This is everything I got.
I don't see anything useful.
Command lines:
qemu -L . -serial file:nextstep33-floppy.log -fda 3.3_Boot_Disk.floppyimage -hda nextstep33.qcow2 -cdrom NeXTStep\ Release\ 3.3\ for\ Intel\ Processors\ and\ NeXT\ Computers.iso - monitor stdio
qemu -L . -serial file:nextstep33-hdd.log -hda hd.img -monitor stdio
qemu -L . -monitor stdio -serial file:nextstep32.log -fda 3.2_Boot_Disk.floppyimage
qemu -L . -monitor stdio -serial file:openstep40.log -fda 4.0_Install_Disk.floppyimage
qemu -L . -monitor stdio -serial file:openstep42.log -fda 4.2_Install_Disk.floppyimage
qemu -L . -monitor stdio -serial file:rhapsody-dr1.log -fda Rhapboot.img
qemu -L . -monitor stdio -serial file:rhapsody-dr2.log -fda InstallationDisk.image
qemu -L . -monitor stdio -serial file:darwin131.log -cdrom Apple\ Darwin\ 1.3.1\ (x86).iso
qemu -L . -monitor stdio -serial file:darwin141.log -cdrom Apple\ Darwin\ 1.4.1\ (x86).iso
qemu -L . -monitor stdio -serial file:darwin602.log -cdrom Apple\ Darwin\ 6.0.2\ (x86).iso
qemu -L . -monitor stdio -serial file:darwin701.log -cdrom Apple\ Darwin\ 7.0.1\ (PowerPC\ and\ x86).iso
qemu -L . -monitor stdio -serial file:darwin801.log -cdrom Apple\ Darwin\ 8.0.1\ (x86).iso
nextstep33 bootloader is NeXTStep boot 3.3.3.8, corresponding to NextStep 3.3. nextstep32 bootloader is NeXTStep boot 1.28, corresponding to NextStep 3.2. openstep40 bootloader is OPENSTEP boot 40.11, corresponding to OPENSTEP for Mach 4.0. openstep42 bootloader is OPENSTEP boot 40.13.1, corresponding to OPENSTEP for Mach 4.2. rhapsody-dr1 bootloader is Rhapsody boot 5.0.24, corresponding to Apple Rhapsody Developer Release. rhapsody-dr2 bootloader is Rhapsody boot 5.0.40, corresponding to Apple Rhapsody Developer Release 2. darwin131 bootloader is Darwin Intel boot 5.0.80.1, corresponding to Apple Darwin 1.3.1 (Mac OS X 10.0). darwin141 bootloader is Darwin/x86 boot 5.0.83.2, corresponding to Apple Darwin 1.4.1 (Mac OS X 10.1). darwin602 bootloader is Darwin/x86 boot 5.0.94, corresponding to Apple Darwin 6.0.2 (Mac OS X 10.2). darwin701 bootloader is Darwin/x86 boot 5.0.111, corresponding to Apple Darwin 7.0.2 (Mac OS X 10.3.1). darwin801 bootloader is Darwin/x86 boot 5.0.122, corresponding to Apple Darwin 8.0.1 (Mac OS X 10.4.1).
Darwin 6.0.2 bootloader IS WORKING, countdowns, receive keypresses, loads xnu, then xnu hangs. Darwin 7.0.1 bootloader IS WORKING, countdowns, receive keypresses, loads xnu, xnu starts loading modules, xnu panics (unable to mount root device). Darwin 8.0.1 bootloader IS WORKING, countdowns, receive keypresses, loads xnu, xnu starts loading modules, xnu mounts root, xnu starts installation, works flawlessly.
NextStep floppy images can be downloaded from http://download.info.apple.com/Apple_Support_Area/Apple_Software_Updates/Mul... OpenStep floppy images can be downloaded from http://download.info.apple.com/Apple_Support_Area/Apple_Software_Updates/Mul... Rhapsody floppy images are under NDA. Darwin CD images and bootloader source code can be downloaded from http://www.opensource.apple.com/
Luckily as Darwin is showing the same fail, and then, starts working, the source is available for checking.
Regards