diff options
Diffstat (limited to 'src/Machine.hs')
| -rw-r--r-- | src/Machine.hs | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/src/Machine.hs b/src/Machine.hs index 91bcca0..a16127f 100644 --- a/src/Machine.hs +++ b/src/Machine.hs @@ -6,7 +6,7 @@ import qualified Data.Vector.Unboxed as V import qualified Data.Vector.Unboxed.Mutable as VM import Prelude hiding (Word) import Data.Word (Word32, Word16, Word8) -import Data.Bits (testBit, setBit, clearBit) +import Data.Bits (testBit, setBit, clearBit, (.&.), (.|.), shift) import Data.IORef import Control.Monad import Control.Monad.IO.Class (liftIO) @@ -191,6 +191,11 @@ incPC = with pc $ \pc -> do ------------------------------------------------------------------------------- -- Status Register Access +writeSR :: Word -> Emulator () +writeSR v = with sr $ \sr -> do + writeIORef sr v + +readSR :: Emulator Word readSR = with sr $ \sr -> do sr <- readIORef sr return sr @@ -247,7 +252,10 @@ setSupervisor b = with sr $ \sr -> do srval <- readIORef sr writeIORef sr $ (if b then setBit else clearBit) srval 13 --- setInterruptLevel :: Int -> Emulator () +setInterruptLevel :: Int -> Emulator () +setInterruptLevel v = do + srv <- readSR + writeSR $ srv .&. fromIntegral 0xF8FF .|. fromIntegral (shift v 16) setExtend :: Bool -> Emulator () setExtend b = with sr $ \sr -> do |