SUB

SUB R[x], R[y], R[z] - Substraction without Carry

Operating Mode

R[x] := R[y] - R[z]

PC := PC + 1

Description

Substracts R[z] from R[y] and writes result to Register R[x].

Status Register

Carry - Bit := 1 if R[y] - R[z] < 0

Zero - Bit := 1 if result = 0

Binary Command

15 14 13 12 11	10 9 8	7 6	5 4 3	2 1 0
00110	Adr(x)	--	Adr(y)	Adr(z)

Example

SUB R[3], R[6],R[4]

15 14 13 12 11	10 9 8	7 6	5 4 3	2 1 0
00110	011	--	110	100

Note
Arithmetic and Logical Commands always affect the Status Bits Carry and Zero.