Asynchronous Terminals and Printer Processes Programming Manual

CONTENTS
Transfer Termination When Reading ......................... 3-7
ATP6100 Operational Examples .............................. 3-8
Conversational Mode ..................................... 3-8
Page Mode ............................................... 3-9
Mode Switching ......................................... 3-11
Pseudopolling .......................................... 3-12
SECTION 4. TERMINAL PROGRAMMING CONSIDERATIONS ............. 4-1
Terminal Modes ............................................ 4-1
Conversational Mode ..................................... 4-3
Page Mode ............................................... 4-8
Break Handling ........................................... 4-14
Using Break (Single Process per Terminal) .............. 4-15
Using Break (Multiple Processes per Terminal) .......... 4-17
Terminal and File Access Types ......................... 4-19
Communicating With Terminals Through Modems .............. 4-24
Types of Modems ........................................ 4-25
Modem Connections ...................................... 4-25
Error Recovery ........................................... 4-27
Programming Errors ..................................... 4-27
System Resource and Hardware Problems .................. 4-27
Device Down or Link Down ............................... 4-28
Operation Timed Out ................................... 4-28
Break Errors ........................................... 4-28
Preempted by Operator Error ............................ 4-29
Modem Error ............................................ 4-30
Path Errors ............................................ 4-30
SECTION 5. PRINTER I/O ..................................... 5-1
Comparison of ATP6100 and SERIALPRINTPROCESS .............. 5-1
Supported Printers ........................................ 5-4
Printer Characteristics ................................... 5-4
Control Characters ...................................... 5-5
Flow Control Characteristics ............................ 5-5
Form Control Characteristics ............................ 5-7
Line-Configuration Characteristics ...................... 5-9
Modem Characteristics .................................. 5-12
SECTION 6. PROCEDURE CALLS FOR ACCESSING PRINTERS .......... 6-1
Procedure Calls Summary ................................... 6-1
OPEN ...................................................... 6-2
WRITE ..................................................... 6-2
SECTION 7. PRINTER PROGRAMMING CONSIDERATIONS .............. 7-1
Printer Feature Comparison ................................ 7-2
Form Control .............................................. 7-3
Top of Form ............................................. 7-3
Overprinting ............................................ 7-3
Programming Considerations for the Model 5508 Printer ..... 7-4
Programming Considerations for the Model 5520 Printer ..... 7-5
Using the DAVFU ......................................... 7-6
Initializing the DAVFU .................................. 7-6
Loading the DAVFU ....................................... 7-7
vi November 1987