Extended Arithmetic Element

The KE11-A Extended Arithmetic Element is an optional device for PDP-11 systems that performs high-speed hardware arithmetic operations. This manual covers the following topics:

• General Description: Explains the purpose of the KE11-A in augmenting PDP-11 performance for multiplication, division, and shifting.
• Programming: Details the registers (Multiplier Quotient, Accumulator, Step Counter, Status Register, X Register) and how to address them via Unibus.
• Theory of Operation: Describes the algorithms used for 2's complement notation, multiplication, division, normalization, and shifting.
• General and Detailed Hardware Description: Provides functional and logic-level descriptions of the KE11-A modules (Clock and States, Register Control, and Registers).
• Maintenance: Offers guidance on testing the hardware using diagnostic programs and specific maintenance modules.