add a return -1 helper

2024-01-11 18:19:13 +01:00
parent 57e65a6bf6
commit 5d49fde788
8 changed files with 28 additions and 39 deletions
--- a/libsrc/runtime/returnFFFF.s
+++ b/libsrc/runtime/returnFFFF.s
@@ -0,0 +1,15 @@
+;
+; Ullrich von Bassewitz, 25.10.2000
+;
+; CC65 runtime: Return -1 in a/x
+;
+
+        .export         returnFFFF
+
+.proc   returnFFFF
+
+        lda     #$FF
+        tax
+        rts
+
+.endproc