Topic       : MC56001 Documentation
Author      : JAY Software
Version     : 1.0 (19/11/1997)
Subject     : Programming/Assembler
Nodes       : 152
Index Size  : 4106
HCP-Version : 4
Compiled on : Atari
@charset    : atarist
@lang       : 
@default    : 
@help       : 
@options    : -i +y +z -t4
@width      : 100
View Ref-FileTST                     Test Accumulator

Operation:
    S - 0               (parallel move)

Assembler Syntax:
    TST S               (parallel move)

Description:
    Compare the specified source accumulator S with zero and set the
condition codes accordingly. No result is stored although the condition
codes are updated.

Condition Codes:

     15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
    +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
    |LF|**| T|**|S1|S0|I1|I0|**| L| E| U| N| Z| V| C|
    +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
    |<-           MR         ->|<-       CCR      ->|

    L- Set if data limiting has occured during parallel move
    E- Set if the signed integer portion of A or B result is in use
    U- Set if A or B result is unnormalized
    N- Set if bit 55 of A or B result is set
    Z- Set if A or B result equals zero
    V- Always cleared

NOTE: The definition of the E and U bits varies according to the scaling
mode being used.

Instruction Format:
    TST S

    S = (A,B)

Timing:     2 + mv oscillator clock cycles

Memory:     1 + mv program words