Toshiba laptop

Does anyone know if a Toshiba Satellite 1800/1805 laptop should be able to
boot Qnx 4.25?

I tried putting 4.25C on it, but it goes as far as 2 dots on the alternate
OS image line
and then either stops or reboots.

It will boot off a boot floppy and the install will run, but I can’t get it
to boot from the HD.

-Glenn Sherman