KE11-A Extended Arithmetic Element
- multi-bit shifts
- logical shift
- arithmetic shift
It is implemented as a four-slot system unit (details below).
The KE11-A was originally produced for use with the PDP-11/20, whose KA11 CPU did not have multply, divide, or multi-bit shift operations. As a UNIBUS peripheral, not integrated into the CPU, it was also usable with other models, e.g. the PDP-11/05 and PDP-11/04, which likewise did not implement multiplication in hardware, etc.
The KE11-A can be operated with an optional KM11-A Maintenance Set in order to diagnose faults.
The KE11-A consists of 3 quad boards:
- M7210 Data Control
- M7211 Register Control
- M827 Clock and States
and a pair of M234 Register dual-height boards, plugged into a quad backplane.
These are the board locations for the KE11-A (as seen from the board side of the backplane):
|1||UNIBUS In||M7210 Data Control|
|2||Unused||KM11-A|| M234 Register
| M234 Register|
|Reserved||M7211 Register Control|
|4||UNIBUS Out||M827 Clock & States|
|v • d • e PDP-11 Computers and Peripherals|
| UNIBUS PDP-11s - PDP-11/20 • PDP-11/15 • PDP-11/35 • PDP-11/40 • PDP-11/45 • PDP-11/50 • PDP-11/55 • PDP-11/70 • PDP-11/05 • PDP-11/10 • PDP-11/34 • PDP-11/04 • PDP-11/44 • PDP-11/60 • PDP-11/24 • PDP-11/84 • PDP-11/94
Clones: CM 1420