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BOOT0SEG equ 0x07C0
BOOT0OFF equ 0x0000
BOOT1SEG equ 0x0100
BOOT1OFF equ 0x0000
KERNSEG equ 0x1000
KERNOFF equ 0x0000
VIDEOSEG equ 0xB800
; 8259A PIC initialization codes.
; Source: Linux bootsect.S, and Intel 8259A datasheet
; The most important reason why we reprogram the PICs is to
; route the hardware interrupts through vectors *above*
; those reserved by Intel. The BIOS (for historical reasons :-)
; routes them such that they conflict with internal processor-generated
; interrupts.
ICW1 equ 0x11 ; ICW1 - ICW4 needed, cascade mode, interval=8,
; edge triggered. (I think interval is irrelevant
; for x86.)
ICW2_MASTER equ 0x20 ; put IRQs 0-7 at 0x20 (above Intel reserved ints)
ICW2_SLAVE equ 0x28 ; put IRQs 8-15 at 0x28
ICW3_MASTER equ 0x04 ; IR2 connected to slave
ICW3_SLAVE equ 0x02 ; slave has id 2
ICW4 equ 0x01 ; 8086 mode, no auto-EOI, non-buffered mode,
; not special fully nested mode
KERN_THREAD_OBJ equ (1024*1024)
KERN_STACK equ KERN_THREAD_OBJ + 4096
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