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I use NetBSD 1.4 (BOOTX) on Atari Falcon 030: 14 Mb RAM, 520 Mb SCSI disk IBM-DSAS3540 (targ 0),
SCSI2 CDROM TOSHIBA (targ 5) with a RGB atari monitor (resolution 768x480 256 colors)
and I often have to reboot 2 or 3 times before having NetBSD running correctly.

When it crashes at reboot, I have:
vm_fault, trap type 8
kernel: MMU fault trap
dump registers and panic:MMU fault

traces on debugger are:
_Debugger (8,2104,8,1ec64,2315bf4) +6
_panic (9b4ff,2315c50,0,cf7a0,1ec64) +52
_panictrap (8,402a64d,2,2315c50) +a8
_trap (8,402a64d,2) +43c
_run_main (317e80,2315d30,9d13c,0,2000) +d4
_cdmaint (0,2000,0,11,11) +3e
_intr_dispatch (20,0,cbf30,e16cb,20000000) +ac
_intr_glue (?)
_mi_switch (2004,e000,0,0,100000) +4

Sometimes, I have the message "spurious interrupt" but NetBSD is running with no crash.
Thanks for help not to reboot several times on Falcon