Zilog EZ80F916 - Manual (Page 107)

eZ80
®
CPU
User Manual
UM007715-0415 CPU Instruction Set
98
Table 42. Register and kk Opcodes for ADD IX/Y, rxy Instruction (hex)
Register kk
BC
09
DE
19
IX/IY
29
(destination is the same as the
source) 
IX
 IX+IX or IY  IY+IY