26 lines
935 B
Plaintext
26 lines
935 B
Plaintext
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PIC1 equ 0x20 ; IO base for master PIC
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PIC2 equ 0xA0 ; IO base for slave PIC
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PIC1_COMMAND equ PIC1 ; Port for Command for master PIC
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PIC1_DATA equ (PIC1+1) ; Port for Data for master PIC
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PIC2_COMMAND equ PIC2 ; Port for Command for slave PIC
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PIC2_DATA equ (PIC2+1) ; Port for Data for slave PIC
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PIC_CMD_EOI equ 0x20 ; End-Of-Interrupt command
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ICW1_ICW4 equ 0x01 ; ICW4 (not) needed
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ICW1_SINGLE equ 0x02 ; Single (cascade) mode
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ICW1_INTERVAL4 equ 0x04 ; Call address interval 4 (8)
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ICW1_LEVEL equ 0x08 ; Level triggered (edge) mode
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ICW1_INIT equ 0x10 ; Initialization - required!
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ICW4_8086 equ 0x01 ; 8086/88 (MCS-80/85) mode
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ICW4_AUTO equ 0x02 ; Auto (normal) EOI
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ICW4_BUF_SLAVE equ 0x08 ; Buffered mode/slave
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ICW4_BUF_MASTER equ 0x0C ; Buffered mode/master
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ICW4_SFNM equ 0x10 ; Special fully nested (not)
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