24 Sep
2014
24 Sep
'14
3:45 p.m.
Does anyone know offhand what the -15 volt power supply was used for
in a BA11-K pdp11/34 enclosure?
Off the top of my head :
CPU clock generaotr? (Older '11s certainyl needed -15V here)
-ve supply to RS23 2driers
-ve supply to 3-rail DRAMs (4116, etc)
-tony