Intel SL3VS - Celeron 633 MHz Processor Specification page 96

Specification update
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®
INTEL
CELERON® PROCESSOR SPECIFICATION UPDATE
C15.
DAA—Decimal Adjust AL after Addition
The Intel Architecture Software Developer's Manual, Vol 2: Instruction Set Reference page 3-173
currently states:
Operation
IF (((AL AND 0FH) > 9) or AF = 1)
THEN
AL ← A L + 6;
CF ←CF OR CarryFromLastAddition; (* CF OR carry from AL ←AL + 6 *)
AF ←1;
ELSE
AF ←0;
FI;
IF ((AL AND F0H) > 90H) or CF = 1)
THEN
AL ←AL + 60H;
CF ←1;
ELSE
CF ←0;
FI;
It should state:
Operation
old_AL ← AL;
old_CF ← CF;
CF ← 0;
IF (((AL AND 0FH) > 9) or AF = 1)
THEN
AL ← A L + 6;
CF ←old_CF or (Carry from AL ←AL + 6);
AF ←1;
ELSE
AF ←0;
FI;
IF ((old_AL > 99H) or (old_CF = 1)
THEN
AL ←AL + 60H;
CF ←1;
ELSE
CF ←0;
FI;
88

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