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- From: mjl-b@minster.york.ac.uk
- Newsgroups: comp.sys.atari.st.tech
- Subject: Re: Falcon BUS..
- Message-ID: <721059730.29705@minster.york.ac.uk>
- Date: 6 Nov 92 14:22:12 GMT
- References: <1992Nov05.142017.21039@bnr.ca>
- Reply-To: mjl-b@minster.york.ac.uk (Mathew Lodge)
- Organization: Department of Computer Science, University of York, England
- Lines: 33
-
- In article <1992Nov05.142017.21039@bnr.ca> grier@bnr.ca (Brian Grier) writes:
- >> 1) What is the speed of the Falcon's memory (Somebody said it had 0 wait
- >> states which seems to imply 16MHz, but they may have been wrong)
- >
- >The memory, as I said, is claimed to be 0 wait state memory. The question
- >is is the memory syncronous or asyncronous?
-
- What do you mean by this? It is my understanding of the 68k that the bus has
- always been asynchronous -- there is no fixed slot in the bus timing for
- reading or writing. The processor simply waits until the data has been
- transferred, when the peripheral asserts various lines to inform the 68k
- that it's finished.
-
- Do you mean burst mode, used for cache filling?
-
- >My best guess is that when people get to the Falcon in the REAL world
- >they increase the number of bits per pixel, causing a lot of extra time
- >to be spent drawing things, like letters and numbers. You will pay a big
- >price in performance for more bits per pixel on Atari systems. Refer to
- >the description of pixel memory in either the developer docs or the Abacus
- >internals guide.
-
- Please elaborate -- why do we pay for more bits per pixel on Atari systems?
-
- >Brian, WS1S
- >Bell Northern Research
- >Research Triangle Park, NC
-
- Mat
-
- | Mathew Lodge | "I don't care how many times they go |
- | mjl-b@minster.york.ac.uk | up-tiddly-up-up. They're still gits." |
- | Langwith College, Uni of York, UK | -- Blackadder Goes Forth |
-