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- From: peck@natinst.com (Joseph Peck)
- Newsgroups: comp.sys.amiga.graphics
- Subject: Re: more on sprites & 3.0/4000
- Date: 20 Nov 1992 13:25:55 -0600
- Organization: National Instruments, Austin, TX
- Lines: 25
- Message-ID: <1eje43INN3oq@falcon.natinst.com>
- References: <By0r3C.B4u@fc.hp.com>
- NNTP-Posting-Host: falcon.natinst.com
- Keywords: graphics sprites 4000 AGA
-
- In article <By0r3C.B4u@fc.hp.com> koren@fc.hp.com (Steve Koren) writes:
- >A while ago I posted a note asking whether sprites changed in OS 3.0.
- >The answer I got was "no, but overscan screens will make higher numbered
- >sprites disappear".
- >
- >Well, this turns out not to be what is causing my problem. I can open a
- >NON-overscan screen, and sprites still don't work.
-
- There are at least two reasons for sprites to disappear, and this was
- true on the A3000 as well. The first is overscan, the second is the
- screen position on the display. Try moving the screen as far to the
- right as possible. (for all of you comedians out there, I don't
- mean that you should move your monitor further to the right on
- your desk... :)
-
- There are a limited number of dma time slots, and the display has
- priority over the sprites. As the screen is moved to the left, the
- data must be fetched earlier in the line, and will cause the sprites
- to disappear. I don't know if this will fix your problem, but it
- did take care of mine on a 3000.
-
- > - steve
-
- Joe Peck
- peck@natinst.com
-