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On Time RTOS-32 Documentation

Welcome

RTTarget-32

RTKernel-32

RTKernel-32 Programming Manual

Introduction

Multitasking, Real-Time, and RTKernel-32

Module RTKernel-32

Alternate APIs for RTKernel-32

Supplemental Modules

RTKernel-32 Drivers

System Interface

Interrupt Handling

Kernel Clock

High Resolution Timer

Floating Point

Memory Management

Source Code Positions

CPU

Driver CPU386F

Driver CPU386

Overview of all Drivers

Preconfigured Driver Library Drvrt32.lib

Demo Programs

Advanced Topics

Typical Error Sources

Error and Information Messages

RTKernel-32 Reference Manual

RTFiles-32

RTIP-32

RTPEG-32

RTUSB-32
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Driver CPU386F

CPU386F is the flat address CPU driver. It assumes the program is running in a completely flat address environment. In particular, interrupt handlers do not save, restore, or reload any segment registers. While this driver delivers very good performance and low interrupt latencies, it can only be used if no code interruptible by hardware interrupts modifies any of the segment registers DS, ES, FS, or SS. This is the case for compiler-generated code and all assembler modules included with On Time RTOS-32. If this rule is violated by any application code, sporadic and difficult to debug program crashes can be expected.

Requirements: Intel 386 or compatible CPU (32-bit protected mode only), no segment register changes.

LeftCPU

DownDriver CPU386

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