Hi Jonathan - you may be right, although on the Artsoft website they quote 1GHz and 512MB RAM. As a hobbyist with limited funds, I'm not too worried about speed at the moment, but if the machine is a potential source of problems then I'll need to look at it.

I'm still confused by the result of the Artsoft drivertest program and the Mach3 diagnostic page - as I said in an earlier post:
"The drivertest program shows a message 'pulsing too fast' but the pulses per sec show as about 15000 to 17000 where I believe 25000 is required, BUT in Mach3 diagnostics page pulses is always within 10 of 25000. These seem to be contradicting messages?"
Can anyone enlighten me?

Cheers
Ian