6300/120 won't go into OpenFirmware

I have a Performa 6300/120 currently with MacOS on it. I have put the required files (yaboot etc) in the root of the HDD. When I try to get the OpenFirmware prompt, (apple option o f) it just ignores it and goes to MacOS. Suggestions ? thanks in advance Richard

Re: 6300/120 won't go into OpenFirmware

Take a look at the nubus-pmac project on SourceForge. http://nubus-pmac.sf.net/ The Performa 6300 is listed as a supported model. Since this is a NuBus based Macintosh, it doesn't have OpenFirmware (which is only on PCI based Macs). This would explain quite well why it ignores the request to