Re: [cc65] 65816

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From: Marko Mäkelä (msmakela_at_cc.hut.fi)
Date: 2002-04-17 12:09:23


On Wed, 17 Apr 2002, groepaz wrote:

> oh yes you are right :o) i was thinking of the retroreplay anyway
> (which works fine together with a reu)... however, as far as i know
> the incompatibility isnt actually hardware-related

It is.  The Action Replay uses all of the $de00-$dfff space.  The
$de00-$deff area is used for a write-only bank and mode selection register
(originally 6 bits), and the $df00-$dfff area is mapped to on-cartridge
RAM or ROM whenever the cartridge is enabled.

I suspect that there are similar incompatibility issues with other memory
expansions.  But it would be nice at least to have a library that allows
all expansions to be accessed in a similar way.  Then it wouldn't be so
difficult to make programs support a wide range of expansions, one at a
time.

	Marko

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