W83977AF Information Storage Devices, Inc, W83977AF Datasheet - Page 134

• Manufacturer Part Number: W83977AF
• Description: W83877TF Plus Kbc, Cir, RTC
• Manufacturer: Information Storage Devices, Inc

CR2D (Default 0x00)
CR2E (Default 0x00)
CR2F (Default 0x00)
10.2 Logical Device 0 (FDC)
CR30 (Default 0x01)
CR31
CR60, CR 61 (Default 0x03, 0xf0)
CR70 (Default 0x06)
Bit 5-4 : PIN119S1, PIN119S0
Bit 3-2 : PIN104S1, PIN104S0
Test Modes: Reserved for Winbond.
Test Modes: Reserved for Winbond.
Test Modes: Reserved for Winbond.
Bit 7-1 : Reserved.
Bit 0 : = 1 Activates the logical device.
Bit 7-2 : Reserved.
Bit 1 : ENRNGCK -- > Enable I/O Range check
Bit 0 : FORIORD --> Forces LDN to respond I/O read
These two registers select FDC I/O base address [0x100:0xFF8] on 8 byte boundaries.
Bit 7-4 : Reserved.
Bit 3-0 : These bits select IRQ resource for FDC.
Bit 1-0 : PIN103S1, PIN103S0
= 00 NDACK0
= 01 GP16
= 10 8042 P15
= 11 nRTSC
= 00 IRQ15
= 01 GP15
= 10 WDTO
= 11 IRSL2 [W83977AF only]
= 00 IRQ14
= 01 GP14
= 10 PLEDO
= 11 IRSL1 [W83977AF only]
= 0 Logical device is inactive.
- 122 -
W83977F/ W83977AF
Publication Release Date: March 1998
PRELIMINARY
Revision 0.58