Re: [cc65] Atari Extended Memory Driver Anybody?

From: Oliver Schmidt <ol.sc1web.de>
Date: 2012-08-12 20:57:42
Hi,

> I thought of that, but the only way to test this is write some unique value
> into each bank and then read it back. This has the unfortunate consequence
> of trashing main memory at $4000 if the extended memory is not there.

Same game on the Apple II: One needs to save the value in main memory
and restore it after testing.

The bigger issue is that you have to do this testing again from a
"safe place" like the CPU stack - while trying to keep the test code
small (ideally not larger than the copy routine discussed before).

Regards,
Oliver
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Received on Sun Aug 12 20:58:11 2012

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