Re: C2N232 + cbmlink on a PET 3032 with Basic 2/4

From: Marko Mäkelä <>
Date: Mon, 15 Oct 2012 13:15:47 +0300
Message-ID: <20121015101547.GC3923@x220>
Hi Anders,

>I tried both the "pet3001" and "pet4001" server programs. I was able to 
>load both, but neither works reliably with cbmlink once started. I have 
>enough ROM/EPROM to downgrade my PET to Basic 2, effectively making it 
>a 3032. However in the release notes for cbmlink, it says that the 3000 
>series "may not work", so perhaps it is a moot point?

I only tested the BASIC programs with the two or three 8032 that I had 
at that time. I do not remember if I got a success report from anyone 
who used a 4032. It has been a long time ago. One thing to try would be 
to load the "pet3001" or "pet4001" program to VICE and see what happens, 
that is, if it is jumping to the machine code, or where the machine code 
is misbehaving.

Do you think you can do this? I am busy with work currently. And I do 
not have any PET hardware any more, as you very well know. :-)

>I do have an IEEE interface for the VIC-20 too, perhaps that one would 
>work better with C2N232 and cbmlink?

I have never tried this. The C2N232 transfers on cbmlink are a bit 
unreliable especially on the C64 and C128, because the KERNAL routines 
can sometimes reset the state of the CASS READ signal by reading $dc0d 
or $dd0d. On the Vic-20 it should work better, as the 6522 needs an 
explicit write to clear a flag.

Best regards,


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Received on 2012-10-15 11:00:06

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