W83697HF/F
Bit 3 - 2 : Density Select
= 00 Normal (Default)
= 01 Normal
= 10 1 ( Forced to logic 1)
= 11 0 ( Forced to logic 0)
: DISFDDWR
Bit 1
= 0 Enable FDD write.
= 1 Disable FDD write(forces pins WE, WD stay high).
SWWP
Bit 0:
= 0 Normal, use WP to determine whether the FDD is write protected or not.
= 1 FDD is always write-protected.
CRF2 (Default 0xFF)
Bit 7 - 6 : FDD D Drive Type
Bit 5 - 4 : FDD C Drive Type
Bit 3 - 2 : FDD B Drive Type
Bit 1 - 0 : FDD A Drive Type
CRF4 (Default 0x00)
FDD0 Selection:
Bit 7:
Bit 6
Reserved.
: Pre-comp Disable.
= 1 Disable FDC Pre-compensation.
= 0 Enable FDC Pre-compensation.
: Reserved.
Bit 5
Bit 4 - 3 : DRTS1, DRTS0: Data Rate Table select (Refer to TABLE A).
= 00 Select Regular drives and 2.88 format
= 01 3-mode drive
= 10 2 Meg Tape
= 11 Reserved
Bit 2
: Reserved.
Bit 1:0 : DTYPE0, DTYPE1: Drive Type select (Refer to TABLE B).
CRF5 (Default 0x00)
FDD1 Selection: Same as FDD0 of CRF4.
Publication Release Date: Feb. 2002
Revision 0.70
- 142 -
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