SBB

SBB - Subtract with Borrow

Subtracts the source from the destination, and subtracts 1 extra if the Carry Flag is set.

Results are returned in “dest”.

Usage:

	SBB	Dest,Src	

Modifies flags:

AF CF OF SF PF ZF

286+ only 386+ only

Clocks Size
Operands 808x 286 386 486 Bytes
reg,reg 3 2 2 1 2
mem,reg 16+AE 7 7 3 2-4 (W88=24+EA)
reg,mem 9+EA 7 6 2 2-4 (W88=13+EA)
reg,immed 4 3 2 1 3-4
mem,immed 17+EA 3 2 1 3-6 (W88=23+EA)
accum,immed 4 3 2 1 3