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-- This module describes the semantics of machine commands.
module Commands where
import Prelude hiding (Word)
import Machine
import Utils
import Data.IORef
doNothing :: Emulator ()
doNothing = with pc $ \pc -> do
pcval <- readIORef pc
writeIORef pc (pcval + 2)
_doUnlink :: Int -> Emulator ()
_doUnlink a = do
addr <- readA a
val <- getLong addr
with pc $ \pc -> do
pcval <- readIORef pc
writeIORef pc (pcval + 2)
isSupervisor >>= \sup -> if sup
then with ssp $ \sp -> do
writeIORef sp (val + 4)
else with usp $ \sp -> do
writeIORef sp (val + 4)
doUnlink :: [Int] -> Emulator ()
doUnlink = _doUnlink . fromBits
doReset :: Emulator ()
doReset = return ()
doStop :: Emulator ()
doStop = return ()
doRTE :: Emulator ()
doRTE = return ()
doRTS :: Emulator ()
doRTS = return ()
doTrapV :: Emulator ()
doTrapV = return ()
doRTR :: Emulator ()
doRTR = return ()
doIllegal :: Emulator ()
doIllegal = return ()
_doTAS :: Int -> Int -> Emulator ()
_doTAS _ _ = return ()
doTAS :: [Int] -> [Int] -> Emulator ()
doTAS = args2 _doTAS
_doTST :: Int -> Int -> Int -> Emulator ()
_doTST _ _ _ = return ()
doTST :: [Int] -> [Int] -> [Int] -> Emulator ()
doTST = args3 _doTST
_doTrap :: Int -> Emulator ()
_doTrap _ = return ()
doTrap :: [Int] -> Emulator ()
doTrap = _doTrap . fromBits
_doLink :: Int -> Emulator ()
_doLink _ = return ()
doLink :: [Int] -> Emulator ()
doLink = _doLink . fromBits
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