Date   : Fri, 04 Dec 2009 23:20:15 +0100
From   : kortink@... (John Kortink)
Subject: Tube - I/O processor memory questions

On Fri, 04 Dec 2009 21:34:38 +0000, Kevin Bracey
<kevin@...> wrote:

>[...]
>
>>>> Entry is with C=0 for reset triggered start (hard/soft/power on).      
>>>>       
>>> I think we can count that as a cunning hack, rather than a proper
>>> API. Not found it in my manuals either.
>>  
>> It's not a hack, it's documented, and the MOS code has specific
>> SEC/CLC instructions to explicity set the state.
>>   
>Haven't found the documentation in contemporary manuals. Pointer?

One reference is page 292 of the New Advanced User Guide
(see http://212.123.133.121:8080/home/media/index.htm for
a nice copy of it).

>Looking at the disassembly I do agree it was probably the intent

It clearly wasn't, at all.

I've fixed that and several other bugs in my intelligible
reassembly of Tube OS 1.10 for ReCo6502, but of course it
will be rather ineffectual, after so many years of it not
working (and probably nobody bothering to write any new
2p software anyway).


John Kortink

-- 

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