CPGuide - Generic IOCtl Commands

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Control Program Programming Guide and Reference

Introduction to the Control Program Control Program Functions Keyboard Functions Mouse Functions Video Functions Data Types Errors Debugging Kernel Debugger Communications Protocol Device I/O Dynamic Linking Error Management Exception Management Extended Attributes File Management File Names File Systems Generic IOCtl Commands Memory Management Message Management National Language Support Pipes Program Execution Control Queues Semaphores Timers Notices Glossary

Category 01h ASYNC (RS232-C) Control IOCtl Commands

Asynchronous (RS232-C) Communications Physical Device Driver

Hardware Support

           IBM PS/2 Micro Channel Adapter Support
           AT Bus Adapter Support
           Attachment Support
           RS232-C Interface
           Hardware Support for Extended Hardware Buffering
           INS 8250, INS 8250-B Considerations
           Supported Bit Rates on 16450 and Compatibles 

ASYNC (RS232-C) Device Driver Features

           Output Modem Control Signals
           Input Modem Control Signals
           Logical Flow Control (XON/XOFF)
           Support for Extended Hardware Buffering
           Line Characteristics
           Break and Error Processing
           State of the COM Port
           Event Notification 

States of the ASYNC Device Driver

           Automatic Receive Flow Control (XON/XOFF)
           Automatic Transmit Flow Control (XON/XOFF)
           Bit Rate
           Break Replacement Character
           Break Replacement Character Processing
           COM Event WORD and COM Error WORD
           Data Bits
           DTR and RTS
           DTR Control Mode
           Error Replacement Character
           Error Replacement Character Processing
           Extended Hardware Buffering
           Input Sensitivity Using DSR
           Null Stripping
           Output Handshaking Using CTS, DSR, DCD
           Parity
           RTS Control Mode
           Read Timeout State
           Read Timeout Value
           Stop Bits
           Transmit Immediate
           Transmitting Break
           Write Timeout State
           Write Timeout Value
           XON/XOFF Characters 

Reserved Device Names (COM1-n)

           IBM PS/2 (with Micro Channel) Considerations for COM1-4 ====

====Initialization/Resource Management

           Initialization Considerations 

ASYNC Communication Device Driver Interfaces

           File System Requests
               Open Processing
               Close Processing
               Read Processing
               Write Processing 

====Access Authorization

Performance

           Enabling Extended Hardware Buffering