Intel 460GX 8.2.9General Purpose Output, 8.2.11Hot-PlugSlot Identifier, 8.2.8Serial Input Byte Pointer, 8.2.10Hot-Plug Non-interruptInputs

WXB Hot-Plug

8.2.8Serial 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

7Serial Input Busy Status: RO

6:4 reserved (0)

3:0 Serial Input Byte Pointer. RW

8.2.9General 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.

8.2.10Hot-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

8.2.11Hot-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.

Intel® 460GX Chipset Software Developer’s Manual 8-17