; This is the first stage of the boot loader. This file's compiled binary is
; meant to be burned to the first sector of the boot disk. Do not do ANYTHING
; else to it, or otherwise, you will completely break the system.
JMP WORD BEGIN
NOP

; BIOS Parameter Block
BPBOEM      DB "MY-OS   "
BPBBPS      DW 512
BPBSPC      DB 1
BPBRSE      DW 1
BPBFATS     DB 2
BPBNIRS     DW 224
BPBTLS      DW 2000
BPBMDT      DB 240
BPBSPFAT    DW 9
BPBSPT      DW 18
BPBHOS      DW 2
BPBHS       DD 0
BPBLASOM    DD 0
; Extended BIOS Parameter Block
EXBPBDN     DB 0
EXBPBFLAGS  DB 0
EXBPBSIGN   DB 29h
EXBPBVOLID  DD 0
EXBPBVOL    DB "MY-OS      "
EXBPBFILESYS    DB "FAT12   "

BEGIN:
    MOV AX, 31744
    CLI
    MOV SS, AX
    MOV SP, 2048
    STI
    MOV DS, AX
    MOV ES, AX
    MOV FS, AX
    MOV GS, AX


    HLT
    JMP $

; Set emptry bytes to null
TIMES 01FEh - ($ - $$) DB 00h
; Boot sector 'signature'
DB 85
DB 170