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CONTROL REGISTERS S3C9228/P9228
4-8
FLAGS — System Flags Register D5H
Bit Identifier .7 .6 .5 .4 .3 .2 .1 .0
RESETRESET Value
x x x x – – – –
Read/Write
R/W R/W R/W R/W – – – –
.7 Carry Flag (C)
0
Operation does not generate a carry or borrow condition
.6 Zero Flag (Z)
0
Operation result is a non-zero value
1
Operation result is zero
.5 Sign Flag (S)
0
Operation generates a positive number (MSB = "0")
1
Operation generates a negative number (MSB = "1")
.4 Overflow Flag (V)
0
Operation result is ≤ +127 or ≥ –128
1
Operation result is ≥ +127 or ≤ –128
.3-.0
Not used for S3C9228/P9228