[Coco] Superboard discussion: Serial EEPROM

[Mark Marlette]

At 01:23 AM 5/5/2004 -0700, you wrote:

Boisy and I have talked about it somewhat, never defined it. Always good 
for other inputs.



>--- Mark Marlette <mmarlett at isd.net> wrote:
> > At 09:57 AM 5/3/2004 -0500, you wrote:
> >
> > Darn software guys......
>
>*chuckle*
>
> >
> > We could VERY easily add a register that would be a byte or two wide that
> > could handle configuration, options data and SB presence info.
> >
> > Mark
> > Cloud-9
>
>Well then, aren't you glad I brought it up now? ;-)
>
>Thanks,
>Bob
> >
> > >On May 3, 2004, at 9:40 AM, Bob wrote:
> > >>Agreed.
> > >>
> > >>So, next question, and possibly one for a new sub-topic... how does a 
> 3rd
> > >>party
> > >>program detect the Superboard? and the installed options? Perhaps 
> another
> > >>byte
> > >>in the EEPROM with a bit for each option (would the unused 2 bits be
> > >>enough?)... just thinking out loud.
> > >
> > >Probably the easiest and most sure-fired way to detect the presence of 
> the
> > >SuperBoard would be to reserve an address in the $FF1X or $FF3X region
> > >which when POKEd, would return data about the board.  For instance:
> > >
> > >POKE &HFF3F,0
> > >?PEEK(&HFF3F)
> > >
> > >Would return 'S'.  Then...
> > >
> > >POKE &HFF3F,1
> > >?PEEK(&HFF3F)
> > >
> > >Would return 'u'....
> > >
> > >And so on and so forth.  The value POKEd into $FF3F would correspond to
> > >the position in the string where the character would be returned on the
> > >next read.  We could also embed serial number information this way.  So a
> > >maximum of 256 characters could be stored this way.  Such a string 
> could be:
> > >
> > >SuperBoard Rev 1.0 (Serial #0001)
> > >
> > >Of course, when POKING and PEEKING on a non SuperBoard CoCo 3, you would
> > >likely NOT get an S, u, etc...  so you could immediately detect the
> > >presence of a SuperBoard.
> > >
> > >
> > >--
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> > >Coco at maltedmedia.com
> > >http://five.pairlist.net/mailman/listinfo/coco
> >
> >
> >
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>
>
>
>
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