On 09/12/2014 07:55, G?ran Axelsson wrote:
  Another computer with similar SIP hybrides is the
ND-5000 and they are
 found on several places in the CPU, for instance in the
   - MMU, 
http://sintran.com/sintran/hardware/nd-5000/nd-324701.html
   - ALU 
http://sintran.com/sintran/hardware/nd-5000/nd-324704.html
   - Micro program instruction controller
 
http://sintran.com/sintran/hardware/nd-5000/nd-324709.html
 My guess is that they are fast memory modules 
Maybe, but SIPPs (as I've usually seen them called, to distinguish them
 from SIPs: see below) are just SIMMs that have pins.
They were once  
moderately common in 256K and 1M sizes and I've seen a number of
286/386-era PCs that used them.  I have a few here (SIPPs, not the PCs),
and a couple of MXV11-Bs.  They're no faster than common SIMMs of the
same vintage.
There's also a once-common type of chip - most commonly memory chips -
that are SIP (not SIPP) packages as opposed to DIP packages.  I have a
few machines that use those, too.
--
Pete