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Windows Driver Development

Device and Driver Technologies

Bus and Port Drivers

Serial Controller Drivers

Serial Controller Driver Design Guide

Serial.sys and Serenum.sys

Operation of Serenum and Serial

Serenum Filtering of I/O Requests

Enumerating Serenum Devices

Enumerating Legacy COM Ports

External Naming of COM Ports

Opening and Initializing a Serial Device

Opening and Initializing a 16550 UART-Compatible Interface

Sharing a Serial Device Interrupt

Powering Up a Serial Device

Setting Read and Write Timeouts for a Serial Device

Removing a Plug and Play Serial Device on an RS-232 Port

Removing a Plug and Play RS-232 Port

Serial Device Control Requests

Determining Which COM Port a Debugger Uses

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Determining Which COM Port a Debugger Uses

The KdComportInUse global variable contains the memory address that is assigned to the COM port that a kernel debugger uses.

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