HP 5384A Service Manual

~ HP 5384A and HP 5385A
a Ope<ation and Pmg<amming
EXAMPLE 2. READING STATUS BYTE
The following example reads the status byte of the HP 5384A/HP 5385A by a serial poll at address 03. The value
returned is input into "A". The program first displays the status byte prior to the error condition. After the error
condition is generated by sending an illegal command "FUS", the program again displays the status byte of a
different
value.
PROGRAM
10 REM Example #2: READING STATUS BYTE "TAR2"
20 S=703
30 CLEAR al DISP USING "3/"
40 OUTPUT S ;"SMS"
50 A=SPOLL(S)
60 DISP "The value of the status byte prior to the error condition is"
70 DISP "equal to";A;"."
80 DISP
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90 DISP "Press 'CONT' to generate an SRQ and alter the status byte value."
100 DISP @ PAUSE
110 BEEP
120 OUTPUT S ;"FUS"
130 A=SPOLL(S)
140 DISP "The value of the status byte after the error condition is"
150 DISP "equal to";A;"."
160 END
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Line 130
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line 150
line 160
3-20
PROGRAM DESCRIPTION
Remarks; comments only, does not affect the program.
Set "S" = to 703.
Clears the controller display only and the cursor skips three lines. The reason for skipping 3 lines is
simply to bring the cursor near the middle of the display screen.
Send service request mask to HP 5384/HP 5385 at address equal to "S" for error or failure condition or
data ready condition.
Read status of HP 5384A/HP 5385A (into A) by a serial poll at address equal to "S".
Display
message within quotes.
Display message within quotes and the status byte.
Skip
one line on controller screen.
Display message within quotes.
Skip one line on controller screen and halt program execution until user presses "CONT".
Beep.
Output "FUS" command to HP 5384A/HP 5385A at address "S" ("FUS" will generate an error
condition).
Read the status of HP 5384A/HP 5385A (into A) by a serial poll at address "S".
Display
message within quotes.
Display message within quotes and status byte.
End
program execution.
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HP 5384A Specifications

General

Brand	HP
Model	5384A
Category	Cash Counter
Language	English