The driver now compiles with the rest of the kernel. I modified files.isa 
some more ('attach xxx at isa' s now 'attach xxx at isa with xxx_isa'). My 
cfattach structure was named xxx_isa_ca (since the driver has MI code and 
ISA bus attach code).

Should the detach function just unmap the bus space or is something more 
required? How would I compile the driver as a module to test this??? In the 
past I could find little information on how to do this.

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