Intel 80C186XL, 80C188XL user manual Index-4, interrupt

INDEX

F

Fault exceptions, 2-43 FaxBack service, 1-4 F-Bus

and PCB, 4-5 operation, 4-5

Flags‚ See Processor Status Word (PSW) Floating Point, defined, 2-37

H

HALT bus cycle‚ See Bus cycles HOLD/HLDA protocol‚ See Bus hold protocol Hypertext manuals, obtaining from BBS, 1-5

I

I/O devices

interfacing with, 3-6–3-7 memory-mapped, 3-6

I/O ports addressing, 2-36

I/O space, 3-1–3-7 accessing, 3-6

reserved locations, 2-15, 6-17 Idle states

and bus cycles, 3-18 Immediate operands, 2-28 IMUL instruction, A-9

Inputs, asynchronous, synchronizing, B-1 INS instruction, A-2

In-Service register, 8-5, 8-7, 8-18, 8-19, 8-28 Instruction Pointer (IP), 2-1, 2-6, 2-13, 2-23, 2-39,

2-41 reset status, 2-6

Instruction prefetch bus cycle‚ See Bus cycles Instruction set, 2-17, A-1, D-1

additions, A-1

arithmetic instructions, 2-19–2-20, A-9

bit manipulation instructions, 2-21–2-22, A-9 data transfer instructions, 2-18–2-20, A-1,

A-8

data types, 2-37–2-38 enhancements, A-8 high-level instructions, A-2 nesting, A-2

processor control instructions, 2-27 program transfer instructions, 2-23–2-24 reentrant procedures, A-2

Index-4

rotate instructions, A-10 shift instructions, A-9

string instructions, 2-22–2-23, A-2 INT instruction, single-byte‚ See Breakpoint

interrupt

INT0 instruction, 2-44

INTA bus cycle‚ See Bus cycles Integer, defined, 2-37, 10-7 Interrupt Control register, 8-28 Interrupt Control registers, 8-12

for external pins, 8-14, 8-15 for internal sources, 8-13

Interrupt Control Unit (ICU), 8-1–8-31 block diagram, 8-2, 8-24 cascade mode, 8-7 initializing, 8-30, 8-31

interfacing with an 82C59A Programmable Interrupt Controller, 3-25–3-27

master mode, 8-1, 8-2–8-23 initializing, 8-30

operation in slave mode, 8-29 operation with nesting, 8-4 programming, 8-11, 8-25 registers, 8-11, 8-25

master mode, 8-11 slave mode, 8-1, 8-23–8-30 special fully nested mode, 8-8

with cascade mode, 8-8 without cascade mode, 8-8

typical interrupt sequence, 8-5 Interrupt Enable Flag (IF), 2-7, 2-9, 2-41 Interrupt Mask register, 8-16, 8-17, 8-28 Interrupt Request register, 8-16, 8-28 Interrupt Status register, 8-7, 8-22, 8-23, 8-28 Interrupt Vector register, 8-26, 8-27 Interrupt Vector Table, 2-39, 2-40 Interrupt-on-overflow trap (Type 4 exception),

2-44

Interrupts, 2-39–2-43

and CSU initialization, 6-6 controlling priority, 8-12 edge- and level-sensitive, 8-10

and external 8259As, 8-10 enabling cascade mode, 8-12 enabling special fully nested mode, 8-12 latency, 2-45

reducing, 3-28

latency and response times, 8-10, 8-11, 8-30