HP3000
Bus ness
Servers
Program access is accomplished through use
of a set of intrinsics that are powerful
procedures, which perform the low-level task
of decoding the data streams.
(Table 1 provides a list of available intrinsics.)
The intrinsics can be used with the intrinsics
of other HP 3000 facilities such as
IMAGE/3000, VPLUS/3000, KSAM/3000, or
NS/3000. The high-level, easy-to-use nature
of these intrinsics results in improved
programmer productivity.
Because programmatic mode works by
exchanging information through screen
images, most host applications that have been
written for use with IBM 3270 controllers will
work with SNA IMF/iX with little or no
modification. For customers who are in the
process of changing from centralized to
distributed processing, this feature helps
provide a smooth transition.
The Pass Thru mode of SNA IMF/iX provides
users the capability of using HP 3000 attached
printers and DTC attached terminals for
interactive access to a host computer.
In this mode, SNA IMF/iX users can directly
access host software such as CICS or IMS, or
they can use TSO for program development.
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Table 1. SNA IMF/iX Intrinsics Summary
Intrinsic
Function
ABORT3270
Aborts an outstanding no-wait REC3270 or TRAN3270 request.
ACQUIRE3270
Provides the SNA IMF/iX users the capability to start PASS Thru on an HP 3000 terminal
or printer programmatically.
ATTRLIST
Returns the locations of attribute characters with all or a subsection of a screen.
CLOSE3270
Equivalent to turning off the specified device.
ERR3270
Returns the error message associated with a given intrinsic error number.
EXTFIELDATTR
Returns information about the attribute information of the Double Byte
FIELDATTAR
Returns information about the attributes of the specified field.
IOWAIT3270
Informs the user program that a previous I/O operation has completed.
IODONTWAIT3270
Waits for a previous no-wait I/O request to complete.
OPEN3270
Equivalent to turning on the power of a 3270 Display Station or Printer. It allocates the
internal screen buffer used by SNA IMF/iX.
PRINT3270
Prints a copy of the internal screen image to a spool file.
READFIELD
Reads a field of data from the internal screen buffer and returns the data to an
HP application program.
READSCREEN
Reads all or part of the internal screen buffer and returns this data to the
HP application program.
RECV3270
Allows the user program to receive the screen after modification by the host.
RESET3270
Equivalent to pressing the RESET key on an IBM 3270 Display Station keyboard.
SCREENATTR
Returns information about the attributes of the screen image currently in the internal buffer.
STREAM3270
Equivalent to typing a Series of keystrokes in a 3270 Display Station keyboard. Provides
a mechanism for performing “special function key” operations from the HP application
program. Also allows more than one field of data to be updated in one Intrinsic call.
TRAN3270
Equivalent to pressing a transmit key in the 3277 or 3278 Display Station keyboard.
It causes modified data to be transmitted to the host the next time the host polls the device.
VERS3270
Returns the number if the version of SNA IMF/iX that is being executed in the HP 3000.
WRITEFIELD
Writes data from the HP application program into an unprotected field if the internal
screen buffer.
READSTREAM
Reads all or part of the untranslated host data stream.
WRITESTREAM
Creates the data stream that an HP application program sends to the IBM host.
