RE: Data Becker CBM-8000 hi-res graphics

From: Baltissen, GJPAA (Ruud) <ruud.baltissen_at_apg.nl>
Date: Tue, 5 Sep 2017 06:58:00 +0000
Message-ID: <54F350D2C6501448A3EE14B7854C5FB563D8CA34@WSV10441N3.office01.internalcorp.net>
Hallo Vossi,


> @Ruud: Please send me the disassembly to vossi@ceffy.de

I can send you an uncommented one right away. But I thought I had the commented sources of the 8032 as well but it seems I was wrong. These are needed to know what routines this ROM is calling and what RAM addresses are used. So I started with creating a commented 8032 ROM first.  A commented DB-ROM therefore will take a bit longer than I thought, sorry.

Just to be sure: 
The DB card has extra memory which is accessible using three registers:
- $E882 holds the LB of the address of a byte of this memory
- $E888 holds the HB of the address of a byte of this memory
- $E88A is used to write data into this extra memory


Met vriendelijke groet / With kind regards, Ruud Baltissen

www.Baltissen.org



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Received on 2017-09-05 07:00:02

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