Zilog Z08470 - Manual (Page 203)

UM008007-0715 Z80 Instruction Description
Z80 CPU
User Manual
191
N is set.
C is set if borrow; otherwise, it is reset.
Example
If the HL register pair contains 9999h , register pair DE contains 1111h , and the Carry
flag is set, then upon the execution of a n SBC HL, DE instruction, HL contains 8887h .