Original kernel configuration for YDL 2.3

[E. Robert Tisdale]

I have just installed YDL 2.3 on a 667 MHz Apple Titanium PowerBook G4
laptop computer.
Now, I need to modify ptrace and rebuild the kernel
but I don't want to change the kernel configuration.

My

    /usr/src/linux/README

file tells me that I can use the alternate configuration command

    $ make oldconfig

to default all questions based on the contents of my existing

    ./.config

file.  The problem is that there is no

    /usr/src/linux/.config

file.  Can anybody tell me where I might find
the ./.config file left behind by the configuration
of the original Linux kernel for YDL 2.3?

I tried

     /usr/src/linux/configs/kernel-2.4.19-ppc.config

but some of the modules would not install and I lost sound.

Thanks in advance.