60
ASCII Interface Module (AS311)
Appendix
A.1 Specification of the READ instruction
FUN 237 Special module data read (READ)
Reads designated range of data from the special module.
Input Execution output
[ A READ B → C ]
Function
• This instruction reads data from the buffer memory of the special module that is
designated by operand A, and stores them in T3’s registers starting with operand C.
• The transfer source address (buffer memory
address) is designated by operand B.
• The transfer size (number of words) is
designated by operand B+1.
Operand
Index
Constant
Device
Register
Opr Name
X Y S L R Z T. C. I O XW YW SW LW RW W T C D F IW O
W
I J K
A Special
module
√ √
√ √
B Transfer
parameter
√ √ √ √ √ √ √ √ √ √
C Top register
of destination
√ √ √ √ √ √ √ √ √
√
Program example
R0000
[ XW000 READ RW010 → D0100 ]
• When R0000 is ON, the buffer memory data of the size indicated by RW011, starting with the
address indicated by RW010 of the special module allocated to XW000, are read and stored in
D0100 and after.
• The maximum number of words to be read is 256 words.
XW000 special module T3
RW010 20
Buffer memory RW011 16
20 1234 READ D0100 1234
35 5678 16 words D0115 5678
Input Action Output ERF
OFF No execution OFF
ON Normal execution ON
Error (see Note 2) ON ON
