Am 19.10.2012 15:15, schrieb Michael Schnell:
On 10/19/2012 01:23 PM, Sven Barth wrote:
The question is in how far the Fido is compatible with the Motorola CPUs.
It's nearly 100% code-bit compatible with the 332 (aka CPU32), there are
some additions to provide multi-threading and power-Management (e.g. the
"trapx" and "sleep" instructions) and some additional registers
accessible by the movec instruction to support certain hardware
features. But there are only very few dropped features: the only I know
is that the source and destination function code registers do exist but
have no influence on the hardware,
I don't think that this is relevant to the compiler.
From what I can see from your explanation I'd agree. In the end only a
test can tell. As Pierre is already improving M68000 support you might
have more luck today than yesterday ;)
Also please keep in mind that currently neither the heap manager nor
stdio nor (likely) exceptions are working correctly. I need to address
these issues first so that the port becomes fully useable again (as
the target is to have again a native m68k-linux compiler).
Let me know when you want me to do any tests.
Once I'm satisfied myself everyone is welcome to test more complex
programs :)
For me it would be the easiest way to have fpc compile the Pascal
sources to ANSI C gnu compatible object code (*.a files ? ) so that I
can just link it to an existing ANSI-C project. Here the heap management
would be done by the GNU C library (or am I wrong ?). But I don't know
how the FPC RTL comes into play...
It would be easier if you'd use the C code from within FPC code. You
might also circumvent heap manager issues by using the "cmem" unit. But
as I already wrote I'm currently using the user space emulation of QEMU
and with that I don't have the need to find/compile corresponding C
libraries and I'd anyway like to have FPCs normal syscall interface for
Linux working. Also I don't know how well FPC will handle it if I let it
link to libraries as this is not tested yet...
Regards,
Sven
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