(Not Windows 10). I look for something which I can follow line by line.
bhyve -c 2 -m 3G -H -w \
-s 0,hostbridge \
-s 3,ahci-cd,./win8.iso,sectorsize=512 \
-s 4,ahci-hd,disk.img,sectorsize=512 \
-s 29,fbuf,tcp=0.0.0.0:5900,wait \
-s 30,xhci,tablet \
-s 31,lpc \
-l com1,stdio \
-l bootrom,/usr/local/share/uefi-firmware/BHYVE_UEFI.fd \
win8
UEFI Interactive Shell v2.1
EDK II
UEFI v2.40 (BHYVE, 0x00010000)
Mapping table
BLK0: Alias(s):
PciRoot(0x0)/Pci(0x3,0x0)/Sata(0x0,0x0,0x0)
BLK1: Alias(s):
PciRoot(0x0)/Pci(0x3,0x0)/Sata(0x0,0x0,0x0)/CDROM(0x0)
BLK2: Alias(s):
PciRoot(0x0)/Pci(0x4,0x0)/Sata(0x0,0x0,0x0)
Press ESC in 1 seconds to skip startup.nsh or any other key to continue.
Shell>