82374EB datasheet(9/208 Pages) INTEL

9 / 208 page

CONTENTS

PAGE

722 EISA MASTER PREEMPTION

146

723 DMA PREEMPTION

146

73 Slave Timeouts

146

74 Arbitration During Non-Maskable Interrupts

146

80 INTERVAL TIMERS

146

81 Interval Timer Address Map

147

82 Programming The Interval Timer

148

90 INTERRUPT CONTROLLER

151

91 Interrupt Controller Internal Registers

153

92 Interrupt Sequence

153

93 80x86 Mode

154

931 ESC INTERRUPT ACKNOWLEDGE CYCLE

154

94 Programming The Interrupt Controller

155

95 End-Of-Interrupt Operation

158

951 END OF INTERRUPT (EOI)

158

952 AUTOMATIC END OF INTERRUPT (AEOI) MODE

159

96 Modes Of Operation

159

961 FULLY NESTED MODE

159

962 THE SPECIAL FULLY NESTED MODE

160

963 AUTOMATIC ROTATION (EQUAL PRIORITY DEVICES)

160

964 SPECIFIC ROTATION (SPECIFIC PRIORITY)

161

965 POLL COMMAND

161

966 CASCADE MODE

161

967 EDGE AND LEVEL TRIGGERED MODES

162

97 Register Functionality

162

971 INITIALIZATION COMMAND WORDS

162

972 OPERATION CONTROL WORDS (OCWS)

163

98 Interrupt Masks

163

981 MASKING ON AN INDIVIDUAL INTERRUPT REQUEST BASIS

163

982 SPECIAL MASK MODE

163

99 Reading The Interrupt Controller Status

163

910 Non-Maskable Interrupt (NMI)

164

100 ADVANCED PROGRAMMABLE INTERRUPT CONTROLLER (APIC)

166

101 Physical Characteristics Of APIC Bus

168

102 Arbitration For APIC Bus

168

103 Bus Message Formats

169

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