8 Feb
2015
8 Feb
'15
2:41 p.m.
On Sat, Feb 7, 2015 at 11:46 AM, Jacob Ritorto <jacob.ritorto at gmail.com> wrote:
I'm going to duck after asking this, but would
it be at all feasible to
rewire the main 11/45 backplane to get rid of the weird voltages in those
bipolar slots so they'd accommodate normal boards like these?
It's not just "weird voltages". Slots 17-20 and 22-25 are Fastbus, not
Unibus, so they're not
usable for *anything* except 11/45 fastbus memory. Slots 16 and 21,
for the Fastbus
memory controllers, do have Unibus, but I haven't verified that the
pinouts match normal
Unibus slots. They definitely are NOT wired for SPC use.
Fastbus memory could be either:
MS11-B (MOS)
M8110 memory control
G401 or G401-YA MOS memory matrix
MS11-A or -C (bipolar)
M8120 memory control (M8110 in early versions)
M121A-YA bipolar memory, 4K, parity
M8111 bipolar memory, 1K
M8111-YA bipolar memory, 1K, parity