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Re: Possibly stupid question about cc65 and the Language Card

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Hi,

fadden said:

> Both MAME and AppleWin provide debuggers.  You can find a couple of
> "cheat sheets" here: https://6502disassembly.com/applewin-dbg.html
>   https://6502disassembly.com/mame-dbg.html

Thanks, I've started diving into mame and its debugger. I must say it's
quite complicated for me, as I don't know 65C02 assembly - but well,
maybe I'll get somewhere, I may not be too old to learn new stuff!

Oliver said: 

> I can't solve your issue but I can say, that I'm using the LC in that
> way in most of my cc65 projects. At least some of my projects are
> somewhat popular and I never got any feedback that there would be an
> issue with that LC usage. So in contrast to e.g. the serial driver
> ;-) that LC usage is a well tested feature.

Yes, actually, maybe my problem comes from the use of both LC and the
"less-well-tested" serial driver:
I seem to have noticed that there are memory writes to the D400-DFFF
region when using the serial driver? If this is possible?

But I'm not even sure of my finding, and even then, I don't know why
that would crash, as according to my map file, my code doesn't go as far
(D400-D8ED according to the map file) as where those writes happen
(DFB7-DFC8 according to MAME).

I've uploaded a minimal reproducer in case you'd like to look at it and
tell me how I'm wrong - because I probably am, but don't feel any
pressure, I'll figure something out :)

https://colino.net/a2dbg/a2-min.c #for the Apple2
https://colino.net/a2dbg/pc-min.c #for the PC
https://colino.net/a2dbg/mame-log.txt #my debugger experiments.

I set the watchpoint when the Apple2 test program has output "any key to
install". The writes happen after receiving a character from the PC. If
the PC doesn't reply, or sleeps a few dozens milliseconds before
answering, no write happen to $DFB7-DFC8).
But at some point with my real program, they happen, even with liberal
use of usleep() before replying. 

Thanks for reading me anyway, and I'll tell you guys if I make some
progress. 

I miss valgrind a lot, haha !

-- 
Colin

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Possibly stupid question about cc65 and the Language Card Colin Leroy-Mira <colin@colino.net> - 2023-01-06 00:42 +0100
  Re: Possibly stupid question about cc65 and the Language Card Oliver Schmidt <ol.sc@web.de> - 2023-01-06 01:18 +0000
    Re: Possibly stupid question about cc65 and the Language Card Colin Leroy-Mira <colin@colino.net> - 2023-01-06 18:05 +0100
      Re: Possibly stupid question about cc65 and the Language Card Oliver Schmidt <ol.sc@web.de> - 2023-01-07 09:39 +0000
        Re: Possibly stupid question about cc65 and the Language Card Colin Leroy-Mira <colin@colino.net> - 2023-08-15 17:03 +0200
          Re: Possibly stupid question about cc65 and the Language Card Colin Leroy-Mira <colin@colino.net> - 2023-08-15 22:28 +0200
            Re: Possibly stupid question about cc65 and the Language Card qkumba <peter.ferrie@gmail.com> - 2023-08-15 15:21 -0700
              Re: Possibly stupid question about cc65 and the Language Card Colin Leroy-Mira <colin@colino.net> - 2023-08-16 04:29 +0200
      Re: Possibly stupid question about cc65 and the Language Card fadden <fadden@fadden.com> - 2023-01-07 08:25 -0800
        Re: Possibly stupid question about cc65 and the Language Card Colin Leroy-Mira <colin@colino.net> - 2023-01-07 18:25 +0100
          Re: Possibly stupid question about cc65 and the Language Card Colin Leroy-Mira <colin@colino.net> - 2023-01-07 19:15 +0100
            Re: Possibly stupid question about cc65 and the Language Card qkumba <peter.ferrie@gmail.com> - 2023-01-07 19:32 -0800
              Re: Possibly stupid question about cc65 and the Language Card Colin Leroy-Mira <colin@colino.net> - 2023-01-08 11:41 +0100
                Re: Possibly stupid question about cc65 and the Language Card qkumba <peter.ferrie@gmail.com> - 2023-01-09 07:30 -0800
                Re: Possibly stupid question about cc65 and the Language Card Colin Leroy-Mira <colin@colino.net> - 2023-01-09 16:36 +0100

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