FDC37C669_07 SMSC [SMSC Corporation], FDC37C669_07 Datasheet - Page 123

• Manufacturer Part Number: FDC37C669_07
• Description: PC 98/99 Compliant Super I/O Floppy Disk Controller with Infrared Support
• Manufacturer: SMSC [SMSC Corporation]

CR03
This
the Configuration Mode and the CSR has been
BIT NO.
7,2
register
0
1
3
4
5
6
PWRGD/
GAMECS
Enhanced Floppy
Mode 2
Reserved
DRVDEN1
MFM
IDENT
ADRx/
DRV2 EN/
IRQ_B
can
BIT NAME
only be accessed in
Bit 0
0
1
Bit 1
0
1
Reserved - Read as zero
Bit
4
0
1
IDENT is used in conjunction with MFM to define the
interface mode of operation
Bit - 7
0
1
1
Table 50 - CR03
IDENT
1
1
0
0
123
Pin function
PWRGD (default)
GAMECS
Pin DRVDEN1 output
DRVDEN 1 output
DRVDEN 1 high (default)
Bit - 2
x
0
1
initialized to 03H. The default value after power
up is 780H.
Floppy Mode - Refer to the description of the
TAPE DRIVE REGISTER (TDR) for more
information on these modes.
NORMAL Floppy Mode (Default)
Enhanced Floppy Mode 2 (OS2)
MFM
Pin 94
DRV2 (input)
ADRX
IRQ_B
1
0
1
0
DESCRIPTION
MODE
AT Mode (Default)
Reserved
PS/2
Model 30