Hp's Emulation Of The 3276/8; Using Your Terminal In An Ibm Environment; Host Operating Systems - HP 262SA Reference Manual

3276/78 Emulation Mode
The following eight models of the 3276 are available:
• Models 1 and 11 provide a 960-character display
• Models 2 and 12 provide a 1920-character display
• Models 3 and 13 provide a 2560-character display
• Models 4 and 14 provide a 3440-character display
Besides the noted differences in display sizes, the models are separated by their standard line
protocols. Models 1 through 4 support Binary Synchronous Communications (BSC), whereas
models 11 through 14 support Synchronous Data Link Control (SDLC). An optional
SDLCIBSC Switch allows models 1-4 to function with either line protocol.
The 3278 Display Station is available in 5 models varying in character display sizes from 960
characters (Model 1) to 3654 characters (Model 5). Models 2, 3, and 4 have the same size
displays as the corresponding model number of the 3276. When the 3278 attaches to a 3276,
the display character capacity of the 3278 cannot exceed the display capacity of the 3276.
The 3276 Control Unit offers support for the IBM 3287 and IBM 3289 printers.
HP'S EMULATION OF THE 3276/78
With the optional integral printer installed, the HP 2625A can function as all three basic
components of the 3270 Information Display System.
As the HP 2625A operates with BSC protocol and supports screen sizes of 1920, 2560, and
3440 characters, it appears to a host application program as a model 2, 3, or 4 of the 3276.
Different cabling requirements established by IBM and HP prevent you, however, from
connecting a 3278 Display Station or an IBM printer to your terminal. However, you may
daisy-chain up to 31 additional HP 2625A's from the first 2625A terminal within a modem
drop line.
USING YOUR TERMINAL IN AN IBM ENVIRONMENT
In ffiM applications, your terminal operates as an IBM 3276 Control Unit/3278 Display
Station. It connects to a host computer through a remote bisynchronous connection. There-
fore, the HP 2625A matches the performance of a remote 3276. It cannot duplicate the speed
of a channel attached control unit. For a group of terminals, the first HP 2625A must be
connected to a modem (or modem bypass cable). Subsequent terminals connect to the first in
daisy-chain fashion.
Host Operating Systems
The host computer may be running with one of the following access methods:
• Virtual Telecommunications Access Method (VTAM)
• Basic Telecommunications Access Method (BTAM)
• Telecommunications Access Method (TCAM)
The Advanced Telecommunication Function (ACF) versions are supported for VTAM
(ACFIVTAM) and for TCAM (ACTITCAM).
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