18 Jun
2011
18 Jun
'11
1:56 p.m.
Hi Bill,
The 11/40 has jumpers on a lot of the basic boards that have to looked
at in relation to the optional boards (KE11-E M7238, KE11-F M7239,
KT11-D M7236, line clock- M787, and stack limit option. Every option
change require changing jumpers. Every memory set has to have the
right starting address and parity jumpers.
One very obvious question at this point :
Do you know if this 11/40 has ever worked in precisely this
configuration?
The likely faults are rather differnet for a machine that has been working
and which one day locks up like this, and for a machine that's may well
have had options or peripherals removed since it last worked.
-tony