257
Comparison Instructions Section 5-18
limit LL and upper limit UL and outputs the result to the GR, EQ, and LE flags
in the SR area. The resulting flag status is shown in the following table.
Precautions Placing other instructions between ZCP(––) and the operation which
accesses the EQ, LE, and GR flags may change the status of these flags. Be
sure to access them before the desired status is changed.
Flags ER: Indirectly addressed DM word is non-existent. (Content of *DM word
is not BCD, or the DM area boundary has been exceeded.)
LL is greater than UL.
EQ: ON if LL
≤ CD ≤ UL
LE: ON if CD < LL.
GR: ON if CD > UL.
Example In the following example, the content of IR 002 (#6FA4) is compared to the
range #0010 to #AB1F. Since #0010
≤ #6FA4 ≤ #AB1F, the EQ flag and IR
10001 are turned ON.
Comparison result Flag status
GR (SR 25505) EQ (SR 25506) LE (SR 25507)
CD < LL 0 0 1
LL ≤ CD ≤ UL 010
UL < CD 1 0 0
ZCP(––)
#0010
002
00000
25505
10000
25507
10002
TR
0
25506
10001
Greater Than
(above range)
Equal
(within range)
Less Than
(below range)
Address
Instruction
Operands Address Instruction Operands
00000 LD 00000
00001 OUT TR 0
00002 ZCP(––)
002
#0010
# AB1F
00003 AND 25505
00004 OUT 10000
00005 LD TR 0
00006 AND 25506
00007 OUT 10001
00008 LD TR 0
00009 AND 25507
00010 OUT 10002
#AB1F
UL: #AB1F
AB 1 F
<
CD: 002
6F A 4
<
LL: #0010
00 1 0
10000: OFF
10001: ON
10002: OFF
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