FDC37B787-NS SMSC, FDC37B787-NS Datasheet - Page 22

• Manufacturer Part Number: FDC37B787-NS
• Description: IC CTRLR SUPER I/O ENH 128-QFP
• Manufacturer: SMSC

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

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
The