I totally agree. The Bootloader should have an (optional) debug ability but
I think that a register monitor would be perfect.

Rather than coding space consuming debug messages, you just insert a copy of
PC into W and a call to the register display routine at appropriate places
in the code. Depending on the value of a pin, register, etc. the routine
just returns or displays all the current register values to the PC. Using
the PC value in W the debug display could even include the source with the
line of code that the call originated on highlighted. If W is important to
you, save it in a file register. That is three instructions max per debug
entry.

Now, think about how many times you would have sold your left earlobe for
that ability on a production product or remote from the customers site.

James Newton
mailto:jamesnewton@geocities.com
1-619-652-0593 phone

----- Original Message -----
From: Soon Lee <psln@CYBERWAY.COM.SG>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Saturday, April 01, 2000 07:48
Subject: Re: ROMzap


> Hi Tony
>
> Thanks for everything you have done
> With your design of the romzap, I manage to create my own set of
prototyping
> tools.
> I have make the loader into something similar to the SX key so what I need
> to do is to create a programming header on-broad all my PCB then I can do
> both programming and debugging, I have a suggestion here. why don't you
have
> a debug screen (like bs2) after you run the program(since the com is
already
> open), currently I am using comlite32 to monitor the com data. and it is
> really very useful when it come to debuging
>
> Thanks again
>
> regards
> soon lee
>
> ----- Original Message -----
> From: Tony Nixon <Tony.Nixon@ENG.MONASH.EDU.AU>
> To: <PICLIST@MITVMA.MIT.EDU>
> Sent: Thursday, March 30, 2000 6:44 AM
> Subject: Re: ROMzap
>
>
> > Soon Lee wrote:
> > >
> > > Hi Tony
> > >
> > > Sorry to ask but what is the different between the two circuit in the
> PDF
> > > file?
> > > RomZap is really a good picece of equipment when it come to
prototyping
> > >
> > > Thanks
> > >
> > > regards
> > > soon lee
> >
> > Hi Soon Lee,
> >
> > The first circuit allows ROMzap to program the boot code into the chip
> > without a programmer. The second is a circuit template for using the
> > chip in any application but you can update the user code with ROMzap.
> >
> > Thanks for the kind comments.
> >
> > ROMzap was uploaded again today because of some minor bugs I discovered
> > while using it in my own project. V300300
> >
> > --
> > Best regards
> >
> > Tony
> >
> > http://www.picnpoke.com
> > mailto:sales@picnpoke.com



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