Strange i-con Unibus (?) board
Pete Turnbull
pete at dunnington.plus.com
Tue Dec 9 03:01:41 CST 2014
On 09/12/2014 07:55, Göran 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
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