Hitachi NJI-350B manual Processing time when n=1, Bcd →, Wm, Tc

Chapter 5 Instruction Specifications

Conversion Classification

number	Ladder symbol
Item
18 BCD(d, s)

19 BIN(d, s)

20 DECO(d, s, n)

21 ENCO(d, s, n)

Instruction symbol

Instruction

name

Binary →

BCD conversion

BCD →

Binary conversion

Decode

Encode

Process descriptions	I/O types used
Converts the value of s into	[Word]
BCD and stores it in I/O	d: WY, WR, WM
number d. If the value of s	s: WX, WY, WR,
is an error, DER (R 7F4) =	WM, TC,
1 is set.	Constant
Converts the value of s into	[Double word]
binary and stores it in I/O	d: DY, DR, DM
number d. If the value of s	s: DX, DY, DR,
is an error, DER (R 7F4) =	DM, Constant
1 is set.
Decodes the value indicated	d: R, M
by the least significant n	s: WX, WY, WR,
bits of s, and sets the bit	WM, TC,
that corresponds to the	Constant
decoding result of the bit	n: Constant(1-8)
row starting from I/O
number d, to 1.
Encodes the bit location in	d: WY, WR, WM
which 1 is set within the bit	s: R, M
row, which starts with I/O	n: Constant(1-8)
number s and lasts for the
amount of nth power of 2,
and stores it in I/O number
d. If multiple bits that
contain 1 exist, the one
with the upper bit locations
will be encoded.

R7F4	R7F3	R7F2	R7F1	R7F0
DER	ERR	SD	V	C
↕	z	z	z	z
↕	z	z	z	z
↕	z	z	z	z
↕	z	z	z	↕

Process

time (∝ s)

MICRO-EH

79

89

49

75

105

128

Steps Remarks

3Upper case: W Lower

4case: DW

3Upper case: W Lower

4case: DW

4 *3

4 *3

*3: Processing time when n=1.

Classification

numberItem

Instruction symbol

DERR7F4

ERRR7F3

R7F2SD

R7F1V

R7F0C

MICRO-EH

Steps

Process

Ladder symbol

Instruction

Process descriptions

I/O types used

time

Remarks

name

(∝ s)

instruction

22

BCU(d, s)

Bit count

Among the contents of s

[Word]

z

z

z

z

z

33

3

Upper

set to 1 in I/O number d.

WM, TC,

case: W

(word, double-word), stores

d: WY, WR, WM

the number of bits that are

s: WX, WY, WR,

Application

Constant

s: DX, DY, DR,

[Double word]

42

4

Lower

d: WY, WR, WM

case: DW

DM, Constant

23

SWAP(d)

Swap

Swaps the upper 8 bits and

d: WY, WR, WM

z

z

z

z

z

25

2

the lower 8 bits of the value

(word) for I/O number d.

24

UNIT(d, s, n)

Unit

Stores the lower 4 bit

d: WY, WR, WM

↕

z

z

z

z

100

4

*4

values of the n words

s: WR, WM

starting with s in the lower

n: Constant(0-4)

4 bits each of d (word).

25

DIST(d, s, n)

Distribute

Extracts the value of s

d: WR, WM

↕

z

z

z

z

87

4

*4

(word) in 4 bit units from

s: WX, WY, WR,

the least significant bits,

WM, TC,

and sets them in the lower 4

Constant

bits of each word starting

n: Constant(0-4)

with I/O number d (word).

The upper bits are set to 0.

*4:

Processing time when n = 1

5-10