LOAD/SAVE preparation routines should be OK now

c64/kernal/iostack/f49e.load_prep.s

@@ -0,0 +1,23 @@
+
+//
+// LOAD preparation routine
+//
+
+//
+// Input (according to http://sta.c64.org/cbm64krnfunc.html)
+// .A        - 0 for load, non-0 for verify
+// .X and .Y - load address (if secondary address is 0)
+//
+
+//
+// Note: Although the vector at $330 points to $F4A5, the Kernal jump table points to $F49E
+// (see also Mapping the C64, page 76). By experimenting I have discovered that $F49E performs
+// indirect jump via ($0330) vector, after setting MEMUSS.
+//
+
+
+LOAD_PREP:
+
+	sty MEMUSS+1
+	stx MEMUSS+0
+    jmp (ILOAD)