local address,serialnumber,
    driveproxy,rb,readBytes,loadFileTable,findFile = ...

Filetable = loadFileTable()

function loadfile(file)
    local fileIndex = findFile(file)
    assert(fileIndex, "file \""..file.."\" not found")

    local fileData = Filetable[fileIndex]
    assert(readBytes(fileData["offset"],9) == "STARTFILE",
        "magic does not match")

    local data = readBytes(fileData["offset"]+9,
        fileData["size"]*driveproxy.getSectorSize()-9)

    return load(data, "=" .. file, "bt", _G)
end

local compo = component
local compu = computer

_G.screen_x = 1
_G.screen_y = 1

-- init gpu
screen = compo.list("screen", true)()
gpu = screen and compo.list("gpu", true)()

if gpu then
        gpu = compo.proxy(gpu)
        _G.gpu = gpu
        if not gpu.getScreen() then
                gpu.bind(screen)
        end

        _G.boot_screen = gpu.getScreen()
        w, h = gpu.maxResolution()

        gpu.setResolution(w, h)
        gpu.setBackground(0x000000)
        gpu.setForeground(0xFFFFFF)
        gpu.fill(1, 1, w, h, " ")
end

function printk(msg,xOffset)
    if gpu then
		if xOffset==nil then
			xOffset=0
		end

        if _G._JOURNAL then
            _G.journal_add(msg)
        end
        gpu.set(1+xOffset, screen_y, msg)
        if screen_y == h then
            gpu.copy(1, 2, w, h - 1, 0, -1)
            gpu.fill(1, h, w, 1, " ")
        else
            screen_y = screen_y + 1
        end
    end
end

function waitsleep(time)
    local time_start = os.time()

    while true do
        if os.time() - time_start >= time then
            break
        end
    end
end

printk("set hcf")

function hcf()
    local ts = os.time()
    while 1 do
        if os.time() - ts >= 0.5 then
            coroutine.yield()
        end
    end
end

printk("OSloader v2.1")

-- start loading
printk("Setting important functions")

_G.osloader = {}

printk("set osloader.bootinvoke")

osloader.bootinvoke = function(a, m, ...)
    local r = table.pack(pcall(compu.invoke,a,m,...))
    if not r[1] then
        return nil, r[2]
    else
        return table.unpack(r, 2, r.n) 
    end
end

_G.BootAddress = address
printk(_G.BootAddress)

printk("loading boot flags")
local flagsfile, reason = loadfile("/flags.lua")

flagsfile()

printk("loading kernel at /kernel...")

local kernelfile, reason = loadfile("/kernel")

kernelfile()

hcf()