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- Path: comma.rhein.de!serpens!not-for-mail
- From: mlelstv@serpens.rhein.de (Michael van Elst)
- Newsgroups: comp.sys.amiga.programmer
- Subject: Re: CHIP RAM speed test resul
- Date: 26 Mar 1996 08:31:40 +0100
- Organization: dis-
- Message-ID: <4j86gs$8kl@serpens.rhein.de>
- References: <64_5494@tna.nullnet.fi> <xR2rDMD0alz7@point86.people-s.people.de> <38233078@kone.fipnet.fi> <1549.6652T1430T1450@mbox.vol.it> <4isfo0$pfe@serpens.rhein.de> <9603250010.AA001uz@dookie.demon.co.uk>
- NNTP-Posting-Host: serpens.rhein.de
-
- Jonathan Belson <jon@dookie.demon.co.uk> writes:
-
- >Doesn't VRAM fall into the dual-port catagory?
-
- Sort of. But even there you just multiplex the RAM cells.
- Transferring data to the second port will steal cycles from
- the other port.
-
- The problem with VRAM and the custom chips is that the second
- VRAM port just allows a few access modes with low overhead because
- it is just a shift register. Interleaved access to bitplanes,
- as done by the Amiga chipset is not a supported access mode.
-
- Regards,
- --
- Michael van Elst
-
- Internet: mlelstv@serpens.rhein.de
- "A potential Snark may lurk in every tree."
-