this register after power up is 00H. This register
holds the value for the auto power management,
and floppy boot drive.
CR07
This register can only be accessed in the
Configuration Mode and after the CSR has
been initialized to 07H. The default value of
Table 53 - CR07
BIT NO.
BIT NAME
DESCRIPTION
0,1
Floppy Boot
This bit is used to define the boot floppy.
0 = Drive A (default)
1 = Drive B
2
3
4
Reserved
Reserved
Read as 0.
Read as 0.
Parallel Port
Enable
This bit controls the AUTOPOWER DOWN feature of the
Parallel Port. The function is:
0 = Auto powerdown disabled (default)
1 = Auto powerdown enabled
This bit is reset to the default state by POR or a hardware reset.
5
6
7
UART 2 Enable This bit controls the AUTOPOWER DOWN feature of the
UART2. The function is:
0 = Auto powerdown disabled (default)
1 = Auto powerdown enabled
This bit is reset to the default state by POR or a hardware reset.
UART 1 Enable This bit controls the AUTOPOWER DOWN feature of the
UART1. The function is:
0 = Auto powerdown disabled (default)
1 = Auto powerdown enabled
This bit is reset to the default state by POR or a hardware reset.
Floppy Disk
Enable
This bit controls the AUTOPOWER DOWN feature of the Floppy
Disk. The function is:
0 = Auto powerdown disabled (default)
1 = Auto powerdown enabled
This bit is reset to the default state by POR or a hardware reset.
126
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