CR03
This
register
can
only be accessed in the
initialized to 03H. The default value after power up is
780H.
Configuration Mode and the CSR has been
Table 50 - CR03
BIT NO.
BIT NAME
PWRGD/
GAMECS
DESCRIPTION
0
Bit 0 Pin function
0
1
PWRGD (default)
GAMECS
1
Enhanced Floppy Mode Bit 1
2
Floppy Mode - Refer to the description of the
TAPE DRIVE REGISTER (TDR) for more
information on these modes.
0
1
NORMAL Floppy Mode (Default)
Enhanced Floppy Mode 2 (OS2)
3
4
Reserved
Reserved - Read as zero
DRVDEN1
Bit
4
Pin DRVDEN1 output
DRVDEN 1 output
0
1
DRVDEN 1 high (default)
5
6
MFM
IDENT is used in conjunction with MFM to define the interface
mode of operation
IDENT
IDENT
MFM
MODE
1
1
0
0
1
0
1
0
AT Mode (Default)
Reserved
PS/2
Model 30
7,2
ADRx/
Bit - 7 Bit - 2 Pin 94
DRV2 EN/
IRQ_B
0
1
1
x
0
1
DRV2 (input)
ADRX
IRQ_B
122
SMSC [ SMSC CORPORATION ]
