Toru Nishimura wrote:

> >> Oh, Simon, I think
> >> I found the way to distinguish DECsystem 5900 from 2{4,6}0.
> >
> > And?  :-) :-)
> 
> Do you have any chance to check a certain bit (0x8000) of IOASIC INTR
> register on 2{4,6}0 and DECsystem5900 after boot?

Here's my results:

	5900/260	0x00080002
	5000/240	0x00088002

So 0x8000 is clear on the 5900/260 and set on the 5000/240.
Unfortunately I don't have a 5000/260 or a 5900/240 to test.

Given that the 5000/260 and 5900/240 tests work, that leaves
one question before code gets added - what do you call 0x8000?

Simon.