SSEM CPU emulator

SSEM is one of the first implementations of the von-Neumann design of a computer. It contained a control unit, arithmetic-logic unit (ALU), and memory (which actually is a CRT display too).

The speed of CPU is around 700 instructions per second.

The ssem-cpu plugin implements the control unit (instruction decoding and executing) and ALU.

Status panel

Status panel is shown below:

Registers section shows hexadecimal, decimal and binary representation of the:

• accumulator (A)
• “control-instruction” (CI), which holds memory address of the current instruction (zero-based program counter)

Memory-snippet shows “actual” memory-cell values (hexadecimal, decimal and binary):

• M[CI]: memory cell value at CI (the current row with the instruction)
• line part (correctly reversed) of the current instruction row
• M[line]: memory cell value at line address