z88dk forums

On Sat, 21 Jul 2007, Dom Morris wrote:

I'm happy doing the interposer, there's quite a few places where it's
used: fcntl/cpc, cpcmath, graphics/cpc, stdio/cpc, stdio/ansi/cpc so it
may take a while to fix them all. It looks like ix is unused by the
firmware routines so I'll use that to hold the machine address.

Anyway, the interposer is done for all the CPC bits, since interrupts are
disabled in the CPC crt0 what we've got should just work, though it's not
nice to shut out the interrupt.

Can someone do the honours and confirm that things are working?

d.


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On Tue, 24 Jul 2007, alvin albrecht wrote:

I gave it a quick go and it's not working.  Instead of a crash it now
just hangs.  Unfortunately the Amstrad emulators I've tried don't have
debuggers so it's a lot more difficult to trace through the code
exactly.

Odd, it's pretty much the same code as the interposer I used for the
spectrum, I didn't think I did anything stupid.

One other thing:  I am using a version of cpc.lst that has got rid of
all the 8080 versions of subroutines.  Maybe that's it?  I'll see if I
can add in the interrupt stuff tonight.

Well, interrupts are disabled normally so I'm guessing Stefano knew there
were problems with the firmware. Actually another thing that puzzles me is
the massive stack offset at the start - over 6k...

d.


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