
INDEX
I-9
function,
4-22
hard drive wait states (table),
4-23
HDWS1 bit
function,
4-22
hard drive wait states (table),
4-23
high-speed clock ROM cycles,
2-15
High-Speed PLL mode
clock-switching logic,
1-16
–
1-17
logic flowchart (figure),
1-18
high-speed PLL frequency select (table),
4-63
PMU operating-mode transitions,
1-8
purpose and use,
1-4
–
1-5
shutting off with software,
1-5
High-Speed to Low-Speed Timer Register (Index 83h)
description,
4-44
state-transition timing,
1-22
hit-count limit bit logic (table),
4-51
HOTRST bit,
3-21
HSA16 bit,
4-50
HSA17 bit,
4-50
HSA18 bit,
4-50
HSA19 bit,
4-50
HSPLLFQ0 bit,
4-62
HSPLLFQ1 bit,
4-62
I
I/O Activity Address 0 Register (Index 8Ch)
description,
4-46
PMU operating-mode transitions,
1-8
I/O Activity Address 1 Register (Index 8Dh)
description,
4-46
PMU operating-mode transitions,
1-8
I/O drive type description (table),
4-69
I/O Timeout Register (Index 40h)
bit descriptions,
4-12
powered-down device SMIs,
1-31
I/O Wait State Register (Index 61h)
bit descriptions,
4-22
floppy disk drive wait states (table),
4-22
general bus I/O wait states (table),
4-23
hard drive wait states (table),
4-23
ID0 bit,
3-12
ID1 bit,
3-12
inactivity states and transition intervals (table),
1-10
INIT bit
Parallel Control Port (Ports 27Ah & 37Ah),
3-10
Parallel Control Port (Ports 27Ah, 37Ah & 37Eh),
3-9
INT bit
Activity Mask 1 Register (Index 75h),
4-40
Activity Status 1 Register (Index A0h),
4-53
interrupt registers
Interrupt Controller 1 I/O addresses (table),
3-4
Interrupt Controller 2 I/O addresses (table),
3-4
Interrupt Enable Register (Ports 2F9h & 3F9h),
3-12
Interrupt Identification Register (Ports 2FAh & 3FAh)
bit descriptions,
3-12
interrupt ID bit logic (table),
3-13
interrupt redirect logic (table),
4-65
PIRQ Configuration Register (Index B2h),
4-64
interrupts
enabling and specifying mapping (table),
4-6
INTIOWAIT bit,
4-25
IOCD0 bit,
4-20
IOCD1 bit,
4-20
IOCHCK bit,
3-20
IOR bit,
4-14
IORESET pin,
1-40
IOW bit,
4-14
IOWS0 bit
function,
4-22
general bus I/O wait states (table),
4-23
IOWS1 bit
function,
4-22
general bus I/O wait states (table),
4-23
IP bit,
3-12
IRQ pins as wake-up signals,
1-24
IRQ0SMI bit,
4-14
IRQ0SMIEN bit,
4-60
IRQ1 signal (table),
1-23
IRQ14 bit,
1-29
IRQ3 bit,
4-12