795
Basic I/O Unit Instructions Section 3-22
Operand Specifications
Description IORD(222) reads the number of words designated in S+1 from the memory
area of the Special I/O Unit or CPU Bus Unit whose unit number is designated
by S and outputs the data to D. Refer to the operation manual of the Special I/
O Unit or CPU Bus Unit from which data is being read for specific details for
each Unit.
S+1 S
S+1: Leftmost 4 digits
S: Ri
its
Area C S D
CIO Area CIO 0 to
CIO 6143
CIO 0 to
CIO 6142
CIO 0 to
CIO 6143
Work Area W0 to W511 W0 to W510 W0 to W511
Holding Bit Area H0 to H511 H0 to H510 H0 to H511
Auxiliary Bit Area A0 to A959 A0 to A958 A448 to A959
Timer Area T0000 to T4095 T0000 to T4094 T0000 to T4095
Counter Area C0000 to C4095 C0000 to C4094 C0000 to C4095
DM Area D0 to D32767 D0 to D32766 D0 to D32767
Indirect DM addresses
in binary
@ D0 to @ D32767
Indirect DM addresses
in BCD
*D0 to *D32767
Constants #0000 to #FFFF
(binary)
Specified values
only
---
Data Registers DR0 to DR15 ---
Index Registers ---
Indirect addressing
using Index Registers
,IR0 to ,IR15
–2048 to +2047 ,IR0 to –2048 to +2047 ,IR15
DR0 to DR15, IR0 to IR15
,IR0+(++) to ,IR15+(++)
,–(– –)IR0 to, –(– –)IR15
S
S+1
Unit number of Special I/O Unit
or CPU Bus Unit
Desig-
nated
number
of words
read.
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