ST20CX View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

ST20CX

Instruction Set Reference Manual

STMicroelectronics 

dup

dup

duplicate top of stack

Code: 25 FA

Description: Duplicate the top of the integer stack.

Definition:

Areg′ ← Areg

Breg′ ← Areg

Creg′ ← Breg

Error signals: none

Comments:

Secondary instruction.

See also: pop rev

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