🚀 go-pugleaf

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 £400.
>>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/