law@udel.EDU (Jeff Law) (08/29/89)
A while back i can into possession of several 9836U systems. In a desire to run 4.3BSD i found that i have to use a 9920U cpu in my 9836box. I have talked to some people inside HP who said the 9836U and 9920U have the same CPU and MMU. I have decided this is quite impossible for the following reasons: 1) i can not take the cpu from the 9836U and put it on the 9920U board and use it 2) when i do #1 the 4.0 bootroms say that i have a 68000 processor, when i use the cpu provided on the 9920U cpu it says i have a 68010 processor So what gives?? I read a while back in one of the old HP books that the 9920U and 9836U had the same cpu, but from what i have seen it isnt so! can someone please clarify this for me? Jeff -- University of Delaware PHONE: (302)-451-8005 or (302)-451-6339 ARPA: law@udel.EDU, UUCP: ...!<your_favorite_arpa_gateway>!udel.edu!law
djw@hpldsla.HP.COM (09/16/89)
> to run 4.3BSD i found that i have to use a 9920U cpu in my 9836box. I > have talked to some people inside HP who said the 9836U and 9920U have > the same CPU and MMU. I have decided this is quite impossible for the > following reasons: > > 1) i can not take the cpu from the 9836U and put it on the 9920U board and > use it > 2) when i do #1 the 4.0 bootroms say that i have a 68000 processor, when i > use the cpu provided on the 9920U cpu it says i have a 68010 processor > So what gives??... The original 9920 board had a 68000. It was the same board as the 9836 (I think). When the HP300 (680[123]0 based) series came out, an upgrade board was made available to turn the 9920(/9836 maybe - don't know) into a 68010. It sounds like your 9920 was upgraded to a 68010 processor. What does the chip's label say?? The newer board will be a 68010 or 68040. I think the relevant board numbers are 09826-66517 (old) and 09836-66512 (new). I don't believe either configurations of the 9920 is supported by any current HP-UX. I can't speak for the 4.3BSD OS you want to run. That's all I can remember from this (it's all about 4 years ago). The papers I have on this are going yellow with age :-) Hope it helps. djw NOTE: THIS IS NOT A STATEMENT OF HEWLETT-PACKARD COMPANY.