On 1 Feb 2009, at 13:00, Frode Tennebø wrote:
On Saturday 31. January 2009, Andrew Collier wrote:
Hi,
AS you may know, if you CALL a machine code routine with some
parameters, they are pushed onto the ROM's floating point calculator
stack. I'm trying to use this, but having some difficulty getting the
numbers back out again. Can anyone spot what's going wrong?
Since no one else has come to the rescue I'll give it a shot from 20
years old memory. The sequence seems right at first glance, I would
therefore look at something external. first thing to check is that
you
are not using bank D and that interrupts are disabled. Then check
that
it is indeed 32768 and 81920 which are stored on the stack initially.
Hi,
Thanks, I've found the problem now. What I'd forgotten was that you
get two FPC stack entries for each parameter - the first describes the
type (which allows for CALL statements with string arguments) and this
is what was coming out as 0xc0 every time.
Cheers,
Andrew
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--- Andrew Collier ----
---- http://www.intensity.org.uk/ ---
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