Command:
./qemu-system-sparc64 -M niagara -L /git/md/bin/t1_boot_fix/256/ -nographic -m 256 -drive if=pflash,readonly=on,file=/zroot/iso/sol-11-1111-text-sparc.iso

Result: FAIL/panic (boot temp overflow)

Output:
cpu Probing I/O buses


Sun Fire T2000, No Keyboard
Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
OpenBoot 4.20.0, 256 MB memory available, Serial #1122867.
[mo23723 obp4.20.0 #0]
Ethernet address 0:80:3:de:ad:3, Host ID: 80112233.



ok boot -kdv
Boot device: /virtual-devices/disk@0  File and args: -kdv
hsfs-file-system
Loading: /platform/sun4v/boot_archive
ramdisk-root ufs-file-system
Loading: /platform/sun4v/kernel/sparcv9/unix
module /platform/sun4v/kernel/sparcv9/unix: text at [0x1000000, 0x10e2677] data at 0x1800000
module /platform/sun4v/kernel/sparcv9/genunix: text at [0x10e2678, 0x1306ae7] data at 0x19373c0
module /platform/sun4v/kernel/misc/sparcv9/platmod: text at [0x1306ae8, 0x1306aef] data at 0x198d698
module /platform/sun4v/kernel/cpu/sparcv9/SUNW,UltraSPARC-T1: text at [0x1306b00, 0x13096f7] data at 0x198dd00
Loading kmdb...
module /platform/sun4v/kernel/misc/sparcv9/kmdbmod: text at [0x1309700, 0x138a397] data at 0x19a5e50
module /kernel/misc/sparcv9/ctf: text at [0x138a398, 0x1391f9f] data at 0x19c33b0
panic - kernel: boot temp overflow
Program terminated
ok