and Z (zero). Shifter The shifter contains a 32-bit input and output. The output is connected directly to the C bus. The shifter is used to perform logical and arithmetic shift operations, by simply setting respectively the control signal SLL8 (Shift Left Logical) and SRA1 (Shift Right Arithmetic). External links Article about implementing an Mic-1 virtual Machine in VHDL mic1, an open source MIC-1 simulator, including MAL and IJVM assemblers emuMIC open source, free and animated MIC-1 emulator, developed by students of the University of Catania (for Windows, Mac and Linux) Mic1MMV, the MIC-1 simulator included in the 5th edition of "Structured Computer Organization" by Andrew S. Tanenbaum mic1 another open source MIC-1 simulator written by UMass Lowell students, which includes an assembler and microcode compiler Instruction set architectures Educational abstract machines