Hardware And Software Requirements; Installation; Features And Capabilities; Emulated Ibm Features And Capabilities - Texas Instruments 990 User Manual

• Transmission of data
• Reception of data
• Use· of special features
The Emulator maintains a log of the transactions that occur during the communication session. The
log can be maintained on the operator console, a file, or a device, depending on the environment.
When all desired transmissions and receptions have taken place, the Emulator is terminated and the
communication session ends.
1.6 HARDWARE AND SOFTWARE REQUIREMENTS
Appendix A and Appendix B outline the hardware and software requirements, respectively, for the
operation of the Emulator. ·
J.7 INSTALLATION
Standard or user-defined default values are set for use during Emulator operation at the time the
Emulator is installed. These values determine the defaults for:
• Timeout lengths
• Retry counts
Features enabled or disabled
• Block sizes
• Record sizes
If the standard default values are not appropriate for your application, they can be modified during
installation. The installation procedures and a table of the standard values are in Appendix C.
1.8 FEATURES AND CAPABILITIES.
The following briefly describes the IBM features and capabilities emulated by the Emulator, the
features and capabilities unique to the Emulator, and the IBM features and capabilities not emulated
by the Emulator.
1.8.l EMULATED IBM FEATURES AND CAPABILITIES.
• Code Structure - EBCDIC.
• Data Link Control - Binary Synchronous Communications (BSC) Procedures control
point-to-point data exchanges.
• Switched Network Control - The Emulator can automatically answer or disconnect
when the communication line is attached to a switched (dial-up} network and is attached
with an appropriate auto-answer modem.
• Conversational Mode (3780 Emulator Users Only) - The Emulator can accept data from
a host system as a positive acknowledgement to the last block of a transmitted message.
• Extended Enquiry Retry_ - The Emulator can retry a bid for the communication line an
infinite number of times.
1-3
Digital Systems Group