Intel 8XC196NT User Manual page 437

8XC196NT USER'S MANUAL
Mnemonic
LDB LOAD BYTE. Loads the value of the source
byte operand into the destination operand.
(DEST)
Z
—
LDBSE LOAD BYTE SIGN-EXTENDED. Sign-
extends the value of the source short-
integer operand and loads it into the
destination integer operand.
(low byte DEST)
if DEST.15 = 1 then
(high word DEST)
else
(high word DEST)
end_if
Z
—
LDBZE LOAD BYTE ZERO-EXTENDED. Zero-
extends the value of the source byte operand
and loads it into the destination word
operand.
(low byte DEST)
(high byte DEST)
Z
—
LJMP LONG JUMP. Adds to the program counter
the offset between the end of this instruction
and the target label, effecting the jump. The
offset must be in the range of –32,768 to
+32,767.
64-Kbyte mode:
←
PC PC + 16-bit disp
1-Mbyte mode:
←
PC PC + 24-bit disp
Z
—
A-28
Table A-6. Instruction Set (Continued)
Operation
←
(SRC)
PSW Flag Settings
N C V VT
— — — —
←
(SRC)
←
0FFH
←
0
PSW Flag Settings
N C V VT
— — — —
←
(SRC)
←
0
PSW Flag Settings
N C V VT
— — — —
PSW Flag Settings
N C V VT
— — — —
Instruction Format
DEST, SRC
LDB breg, baop
(101100aa) (baop) (breg)
ST
—
DEST, SRC
LDBSE wreg, baop
(101111aa) (baop) (wreg)
ST
—
DEST, SRC
LDBZE wreg, baop
(101011aa) (baop) (wreg)
ST
—
LJMP cadd
(11100111) (disp-low) (disp-high)
NOTE: The displacement (disp) is sign-
extended to 24 bits in the 1-Mbyte
addressing mode. This displace-
ment may cause the program
counter to cross a page boundary.
ST
?