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W83977EF-AW Datasheet(PDF) 93 Page - Winbond |
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W83977EF-AW Datasheet(HTML) 93 Page - Winbond |
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93 / 142 page  W83977EF-AW/W83977EG-AW Publication Release Date: Apr. 2006 -91- Revision 1.2 = 10 (Reserved) = 01 PS/2 = 00 Model 30 Bit 1: FDC DMA Mode = 0 Burst Mode is enabled = 1 Non-Burst Mode (Default) Bit 0: Floppy Mode = 0 Normal Floppy Mode (Default) = 1 Enhanced 3-mode FDD CRF1 (Default 0x00) Bit 7 - 6: Boot Floppy = 00 FDD A = 01 FDD B = 10 FDD C = 11 FDD D 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 = 00 Normal (Default) = 01 Normal = 10 1 ( Forced to logic 1) = 11 0 ( Forced to logic 0) Bit 1: DISFDDWR = 0 Enable FDD write. = 1 Disable FDD write(forces pins WE, WD stay high). Bit 0: SWWP = 0 Normal, use WP to determine whether the FDD is write protected or not. = 1 FDD is always write-protected. |
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