On Sun, Feb 12, 2012 at 20:08, Andreas Schwab <sch...@linux-m68k.org> wrote:
> Finn Thain <fth...@telegraphics.com.au> writes:
>
>> I don't know what those differences might be but the aranym developers may
>> have some ideas. They may even know how to get the CPU to identify itself.
>
> You could probe for the natfeat instruction.
The userspace program below nicely crashes ARAnyM (0.9.9-1 Ubuntu) with
| Gotcha! Illegal memory access. Atari PC = $800004dc
| If the Full History was enabled you would see the last 20 instructions here.
#include <stdio.h>
asm("\n"
" .global nf_get_id,nf_call\n"
"nf_get_id:\n"
" .short 0x7300\n"
" rts\n"
"nf_call:\n"
" .short 0x7301\n"
" rts\n"
"1: moveq.l #0,%d0\n"
" rts\n"
" .section __ex_table,\"a\"\n"
" .long nf_get_id,1b\n"
" .long nf_call,1b\n"
" .previous");
int main()
{
unsigned long id, version;
char buf[256];
id = nf_get_id("NF_VERSION");
if (!id)
return;
version = nf_call(id);
id = nf_get_id("NF_NAME");
if (!id)
return;
nf_call(id, buf, 256);
buf[255] = 0;
printf("NatFeats found (%s, %lu.%lu)\n", buf, version >> 16,
version & 0xffff);
return 0;
}
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- ge...@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
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