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ADD4S - Addition for packed BCD strings
CPU: NEC V20/V30
Type of Instruction: User
Instruction: ADD4S
Description:
BCD STRING (ADDRESS=ES:DI,LENGTH=CL) <-
BCD STRING (ADDRESS=DS:SI,LENGTH=CL) +
BCD STRING (ADDRESS=ES:DI,LENGTH=CL);
Note: si,di, other registers not changed
Flags Affected: OF,CF,ZF
;; ZF set if both strings are zeros.
;; CF,OF set as result of operation with most
;; signification BCDs.
CPU mode: RM
+++++++++++++++++++++++
Physical Form:
COP (Code of Operation) : 0FH 20H
Clocks:
ADD4S
NEC V20: ~19*(CL/2)+7
Add by Pancho
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