home *** CD-ROM | disk | FTP | other *** search
- Path: comma.rhein.de!serpens!not-for-mail
- From: mlelstv@serpens.rhein.de (Michael van Elst)
- Newsgroups: comp.sys.amiga.programmer
- Subject: Re: AddIntServer + VERTB strangeness
- Date: 1 Apr 1996 20:11:51 +0200
- Organization: dis-
- Message-ID: <4jp697$ap6@serpens.rhein.de>
- References: <199603311305.NAA20741@mailhost.unibol.com>
- NNTP-Posting-Host: serpens.rhein.de
-
- John Girvin <jgirvin@bfs.unibol.com> writes:
-
- >erm, apology time *blush* I missed the bit in the RKMs that says youre
- >not allowed to abort VERTB interrupt chains, which is what I was doing.
- >So: sorry! I really should read documentation, not skim over it I guess...
-
- *smile* :)
-
- >What is the graphics.library bug?
-
- It expects register A0 to point to the custom chips, so if you add a server
- _ahead_ of the graphics.library vblank server (i.e. use a priority of 10 or
- higher) then you must provide the expected value (or save/restore A0).
-
- >So theres nothing I can do then? I just let the OS VERTB interrupts run
- >and cause my nice smooth display to jerk and shudder? *sigh* Maybe Ill
- >find another way to do it...
-
- The display doesn't necessarily jerk and shudder. You need to take care about
- two things: leave enough CPU free for the system (1% if you block Intuition
- and 5-10% if you leave input.device alone) and run code at the priority it
- needs (maybe at the expense of some moderate buffering).
-
- Regards,
- --
- Michael van Elst
-
- Internet: mlelstv@serpens.rhein.de
- "A potential Snark may lurk in every tree."
-