W83627DHG-PT Nuvoton Technology Corporation of America, W83627DHG-PT Datasheet - Page 153

• Manufacturer Part Number: W83627DHG-PT
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of W83627DHG-PT

• Pin Count: 128
• Lead Free Status / RoHS Status: Compliant

11.2.4 Tape Drive Register (TD Register) (Read base address + 3)
This register is used to assign a particular drive number to the tape drive support mode of the data
separator. This register also holds the media ID, drive type, and floppy boot drive information for the
floppy disk drive.
In normal floppy mode, this register only has bits 0 and 1, and the bit definitions are as follows:
If the three-mode FDD function is enabled (EN3MODE = 1 in LD0 CRF0, Bit 0), the bit definitions are
as follows:
DEFAULT
DEFAULT
BIT
7-2
BIT
NAME
NAME
1
0
7
6
5
4
3
2
1
0
BIT
BIT
TAPE SEL 1
RESERVED.
TAPE SEL 1.
TAPE SEL 0.
MEDIA ID1.
MEDIA ID0.
DRIVE TYPE ID1.
DRIVE TYPE ID0.
FLOPPY BOOT DRIVE 1.
FLOPPY BOOT DRIVE 0.
TAPE SEL 1.
TAPE SEL 0.
0
0
MEDIA
NA
ID1
7
7
0
MEDIA
NA
ID0
6
6
0
TYPE ID1
TAPE SEL 0
DRIVE
NA
5
5
1
RESERVED
W83627DHG-P/W83627DHG-PT
0
1
TYPE ID0
DESCRIPTION
DESCRIPTION
DRIVE
-143-
NA
4
4
1
These two bits are read-only. These two
bits reflect the value of LD0, CR [F1h], bits
5 and 4.
These two bits reflect two of the bits in LD0,
CR [F2h]. Which two bits are reflected
depends on the last drive selection in the
DO register.
These two bits reflect the value of LD0, CR
[F1h], bits 7 and 8.
These two bits assign a logical drive
number to the tape drive. Drive 0 is not
available as a tape drive and is reserved for
the floppy disk boot drive.
FLOPPY
DRIVE 1
BOOT
NA
3
3
0
Publication Release Date: July 09, 2009
FLOPPY
DRIVE SELECTED
DRIVE 0
BOOT
NA
2
2
0
None
1
TAPE
SEL 1
TAPE
SEL1
1
0
1
0
Version 1.94
SEL 0
TAPE
TAPE
SEL0
0
0
0
0