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A-13
INSTRUCTION SET REFERENCE
DI DISABLE INTERRUPTS. Disables
interrupts. Interrupt calls cannot occur after
this instruction.
Interrupt Enable (PSW.1)
← 0
DI
(11111010)
PSW Flag Settings
ZNCVVTST
——————
DIV DIVIDE INTEGERS. Divides the contents of
the destination long-integer operand by the
contents of the source integer word operand,
using signed arithmetic. It stores the quotient
into the low-order word of the destination
(i.e., the word with the lower address) and the
remainder into the high-order word. The
following two statements are performed
concurrently.
(low word DEST)
← (DEST) / (SRC)
(high word DEST)
← (DEST) MOD (SRC)
DEST, SRC
DIV lreg, waop
(11111110) (100011aa) (waop) (lreg)
PSW Flag Settings
ZNCVVTST
———✓ ↑—
DIVB DIVIDE SHORT-INTEGERS. Divides the
contents of the destination integer operand
by the contents of the source short-integer
operand, using signed arithmetic. It stores the
quotient into the low-order byte of the
destination (i.e., the word with the lower
address) and the remainder into the high-
order byte. The following two statements are
performed concurrently.
(low byte DEST)
← (DEST) / (SRC)
(high byte DEST)
← (DEST) MOD (SRC)
DEST, SRC
DIVB wreg, baop
(11111110) (100111aa) (baop) (wreg)
PSW Flag Settings
ZNCVVTST
———✓ ↑—
Table A-6. Instruction Set (Continued)
Mnemonic Operation Instruction Format