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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: 25 Mar 1996 18:08:48 +0100
- Organization: dis-
- Message-ID: <4j6jv0$1im@serpens.rhein.de>
- References: <64_5494@tna.nullnet.fi> <xR2rDMD0alz7@point86.people-s.people.de> <38233078@kone.fipnet.fi> <1549.6652T1430T1450@mbox.vol.it> <4isfo0$pfe@serpens.rhein.de> <2095.6655T1000T1836@mbox.vol.it>
- NNTP-Posting-Host: serpens.rhein.de
-
- bizzetti@mbox.vol.it (Fabio Bizzetti) writes:
-
- >It's not "all or nothing". Using the same chips speed, but having dual access
- >would already mean to avoid the syncronization with 7Mhz chipram bus clock.
- >And, whatever is the amount of DMA activity, the CPU wouldn't be slowed down.
-
- Obviously this is not true. Since RAM of a given speed just allows
- that many accesses per second you will have to slow down accesses.
-
- It is clear that you can do better than current 7MHz chip RAM but
- that's because RAM is faster nowadays.
-
- Most "dual port RAM" is just a multiplexed RAM anyway. There are only
- very few chips that really have two data paths to the RAM cells and
- these are low capacity high speed chips. Nothing you would want to
- make video memory from.
-
- >The ram is ok, it's Alice that runs the chipram bus at 7Mhz.
-
- Yes. That's why "dual ported RAM" is nonsense. We already have
- "dual port RAM", just the multiplexing is done outside the chip.
-
- >It seems that Escom/AT considers the actual AGA chipset as perfect, or anyway
- >"adequate". That's why the Amiga games market doesn't exist anymore.
-
- Modern games do not need smart chipsets. They need geometry engines,
- texture mapping and a fast chunky framebuffer. I.e. a Pentium and
- PCI graphics board.
-
-
- --
- Michael van Elst
-
- Internet: mlelstv@serpens.rhein.de
- "A potential Snark may lurk in every tree."
-