |
INTERRUPT REQUEST | ||||||
---|---|---|---|---|---|---|
IRQ | W3 | W4 | W5 | W6 | W7 | W8 |
IRQ15 | closed | open | open | open | open | open |
IRQ14 | open | closed | open | open | open | open |
IRQ12 | open | open | closed | open | open | open |
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open | open | open | closed | open | open |
IRQ10 | open | open | open | open | closed | open |
IRQ9 | open | open | open | open | open | closed |
SB2/switches 6-8 must be set in accordance with jumpers W3-W8 |
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