
11/02/87
Rob Horning

I spent one day helping find bad RAM's on Topgun.  The problem seems to
be under control.

MTC was here to talk about SRAM and DRAM status.  We will continue to work
very closely with them.

I have started to look at the pinouts for the CPU and CMUX chips.  The
biggest problem is that they have not dropped the complemented address
drivers.  When this happens there will be a large pinout change.  This
will not happen until next week.  I am still working on getting an
electronic copy of the PMI pinout.

They are talking about putting the Afterburner chips in a standard PLCC.
We would need twice as many, but they should cost less than five dollars
each.  The biggest problem is cooling the parts.  I am not sure that
we can cool .75 watts in a 28 pin PLCC.  Regardless of the package they will
probably not use true complement drivers.  He wants to use just inverting
drivers.  The true drivers are slower and so this offsets the benefits
of having true-complement drivers.  Having only one kind of driver will
make the layout easier.  The one problem is that you will always need to
use the BJT's on the control lines because you will need the inversion.

I have been working with Bill Jaffe on the definition of the PDH interface.
He would like to put PDC in IO space only.  I am looking into the problems
with doing this.

I designed a test board to verify some of the assumptions that I am making
in the cross-talk modeling.

I got EGS and the new Pascal up on my system with help from Tom and Floyd.

