Toshiba T2N - Manual (Page 192)

3.User Data
User's manual 179
Processable numerical ranges and expression formats are shown
in the following Table.
Basically, BCD is a data format used for data inputs from BCD-
output type numerical setting devices and data outputs to BCD-
input type numerical display devices. However, the T2N is provided
with dedicated instructions which execute the 4 arithmetic
calculations on BCD data as they stand.
(4) Unsigned Double-Length Integers
These are 32-bit unsigned integers which are expressed using 2
consecutive registers. In the case of double-length data, the
registers are designated in the form A + 1 • A . A indicates
the lower 16 bits and A + 1 shows the upper 16 bits. ( A + 1 is
the register following register A )
Example) When processing a Unsigned double-length integer in
double length register D0201•D0200, D0200 becomes A and
D0201 becomes A +1. D0200 becomes the lower side and
D0201 becomes the upper side.
In programming, when D0200 is entered in the position which
designates the instruction double-length operand, D0201•D0200
is automatically displayed.
The numerical value range in which unsigned double-length integers
can be processed is shown in the Table on the following page.
NOTE
▼ ▼
▼
Bit positions
Register A = Lower 16 bits
Register A +1 = Upper 16 bits
(MSB) (LSB)
F – – – – – – 0 F – – – – – – 0
Numerical Value
(Decimal)
Binary Expression
Hexadecimal
Expression
9999 1001 1001 1001 1001 9999
9998 1001 1001 1001 1000 9998
∫ ∫ ∫
10 0000 0000 0001 0000 0010
9 0000 0000 0000 1001 0009
∫ ∫ ∫
1 0000 0000 0000 0001 0001
0 0000 0000 0000 0000 0000