The 8-bit Shifter uses two of these 4-input MUX's to output either the MSB or LSB, shifted left, right, or without a shift. A four input MUX is needed because the shifter can shift through the carry, or without the carry bit.

Schematic Drawing

OSU8: Simple 8-Bit Microprocessor Design; Paul Stoffregen
http://www.pjrc.com/tech/osu8/sch/my_mux4_shifter.html
Last updated: February 24, 2005
Status: These pages are a work-in-progress
Comments, Suggestions: <paul@pjrc.com>