boot.lua: polyfill computer.{get,set}BootAddress

boot.lua

@@ -34,6 +34,16 @@ else
 	bootfs = data
 end
 
+--polyfill {get,set}BootAddress like normal bios does
+--they should exist! <https://github.com/MightyPirates/OpenComputers/blob/871e3c83d36c428c8652e0527eb19c217bb072d2/src/main/resources/assets/opencomputers/lua/machine.lua#L1381-L1384>
+--normal lua bios says it provides {get,set}BootAddress for "backwards compatibility", but there's no replacement
+function computer.getBootAddress()
+	return ci(eeprom, 'getData')
+end
+function computer.setBootAddress(addr)
+	return ci(eeprom, 'setData', addr)
+end
+
 local fd, err = ci(bootfs, 'open', '/init.lua')
 if not fd then bail('open %s/init.lua failed: %s', bootfs:sub(1, 8), err) end
 local code = ''