> after remembering what pile the /260 was at the bottom of (i'd love to get
it
> working, but it's dropped way to the bottom of the priorities list):
>
> it's got a single (very large) LSI chip:
>
> LSI
> L1A7710
> 21-37404-01
> DC7268B
> NAC 9343(triangle)

Yeah, DEC probably had one large ASIC made to replace the two on the /240
and to do other stuff for the R4400, which is quite different, 64
Data/Address Lines (R4400) as a opposed to 32 Data/Address Lines (R3000).

I'm guessing bumping up a R3000 to a R4400 is not going to happen unless
some of the 32bit pin packaged R4600 can run only 32bit bus mode (which I
don't think it can)

> as far as removing the CPU's heatsink, it's got two stud/nut combos
holding
> it on (almost like the Sun SuperSPARC CPUs) and if someone says it isn't
also
> glued i'll see if i can dig up a socket that will fit them and attempt to
> remove the heatsink.

Don't know, I WILL NOT advise.

>
> staring at these HUGE memory modules really makes me want to get this
thing
> running.  hmmm, now where did i put those spare SCSI disks.............
>

Yeah, that's what got me to this point, I pulled out my /240 fired it up,
installed 1.5, brought it to work, nfs it to a pkgsrc I had on a machine and
spent a week compiling nedit (few hours), mozilla (2.5 days), icewm and
windowmaker (one evening) and the said to myself "hey, this is some slow
stuff!"  Serriously I think it performs just fine, as long as your not
compling mozilla.  BTW mozilla would run but never displayed a window! :-(

>
> the KN03 is the /240 and the KN05 is the /260 i believe.  this definitely
has
> the mainboard of a /240, don't know if a "true" /260 would look any
differently
> on the inside, although judging from what i know about DEC's thinking and
from
> what i've seen of their hardware they tend to make a few pieces as
possible.
> one mainboard for 5 different CPU daughterboards (i'm gonna take a guess
and
> say this mainboard is also used for the /200??)

Yes, that's my impression.

> just the little bit i have to add to the pot.

Thanks!

jam