Fix FLAGS bit handling by IO model

1 files changed, 4 insertions, 4 deletions

diff --git a/io/model.cpp b/io/model.cpp
index fb9f62b..79bc511 100644
--- a/io/model.cpp
+++ b/io/model.cpp
@@ -33,16 +33,16 @@ bool iomodel::interact(std::array<std::uint_fast32_t, NUM_CTLREGS> &ctlregs) {
     if (interrupt)
         ctlregs[FLAGS] |= FLAG_INT_REQUEST;
     else
-        ctlregs[FLAGS] &= !FLAG_INT_REQUEST;
+        ctlregs[FLAGS] &= ~FLAG_INT_REQUEST;
     interrupt = interrupt && (ctlregs[FLAGS] & FLAG_INT_ENABLE);
 
+    if (ctlregs[FLAGS] & FLAG_INT_ENABLE_DELAY)
+        ctlregs[FLAGS] |= FLAG_INT_ENABLE;
+
     if (interrupt) {
         ctlregs[FLAGS_SAVED] = ctlregs[FLAGS];
         ctlregs[FLAGS] = 0;
         ctlregs[HALTED] = 0;
-    } else {
-        if (ctlregs[FLAGS] & FLAG_INT_ENABLE_DELAY)
-            ctlregs[FLAGS] |= FLAG_INT_ENABLE;
     }
 
     return interrupt;