Intel 460GX - Serial Input Byte Pointer; General Purpose Output; Hot-Plug Non-Interrupt Inputs; Hot-Plug Slot Identifier

Intel® 460GX Chipset Software Developer’s Manual 8-17
WXB Hot-Plug
8.2.8 Serial Input Byte Pointer
Address Offset: 11h Size: 16 bits
Default Value: 00h Attribute: Read/Write, Read-Only
Used to input a byte into the IHPC input registers. The byte number is written to the pointer. After
the Serial Input Busy Status is read as a logic zero, the requested byte will be in the Serial Input
Data Register. The contents will be a copy of the corresponding byte in the Interrupting Input and
Clear Register (least significant) or Non-Interrupting Inputs Register (most significant).
Bits
Description
7 Serial Input Busy Status: RO
6:4 reserved (0)
3:0 Serial Input Byte Pointer. RW
8.2.9 General Purpose Output
Address Offset: 13h Size: 8 bits
Default Value: 00h Attribute: Read/Write (Pwr Good Rst Only)
These bits are only driven out following SOGO/LED cycles.
Bits
Description
7:6 reserved (0)
5:0 General Purpose Output bits (one bit per supported slot). Slot F is MSB. Slot A is LSB.
8.2.10 Hot-Plug Non-interrupt Inputs
Address Offset: 14h Size: 32 bits
Default Value: Attribute: Read Only
Bits
Description
31:6 reserved (0)
5 Slot F M66EN, PCI 66 MHz Clock Enable
4 Slot E M66EN, PCI 66 MHz Clock Enable
3 Slot D M66EN, PCI 66 MHz Clock Enable
2 Slot C M66EN, PCI 66 MHz Clock Enable
1 Slot B M66EN, PCI 66 MHz Clock Enable
0 Slot A M66EN, PCI 66 MHz Clock Enable
8.2.11 Hot-Plug Slot Identifier
Address Offset: 28h Size: 16 bits
Default Value: 0000h Attribute: Read/Write
This register is a copy of Configuration Register 40h, byte 0.