FDC37B78X SMSC Corporation, FDC37B78X Datasheet - Page 22

• Manufacturer Part Number: FDC37B78X
• Description: Enhanced Super I/O Controller with ACPI Support/ Real Time Clock and Consumer IR
• Manufacturer: SMSC Corporation

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.
that drive automatically invokes tape support.
The TDR Tape Select bits TDR.[1:0] determine
Any future references to
TAPE SEL1
(TDR.1)
0
0
1
1
TABLE 7 - TAPE SELECT BITS
TAPE SEL0
(TDR.0)
22
0
1
0
1
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.
bits TDR.[7:2] are tristated when read. The TDR
is unaffected by a software reset.
SELECTED
DRIVE
The remaining Tape Drive Register
None
1
2
3