Created a target and a library for the Commander X16 prototype computer.

2019-09-27 03:38:51 -04:00
parent 0896deedef
commit 18afc7c703
49 changed files with 2440 additions and 59 deletions
--- a/libsrc/cx16/waitvsync.s
+++ b/libsrc/cx16/waitvsync.s
@@ -0,0 +1,17 @@
+;
+; 2019-09-26, Greg King
+;
+; void waitvsync (void);
+;
+; VERA's vertical sync. causes IRQs which increment the jiffy clock.
+;
+
+        .export         _waitvsync
+
+        .include        "cx16.inc"
+
+_waitvsync:
+        lda     TIME + 2
+:       cmp     TIME + 2
+        beq     :-              ; Wait for next jiffy
+        rts