11/34 failing trap test

Brad Parker brad at heeltoe.com
Wed Sep 20 06:20:45 CDT 2006


"Julian Wolfe" wrote:
>
>If so, it says to scope the problem, replace halt with 240 (is this JMP?)
>and replace the next instruction with 703 (what's that? Where I'm jumping
>to?)

240 is a nop.  I think the branch goes backward but I can't say where (-76?)

[brad at mwave host]$ echo -e -n "\240\0\303\1" >x
[brad at mwave host]$ od -o x
0000000 000240 000703
0000004
[brad at mwave host]$ /opt/tools/dec/pdp11/bin/pdp11-dec-bsd-objdump -D -b binary -m pdp11 x

x:     file format binary

Disassembly of section .data:

00000000 <.data>:
   0:	00a0           	nop
   2:	01c3           	br	0xffffff8a

-brad


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