added waitvblank and fixed get_tv

2015-07-15 19:46:26 +02:00
parent c3d45e4c47
commit 1414411bba
5 changed files with 39 additions and 9 deletions
--- a/libsrc/pce/readme.txt
+++ b/libsrc/pce/readme.txt
@@ -8,9 +8,6 @@ joystick support should get verified on real hw

 revers() is a dummy function, actual reverse output is not supported yet

-waitvblank() is missing
-get_tv() is missing
-
 some graphical petscii chars should get added to the charset

 interruptor support in crt0 (and cfg) is missing
--- a/libsrc/pce/waitvblank.s
+++ b/libsrc/pce/waitvblank.s
@@ -0,0 +1,18 @@
+;
+; void waitvblank (void);
+;
+
+        .include "pce.inc"
+
+        .export         _waitvblank
+;;        .importzp       tickcount
+
+.proc   _waitvblank
+
+        lda tickcount
+@lp:    cmp tickcount
+        beq @lp
+        rts
+
+.endproc
+