Samsung 8-Bit User Manual Page 280

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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
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