loading OS image


i want QNX run on my old PC 486 (DX 33Mz !) which get only 4 Mo of RAM. I know it’s very old, but i wish testing the serial port.
When OS image is loading from floppy, i see : … and that’s all ! nothing more, like a too big OS image on a better PC
my OS image is only 650 Ko big
any suggestions for my test ?

thank very much

build file in studio pls