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- Path: sparky!uunet!mcsun!sunic!aun.uninett.no!nuug!fredrik.atari.no!jornmoe
- From: jornmoe@fredrik.atari.no (Joern Moe)
- Newsgroups: comp.sys.atari.st.tech
- Message-ID: <H.nI30B276Xd_@fredrik.atari.no>
- Organization: Atari Corp. Scand. AB (Norway)
- Subject: Re: Falcon '030 BUS: 16 or 32 bit?
- References: <1992Nov17.050651.18469@rmece49.upr.clu.edu>>
- <H.QHklPxgdMm2@fredrik.atari.no> <28341@castle.ed.ac.uk>
- <1992Nov19.043306.17354@elroy.jpl.nasa.gov> <28422@castle.ed.ac.uk>
- Reply-To: jornmoe@fredrik.atari.no
- X-Software: HERMES GUS 1.03 Rev. Apr 14 1992
- Date: Fri, 20 Nov 1992 21:57:50 MET
- Lines: 28
-
- In <28422@castle.ed.ac.uk>, Mark Steyn writes:
- **** some stuff deleted ****
- >wait to use the machine to see. I have my concerns about the speed of
- >the graphics over a 16 bit bus, though. 16 bit graphics over a 16 bit
- >bus, sharing access with the processor does not sound as though it will
- >be particularly fast.
-
- The memory is 32 bit wide, the CPU <-> memory bus is 16 bit wide but the
- videochips <-> memory bus is 32 bit wide! This is WERY similar to the TTs
- videomemeory, except that the TTs videomemory is 64 bit wide (YES, i said
- 64 bit wide, and I have the scematics, so there's no doubt about it) but
- the CPU (68030) of course acsesses this memory through a 32 bit wide bus!
-
- >And how do you intend to plug your 32 Ram expansion in?
- >The PDS internal slot is 16/24 bit.
- >The processor is surface mounted.
- >Umm... not much else is there?
-
- The coprocessor socket have the full databus of the 68030, then the problem
- would be the address bus, but with soldering only TWO leads directly to the
- 68030s adresslines and taking the 24 lower addresslines from the expansionbus,
- one can have 32MB of Fast-ram. Shouldn't be too hard to do, or what?
-
- --
- _______________________________________________________
- / Joern F. Moe / All above is my own personal opinion! \
- / Oslo, Norway / Any lack of opinion above is also mine! \
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-