Re: Data Becker CBM-8000 hi-res graphics

From: Anders Carlsson <>
Date: Thu, 7 Sep 2017 10:47:30 +0200
Message-ID: <D7DF5A98B552486FBE109713103451CC@ryds>
Greg King wrote:

> The CBM 8032 has BASIC 4.
> But, the C64 has only BASIC 2.

As far as I understand, the BASIC V2 in the VIC-20 and C64 is a cut down 
version of BASIC V4 in the 4032/8032, rather than the old BASIC V2 found in 
the 2001/3032 variants. Bugs from the old V2 are fixed, the Microsoft Easter 
Egg I believe is removed and so are the disk commands like CATALOG, HEADER, 
the special DS$ variable and so on.

But yes, a truncated BASIC will lead to different addresses and possibly 
changed code so that is why Ruud's cross translation from C64 sources got 
stuck. I'm surprised if there are no previous annotated disassemblies of the 
8032. At least we have some memory maps with entry points to routines as 
indicated, which was enough to partly understand what the Data Becker 
routines are doing, in the mean time waiting for the complete disassembly of 
the ROMs.

Best regards

Anders Carlsson

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Received on 2017-09-07 09:00:49

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