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- Path: news.netspace.net.au!usenet
- From: astroboy@netspace.net.au (Paul Dossett)
- Newsgroups: comp.sys.amiga.introduction
- Subject: Re: A2320 (Amber) Card ?
- Date: 5 Mar 1996 11:14:38 GMT
- Organization: NetSpace Online Systems
- Message-ID: <1118.6638T1037T2840@netspace.net.au>
- References: <4h6var$1g86@columba.udac.uu.se> <898.6636T984T2011@netspace.net.au> <4hedks$2rfe@columba.udac.uu.se>
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-
- Markus Kvisth (d92mkv@Minsk.docs.uu.se) said:
- >astroboy@netspace.net.au (Paul Dossett) writes:
-
- >>You can't use the A2320 with AGA - it doesn't have the memory to hold an
- >>entire screen at once. You need the Scan Doubler II, which costs รบ400.
- >>Ignore it.
-
- >Wait a minute ! It surely must have enough memory for all kinds of PAL
- >screens (ie. 640x512...) that are what I want it to promote ? Does it
- >also mess with screens that it can't handle (and destroys them) ?
-
- No, no, no, my dear boy... let's do some sums.. :)
-
- ECS:
-
- 640*512*4 bytes (16 colours) = 163840 bytes = 160Kb
-
- AGA:
-
- 640*512*8 byes (256 colours) = 327680 bytes = 320Kb = BANG!
-
- You just ran out of buffer memory ;)
-
- Unless you just want to use it for ECS screens, and I make no guarantees that
- that works properly either as ECS has a 16bit data path, and the A2320 might
- slow down AGA still further or just plain lock up.
-
-
- --
- Paul Dossett | EpiphoneYamahaPearlPaiste | Amiga 2000/040/17/365/3.1 __
- -------------| Amiga owner since 1988! | Amiga CD32/020/10/200/3.1__///
- Melbourne OZ | astroboy@netspace.net.au | 1976 Toyota Corolla 1.2 \XX/
-
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