Re: 17xx Routine Help

From: Marko Mäkelä <>
Date: Wed, 12 Oct 2016 08:44:33 +0300
Message-ID: <20161012054433.heimoxxou6l6k435@x220>
On Tue, Oct 11, 2016 at 11:57:33PM -0400, Nick Vivid wrote:
>Is there anything I'm obviously doing wrong in this routine?


>   reutoc642 lda #$b1
>            sta $fd01

$fd01 is not a magic address recognized by the REU. Maybe you meant 
$df01, which was used elsewhere in the program.

IIRC, apart from the $dfxx range, the REU is also sensitive for writes 
to $ff00, to allow convenient bank selection with the C128 MMU.

A long time ago, I wrote some REU routines for cbmlink. You can have a 
look at cbmlink/cbmsrc/mem/reubase.s.


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Received on 2016-10-12 06:02:11

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