Merge pull request #453 from mrdudz/waitvsync

waitvblank for cbm targets
2017-07-18 15:38:27 +02:00
parent f5615c6ed4 b6d3d32e88
commit 6002e59c28
19 changed files with 142 additions and 26 deletions
--- a/libsrc/c128/waitvsync.s
+++ b/libsrc/c128/waitvsync.s
@@ -0,0 +1,30 @@
+;
+; Written by Groepaz <groepaz@gmx.net>
+;
+; void waitvsync (void);
+;
+
+        .export         _waitvsync
+
+        .include        "c128.inc"
+
+_waitvsync:
+
+        bit     MODE
+        bmi     @c80
+
+@l1:
+        bit     VIC_CTRL1
+        bpl     @l1
+@l2:
+        bit     VIC_CTRL1
+        bmi     @l2
+        rts
+
+@c80:
+        ;FIXME: do we have to switch banks?
+@l3:
+        lda     VDC_INDEX
+        and     #$20
+        beq     @l3
+        rts