StupidOS/kernel/pic.s

[BITS 32]

PIC1_CMD	equ 0x20
PIC1_DATA	equ 0x21
PIC2_CMD	equ 0xA0
PIC2_DATA	equ 0xA1

section .text

global setup_pic
setup_pic:
	mov al, 0x11
	out PIC1_CMD, al
	out PIC2_CMD, al
	
	mov al, 0x20
	out PIC1_DATA, al
	mov al, 0x28
	out PIC2_DATA, al

	mov al, 4
	out PIC1_DATA, al
	mov al, 2
	out PIC2_DATA, al

	; mask all
	mov al, 0xFF
	out PIC1_DATA, al
	out PIC2_DATA, al
	ret

global pic_eoi
pic_eoi:
	mov al, 0x20
	out PIC2_CMD, al
	out PIC1_CMD, al
	ret