With the latest checkin the Solaris 8 iso changes its output, getting quite some further..
[sparc] Booting file 'cdrom' without parameters. Loading a.out image... Loaded 7680 bytes entry point is 0x4000 Jumping to entry point... device iommu size -1 device sbus size -1 device eeprom address prop too big device auxio size -1 required device iommu not mapped required device eeprom not mapped required device sbus not mapped qemu: fatal: Trying to execute code outside RAM or ROM at 0xff00000d