cpu 8086
	org 0x0000

	db 0x55, 0xAA
	db 0x00
	jmp near init

	times (0x18 - ($-$$)) db 0
	dw 0
	dw pnp

pnp:	db "$PnP"
	db 1 ; version 1
	db 2 ; 2 * 16 length
	dw 0 ; offset of next header
	db 0
	db 0 ; checksum (filled by fix-rom)
	dd 0 ; device identifier
	dw 0 ; manufacturer string
	dw name ; product name string
	db 0,0,0 ; device type string
	db 0x20 ; device indicator, bit for "read cacheable" set
	dw 0 ; boot connection vector
	dw 0 ; boot disconnect vector
	dw boot ; bootstrap entry point
	dw 0 ; reserved

	; zero for setting sreg without using reg
zero:	dw 0

name:	db "rdos", 0

init:	push ds

	; DS := 0
	mov ds, [cs:zero]
	; set entry points vectors
	mov word [0x19*4], boot
	mov word [0x19*4+2], cs

	pop ds
	retf

	; entry point on boot, preempting disks
	; this also doubles as entry point for reboot
boot:	xor ax, ax
	mov ss, ax
	mov sp, stack

	int 3

hlt:	hlt
	jmp hlt

	%include "kernel/intr.asm"

	align 512

absolute 0x400
	resb (0x501 - ($-$$))

	; copy of the first 32 interrupt vectors
ivt2:	resd 0x20

	; 8kb stack
	alignb 2
	resw 0x2000
stack: