Fond memories of POKEing hand-assembled Z-80 code (LDIR, baby!) from TRS-80 BASIC...
The original TRS-80 ("Model I"), the TRS-80 Model III, and the TRS-80 Model 4 all used a Z80. https://en.wikipedia.org/wiki/TRS-80
The TRS-80 Color Computer ("CoCo") used the 6909. https://en.wikipedia.org/wiki/TRS-80_Color_Computer
The portable TRS-80 Model 100 used an 8085. https://en.wikipedia.org/wiki/TRS-80_Model_100