Shift Register Instructions
Chapter 13
137
Figure 13.5
Format
for FIFO LOAD and FIFO UNLOAD Instructions
FIFO
UNLOAD
COUNTER ADDR:
030
FIFO SIZE: 001
NUMBER IN FILE: 000
FILE: 110- 110
INPUT ADDR:
010
INPUT DA
TA: 0000
030
(EN)
17
Numbers
shown are default values. Bold numbers must be replaced by userentered values. The number of default address digits
initially displayed  3, 4, or 5  will depend on the size of the data table. Initially displayed default values are governed by the I/O rack
configuration.
COUNTER ADDRESS
:
Address of the instruction in the accumulated value area of the data table.
FIFO SIZE :
The maximum number of words that the FIFO stack can contain.
NO IN FILE
:
Current number of words in the stack.
FILE :
Starting address of the FIFO stack location.
INPUT ADDRESS
:
Address of input word outisde the stack.
INPUT DA
TA :
Current data at input address.
030
(FL)
15
Numbers shown are default values. Bold numbers must be replaced by userentered values. The number of default address digits
initially displayed  3, 4, or 5  will depend on the size of the data table. Initially displayed default values are governed by the I/O rack
configuration.
COUNTER ADDRESS
:
Address of the instruction in the accumulated value area of the data table.
FIFO SIZE :
The maximum number of words that the FIFO stack can contain.
NO IN FILE
:
Current number of words in the stack.
FILE :
Starting address of the FIFO stack location.
OUTPUT ADDRESS
:
Address of output word outisde the stack.
OUTUT DATA :
Current data at output address.
030
(EM)
14
FIFO
LOAD
COUNTER ADDR:
030
FIFO SIZE: 001
NUMBER IN FILE: 000
FILE: 110- 110
OUTPUT ADDR: 010
OUTPUT DATA: 0000
030
(EN)
16
030
(FL)
15
030
(EM)
14
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