Toru Nishimura wrote:

> >> 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
another:
	   5000/260        0x00008002

This machine was netbooted, so 0x00080000 (IOASIC_INTR_SCSI_PTR_LOAD)
isn't set.

> >
> > 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?
> 
> 	KN03_INTR_PROD_JUMPER
> 
> Sorry for my poverty of imagination.  I will yield it with better one.

So I'll guess that a 5900/240 would not set that bit.  I'll add some
code to dec_3maxplus.c to get the model name right.

According to the Ultrix 4.4 SPD (Software Product Description), the
"correct" names for these machines are:

	DECsystem 5900
	DECsystem 5900-260

Ultrix (from memory) lists them as:

	DECsystem 5900
	DECsystem 5900 60MHz processor

and I've been calling the latter a 5900/60 for ages.  I'll go with the
SPD names for now...

Simon.