Thanks Brad.
The settings you suggest are as they should be.
What happens is when I power up the machine, I am first of all prompted to
'Start with CD ROM support',
Then it goes through the normal boot process and I get
'PCI Bus Scan Complete'.
After this and a bit more boot process, the screen displays
'Loading'.
Then
'Preparing to start your computer. This may take a few minutes'.
Then I get the message
'Not reading from Drive A.
Abort Retry Fail'.
I put the floppy in, press R and it starts as it normally would.
Bewildered is me!
