Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!tut.cis.ohio-state.edu!ucbvax!pro-tcc.cts.com!jerryk
From: jerryk@pro-tcc.cts.com (Jerry E. Kindall)
Newsgroups: comp.sys.apple
Subject: Re: Need help with P8 GET_TIME, protecting hires screen
Message-ID: <3388.feeds.info-apple@pro-tcc>
Date: 8 Dec 89 16:43:58 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 22

In-Reply-To: message from mackay@iisat.uucp

A better way to get the time (other than issuing a dummy open and close eveey
(every) few seconds) would just be to use FLUSH, as in PRINT CHR$(4);"FLUSH"
followed by the PEEKs to read the time.  This was suggested in an issue of
A2-Central or Open-Apple a while back.

If your hi-res screen is being trashed, it may be because of the file being
opened on the RAM disk, IF you're using double hi-res graphics.  If you're
not, and are using just single hi-res, the trouble is probably in the clock
driver itself.

The $BF06 vector cannot be called from BASIC.  It points to a routine within
ProDOS's language card (bank switched memory) area.  If you try to call it
from Applesoft it will call a routine in the Applesoft ROM instead.  It's
called by ProDOS only when the language card is active.

I think the FLUSH command is your best bet.
   _____
  ||___||  Jerry Kindall               |  Internet: jerryk@pro-tcc.cts.com
  |  o  |  2612 Queensway Drive        |  UUCP:     nosc!crash!pro-tcc!jerryk
  |__O__|  Grove City, OH  43123-3347  |  GEnie: A2.JERRY     ALine: A2 Jerry