New EEPROM

mainGPU = component.proxy(component.list("gpu")())
mainGPU.bind(component.list("screen")(), true)
eepData = component.invoke(component.list("eeprom")(), "getData") or ""
prefLoad = string.sub(eepData, 1, 36)
prefType = string.sub(eepData, 37, 37)
eepData = nil
readOnly = false
function readManaged(drive)
    mainDrive = drive
    drive = nil
    if mainDrive.isReadOnly() then
        readOnly = true
        return
    end
    local success, file = pcall(mainDrive.open, ".boot", "r")
    if not success then
        return
    end
    success = nil
    readOnly = nil
    local path = mainDrive.read(file, 2048)
    mainDrive.close(file)
    if not path then
        return
    end
    local success, file = pcall(mainDrive.open, path, "r")
    local exec = load(function() return mainDrive.read(file, 2048) end, "=managedBoot@/".. path)
    mainDrive.close(file)
    file, path = nil, nil
    if not exec then
        return
    end
    exec()
    computer.shutdown()
end
function readUnmanaged(drive)
    mainDrive = drive
    drive = nil
    if string.sub(mainDrive.readSector(1), 1, 7) ~= "TYKBOOT" then return end
    readOnly = nil
    local start = 1
    local atByte = 8
    while true do
        local temp = mainDrive.readByte(atByte)
        if temp == -128 then
            start = start / mainDrive.readByte(atByte-1)
            if start == 1 then
                start = 0
            end
            start = start + mainDrive.readByte(atByte-1)
            break
        end
        start = start * temp
        atByte = atByte + 1
    end
    atByte = 0
    local code = ""
    while true do
        local temp = mainDrive.readByte(start + atByte)
        if temp == 28 then
            break
        end
        atByte = atByte + 1
        code = code .. string.char(temp)
    end
    load(code, "=unmanagedBoot@"..start.."-"..(start+atByte))()
    computer.shutdown()
end
if prefType == "m" then
    local success, drive = pcall(component.proxy, prefLoad)
    prefLoad, prefType = nil, nil
    if success then
        readManaged(drive)
    end
elseif prefType == "u" then
    local success, drive = pcall(component.proxy, prefLoad)
    prefLoad, prefType = nil, nil
    if success then
        readUnmanaged(drive)
    end
end
prefLoad, prefType = nil, nil
list = component.list("filesystem")
while true do
    local success, drive = pcall(component.proxy, list())
    if not success then
        break
    end
    readManaged(drive)
end
list = component.list("drive")
while true do
    local success, drive = pcall(component.proxy, list())
    if not success then
        break
    end
    readUnmanaged(drive)
end
if readOnly then
    error("All mediums are readonly!", 0)
end
error("No Bootable Medium Found!", 0)