Sorry for double post.
I also tried this (in GRUB4DOS)
And the error message "Fatal! Inconsistent data read from (0x9F)0+32" indeed appeared on my laptop.
So my usage could be wrong like Tinybit (GRUB4DOS maintainer) said in the bug report.
I also tried this (in GRUB4DOS)
Code:
map --mem /ubcd/images/fdubcd.iso.gz (hd32)
map --hook
map (hd32) (cd)
map --hook
root (cd)
map --hook
map (hd32) (cd)
map --hook
root (cd)
And the error message "Fatal! Inconsistent data read from (0x9F)0+32" indeed appeared on my laptop.
So my usage could be wrong like Tinybit (GRUB4DOS maintainer) said in the bug report.