SNAX/HLS Application Programming Manual

Advanced APS Functions
Application Prototyping and Simulation (APS) System
6–66 104707 Tandem Computers Incorporated
Advanced APS
Functions
In loop-back testing, SNAX/HLS verb dynamics can be shown with simple messages.
However, in testing to IBM devices (for example, 3624) or IBM subsystems (for
example, CICS/IMS), simple messages might not be sufficient to test a total
application. The advanced functions of APS address the needs of this type of testing.
Some devices and IBM subsystems require special Function Management Headers
(FMHs) in front of application data. For example, an APS session to CICS emulating a
3600 device must prefix all data to CICS with a special three-byte FMH (%H030100).
APS screens do not allow such data to be entered unless the Hex subfunction is
entered.
The Hex subfunction is available on SEND-DATA, HLS-CALL-USER, RECEIVE-
DATA, and SEND-AND-RECEIVE-DATA verbs. This subfunction allows the APS
user to enter data in ASCII, EBCDIC, or hexadecimal form.
This subsection reviews the Hex subfunction for each verb listed above.
Function-Key Usage When the Hex screen is displayed, the following function keys are active:
Next (F1) (Display next portion)
Displays the next 80 bytes of the message in text and hexadecimal. If the
message is less than 80 bytes, or the last 80 bytes of the message are on the
screen, the display does not change.
Prev (F2) (Display previous portion)
Displays the previous 80 bytes of the message in text and hexadecimal. If
the message is less than 80 bytes, or the first 80 bytes of the message are on
the screen, the display does not change.
Asc (F3) (ASCII Display Mode)
Sets the text-display mode to ASCII. The message is displayed as ASCII
characters. Unprintable characters are shown as tilde (~) characters. For
request screens, the cursor is positioned into the ASCII character display,
enabling you to enter text in ASCII.
Ebc (F4) (EBCDIC Display Mode)
Sets the text-display mode to EBCDIC. The message is displayed as
EBCDIC characters. Unprintable characters are shown as tilde (~)
characters. For request screens, the cursor is positioned into the EBCDIC
character display, enabling you to enter text in EBCDIC.
Hex (F5) (Enter hexadecimal data)
This is useful only when entering data for send operations. It positions
the cursor into the Hex display, enabling you to enter text directly in
hexadecimal.
Rtn (F14) (Return)
Returns to the original verb display.
Others The other keys displayed are Prnt, Rset, Rcov, and Exit. They act like the
similarly named keys on the main APS screens.