Re: NetBSD in SIMH vax with 512 MB RAM

[Anders Magnusson <ragge%tethuvudet.se@localhost>]

> I have a little hard time believing it's the CAS handling that is 
> having a problem with large memories though. Why do you think it's there?
% grep CASMAGIC include/trap.h
#define    CASMAGIC    0xBEDABABE /* high end of S0 space */

        .globl  cas32_ras_start, cas32_ras_end
cas32_ras_start:
        movl    %r1, (%r4)
        movl    *(%r4), %r0
        cmpl    %r2, %r0
        bneq    1f
        movl    %r3, *(%r4)
cas32_ras_end:
1:
        movl    $CASMAGIC, (%r4)
        rsb