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- From: "Jyrki Saarinen" <jsaarinen@kone.fipnet.fi>
- Date: Fri, 15 Mar 96 13:15:33 UT
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- Subject: Re: 68040's Move16
- Message-ID: <38233012@kone.fipnet.fi>
-
-
- > I *think*that the problem is as follows: (please correct me if I am
- > wrong) The Move16 instruction uses the burst-transfer mode of the '040.
- > The Amiga 4000 (the only model shipping with a '040) has a badly
- > designed memory system that does not support burst mode.
- > Therefore the Move16 instruction will not work on a normal A4000 ,
- > although it should work on most '040 boards with better memory
- > handling.
-
- Burst mode has nothing to do with this. Move16 CAN be used
- on every 68040 in the Amiga, but NOT from/to CHIP-ram.
-
- Burst only means that 4 longs of memory can be fetched faster
- is they are "horizontal", A3640 has 7-7-7-7 cycles for
- one 16 byte fill, my Warp Engine has 4-2-2-2, so it uses burst.
-
- -- _
- a Stellar programmer _ //
- "Amiga - back for the future" \X/
-