w83977eg Winbond Electronics Corp America, w83977eg Datasheet - Page 93

• Manufacturer Part Number: w83977eg
• Description: Winbond Isa I/o W83977ef W83977eg
• Manufacturer: Winbond Electronics Corp America

CRF1 (Default 0x00)
Bit 1: FDC DMA Mode
Bit 0: Floppy Mode
Bit 7 - 6: Boot Floppy
Bit 5, 4: Media ID1, Media ID0. These bits will be reflected on FDC's Tape Drive Register bit 7, 6.
Bit 3 - 2: Density Select
Bit 1: DISFDDWR
Bit 0: SWWP
= 10 (Reserved)
= 01 PS/2
= 00 Model 30
= 0 Burst Mode is enabled
= 1 Non-Burst Mode (Default)
= 0 Normal Floppy Mode (Default)
= 1 Enhanced 3-mode FDD
= 00 FDD A
= 01 FDD B
= 10 FDD C
= 11 FDD D
= 00 Normal (Default)
= 01 Normal
= 10 1 ( Forced to logic 1)
= 11 0 ( Forced to logic 0)
= 0 Enable FDD write.
= 1 Disable FDD write(forces pins WE, WD stay high).
= 0 Normal, use WP to determine whether the FDD is write protected or not.
= 1 FDD is always write-protected.
W83977EF-AW/W83977EG-AW
-91-
Publication Release Date: Apr. 2006
Revision 1.2