Careful. Some PDP-11 memory is also 18 bits wide... 16 bits plus two
parity bits.
Johnny
On 2015-12-08 13:03, Pontus Pihlgren wrote:
I've seen a memory assembly from a PDP-15 and it looks very much like
this. Also, if each connector pair corresponds to one bit it adds up to
18 which matches the word lenght of a PDP-15.
Of course, PDP-1, -4 and -7 used 18 bit word lenght, but they were not
made with flip-chips.
PDP-9 is made with flipchips and is 18 bit. But I seeem to recall it's
memory looks quite different.
/P
On Tue, Dec 08, 2015 at 11:58:07AM +0100, Jörg Hoppe wrote:
I help cleaning out a large repository of DEC parts.
There a quantity of DEC core module assemblies appeared.
According to PDF docs these must be PDP-15 MM15's, but no labels are on the
boards.
I show/offer some of them at
retrocmp.com/flipchipshop ,
under "core memory"
Can somebody confirm they are MM15's?
Are any PDP-15 running at all?
Thanks,
Joerg
