...
it never occurred to me that I couldn't boot both 64 & 32
from the same GRUB.
...
and installing TC32 needs a different grub ?
Where is THAT grub ?
OK labeas, Heads up!
Yes you can boot both TC-10-x86 and TC-10-x86_64 from Grub2 (but you must install the 64bit version of grub2)
Please don't use TC10-x86 (32bit) version of grub2, it only for old 32bit EFI firmware, specifically early and limited manufactured Apple MacBook 32bit EFI firmware. I am not aware of any other Intel based hardware that ever used a 32bit EFI. A PC which has a 32bit EFI firmware requiring a 32bit EFI grub2 is an extremely rare species and I doubt very much if you have one of these. So Please don't use the grub2 32bit version on any modern 64bit hardware.
From Grub2 "
64 bit version installed from corepure64"
you may run any and all these TC versions
TC-10-x86 (tinycore 32bit)
TC-10-x86_64 (core64)
TC-10-x86_64 (corepure64)
Didn't more experienced TC users, see that of
the several <grub.cfg entries> the 32bit one had it's files in a
different dir
The only way to boot either 32bit or 64bit TC versions is for each version to have a dedicated TCE directory, I noticed but that is the correct way to accomplish multi boot scenario.
In fact I run the last three 8,9 & 10 TC versions each with "tinycore 32bit", "Core64" & "Corepure64" editions from my current USB Stick(s) using grub2 (64bit)
Each version and each architecture runs from a dedicated tce directory.