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The instruction set of the PDP-11 was designed towards a clean, general, symmetric Additionally, on most implementations of the PDP-11 architecture, theprior knowledge of MACR0-11 is required, the user should be' familiar with the PDP-11 processor addressing modes and instruction set. This manual presents The instruction set provided a number of double-operand instructions: MOV; ADD; SUB; BIT (bit test); BIS (bit set); BIC (bit clear). The PDP-11 architecture is an instruction set architecture (ISA) developed by Digital Equipment Corporation (DEC). It is implemented by central processing units (CPUs) and microprocessors used in PDP-11 minicomputers. 1 Feb 2019 The PDP-II is a family of upward-compatible computer systems. notatian, and theory af computers coiled the Instruction Set Processor (ISP). These provisions enable the PDP-11 to perform as either a word or byte processor. The numbering scheme for word and byte addresses in memory is: Byte instructions are specified by setting bit 15. Thus, in the case of the MOV instruction, bit 15 is 0; whin bit 15 is set, the mnemonic is MOVB. 3 Aug 2011 Each PDP-11 machine language instruction has a length of 16 bits (1 word) and is always located at an even memory location. The flow of execution of a program is managed by the Program Counter (PC) register. This register stores the 16 bit address of the next instruction that is to be executed. The addressing modes and the instruction set of the PDP-11 processor will be discussed in detail in Chapters 3 and 4. 'Ganeral Registers-The. KAll processor PDP-11 Tutorial. It embraced the 8-bit byte and used the ASCII character set. The general format of a PDP-11 machine instruction with one op code and two