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- Newsgroups: comp.sys.amiga.programmer
- Path: sparky!uunet!mcsun!Germany.EU.net!mpifr-bonn.mpg.de!speckled.mpifr-bonn.mpg.de!mlelstv
- From: mlelstv@speckled.mpifr-bonn.mpg.de (Michael van Elst)
- Subject: Re: Library Call?
- Message-ID: <1992Jul21.132102.4241@mpifr-bonn.mpg.de>
- Sender: news@mpifr-bonn.mpg.de
- Nntp-Posting-Host: speckled
- Organization: Max-Planck-Institut f"ur Radioastronomie
- References: <jbickers.0bfo@templar.actrix.gen.nz> <paulk.0tlw@terapin.com>
- Date: Tue, 21 Jul 1992 13:21:02 GMT
- Lines: 17
-
- In <paulk.0tlw@terapin.com> paulk@terapin.com (Paul Kienitz) writes:
-
- >Getting the value from fast ram wold save a cycle here and there, I
- >presume. Though if you're accessing _SysBase with 32 bit absolute
- >addressing (large data), then it might be slower insteadf faster.
-
- Now, _SysBase could be accessed relative to a base register (A4 with
- most compilers) which again is same speed as $4.w. But the penalty
- for accessing $4.w can be quite large if you use heavy overscan with
- 16 color hires (or while the blitter is busy!).
-
- Regards,
- --
- Michael van Elst
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