W83627HF/ F/ HG/ G
CRF0 (Default 0x0E)
FDD Mode Register
BIT
DESCRIPTION
7
FIPURDWN
This bit controls the internal pull-up resistors of the FDC input pins RDATA, INDEX,
TRAK0, DSKCHG, and WP.
0: The internal pull-up resistors of FDC are turned on.(Default)
1: The internal pull-up resistors of FDC are turned off.
6
INTVERTZ
This bit determines the polarity of all FDD interface signals.
0: FDD interface signals are active low.
1: FDD interface signals are active high.
DRV2EN (PS2 mode only)
5
4
When this bit is a logic 0, indicates a second drive is installed and is reflected in status
register A.
Swap Drive 0, 1 Mode
0: No Swap (Default)
1: Drive and Motor sel 0 and 1 are swapped.
3 - 2 Interface Mode
11: AT Mode (Default)
10: Reserved
01: PS/2
00: Model 30
1
0
FDC DMA Mode
0: Burst Mode is enabled
1: Non-Burst Mode (Default)
Floppy Mode
0: Normal Floppy Mode (Default)
1: Enhanced 3-mode FDD
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