Ben Eater's 8-Bit Computer project calls for 8 "4-bit D-type register". Is it ok to use the CMOS version, the CD4076BMTE4?http://bg-electronics.de/datenblaetter/Schaltkreise/CD4076B.pdf
I have heard that sometimes the voltage varies too much. The orignal design asks for the 74LS173. http://www.ti.com/lit/ds/symlink/sn54173.pdf
Also, can you use a bidirectional register, like the 74S194, and set it to go one way? http://www.ti.com/product/SN74LS194A
Lastly, can an 8 bit shift register IC, like the 74hc595, be used with four bits or does the chip require 8 bits to work properly?
Sorry, for asking so many questions at once.