50 lines
1.2 KiB
Lua
50 lines
1.2 KiB
Lua
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local AWEFS_version = "01"
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local drive = component.list("drive", true)()
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local eeprom = component.list("eeprom")()
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component.invoke(eeprom, "setData", drive)
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drive = component.proxy(drive)
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local function readBytes(driveProxy,offset, count)
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local buffer = ""
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for i = 1, count do
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local byte = math.abs(driveProxy.readByte(offset))
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buffer = buffer .. utf8.char(byte)
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offset = offset + 1
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end
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return buffer
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end
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local function tryLoad(driveProxy)
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local signature = readBytes(driveProxy,1,8)
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if signature ~= "AWEFS " then
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return false, nil, "mismatched signature"
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end
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local version = readBytes(driveProxy,9,2)
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if version ~= AWEFS_version then
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return false, nil, "mismatched version"
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end
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local bootSec = readBytes(driveProxy,65,959)
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local sn = readBytes(driveProxy,11,8)
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bootSec = bootSec:gsub("%\0","")
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local init, err = load(
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bootSec, string.format("=%s",sn), "bt", _G)
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return true,init,err,sn
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end
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local success,init,err, sn = tryLoad(drive)
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if not success then
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error(err)
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end
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if not init then
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error("no bootable medium found :( " .. err)
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end
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return init(drive.address,sn,drive,readBytes)
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