FDC37B787-NS SMSC, FDC37B787-NS Datasheet - Page 22
FDC37B787-NS
Manufacturer Part Number
FDC37B787-NS
Description
IC CTRLR SUPER I/O ENH 128-QFP
Manufacturer
SMSC
Datasheet
1.FDC37B787-NS.pdf
(249 pages)
Specifications of FDC37B787-NS
Controller Type
I/O Controller
Interface
ISA Host
Voltage - Supply
4.5 V ~ 5.5 V
Current - Supply
70mA
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
128-QFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
638-1006
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TAPE DRIVE REGISTER (TDR)
Address 3F3 READ/WRITE
The Tape Drive Register (TDR) is included for
82077 software compatibility and allows the user
to assign tape support to a particular drive during
initialization. Any future references to that drive
automatically invokes tape support. The TDR
TAPE SEL1
(TDR.1)
0
0
1
1
TABLE 7 - TAPE SELECT BITS
TAPE SEL0
(TDR.0)
22
0
1
0
1
Tape Select bits TDR.[1:0] determine the tape
drive number. TABLE 7 illustrates the Tape Select
Bit encoding. Note that drive 0 is the boot device
and cannot be assigned tape support.
remaining Tape Drive Register bits TDR.[7:2] are
tristated when read. The TDR is unaffected by a
software reset.
SELECTED
DRIVE
None
1
2
3
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