TempleOSCD_140715.ISO

Demo/Lectures/NegDisp.CPP

@@ -0,0 +1,56 @@
+class Person
+{
+  U8 first    [32];
+  U8 last     [32];
+  U8 address1 [64];
+  U8 address2 [64];
+  U8 city     [32];
+  U8 state_zip[32];
+};
+
+U0 OffsetDemo1()
+{
+  Person *p=MAlloc(sizeof(Person));
+  StrCpy(p->first,    "Terry");
+  StrCpy(p->last,     "Davis");
+  StrCpy(p->address1, "8144 Sickle Lane");
+  StrCpy(p->address2, "");
+  StrCpy(p->city,     "Las Vegas");
+  StrCpy(p->state_zip,"NV 89128");
+}
+
+U(&OffsetDemo1,34);
+PressAKey;
+
+/*
+
+x86 has signed 8-bit  displacements
+    and signed 32-bit displacements.
+
+This example uses 8-bit negative displacements.
+
+*/
+
+class Person
+{ $$=-128;
+  U8 first    [32];
+  U8 last     [32];
+  U8 address1 [64];
+  U8 address2 [64];
+  U8 city     [32];
+  U8 state_zip[32];
+};
+
+U0 OffsetDemo2()
+{
+  Person *p=MAlloc(sizeof(Person))(I64)+128;
+  StrCpy(p->first,    "Terry");
+  StrCpy(p->last,     "Davis");
+  StrCpy(p->address1, "8144 Sickle Lane");
+  StrCpy(p->address2, "");
+  StrCpy(p->city,     "Las Vegas");
+  StrCpy(p->state_zip,"NV 89128");
+}
+
+U(&OffsetDemo2,34);
+PressAKey;