Troubleshooting in the Protected-Mode Environment

The PMINFO32.EXE program

Purpose: Run PMINFO.EXE to determine the performance of protected/ real-mode switching and extended memory.

Notes: The time-based measurements made by PMINFO may vary slightly from run to run.

If this error message appears:

DOS/16M error: [17] system software does not follow VCPI or DPMI specifications

check for a statement in your CONFIG.SYS containing NOEMS. If such a statement exists, remove it and reboot your computer.

If the computer is not equipped with extended memory or if none is available for DOS/4GW, the extended-memory measurements do not display.

Other DOS/4GW error messages are in Section A.3, DOS/4G

Error Messages.

Example: The following example shows the output of the PMINFO pro- gram on an 80486 AT-compatible machine running at 33 MHz.

±================================= PMINFO =======================================±

Protected Mode and Extended Memory Performance Measurement ±± 4.45 Copyright (c) Tenberry Software, Inc. 1987 ± 1996

DOS memory

Extended memory

CPU performance equivalent to 33.0 MHz 80486

±±±±±±±±±±

±±±±±±±±±±±±±±±

 

 

640

 

17854

K bytes configured (according to BIOS).

 

640

 

31744

K bytes physically present (SETUP).

 

550

 

17585

K bytes available for DOS/16M programs.

21.6

(0.0)

19.1

(0.5)

 

MB/sec word transfer rate (wait states).

35.4

(0.5)

34.4

(0.5)

 

MB/sec 32±bit transfer rate (wait states).

Overall cpu and memory performance (non±floating point) for typical DOS programs is 7.78 " 0.62 times an 8MHz IBM PC/AT.

Protected/Real switch rate = 18078/sec (55 msec/switch, 33 up + 21 down), DOS/16M switch mode 11 (VCPI).

Troubleshooting DOS Systems

A-3

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Texas Instruments TMS470R1x manual PMINFO32.EXE program, Error Messages

TMS470R1x specifications

The Texas Instruments TMS470R1x series is an advanced family of microcontrollers designed for automotive and industrial applications, renowned for their robust performance, flexibility, and reliable functionality. Built on a 32-bit RISC architecture, this series provides a powerful computing platform, tailored for embedded control systems.

One of the standout features of the TMS470R1x is its high-performance processing capabilities. Operating at clock speeds of up to 120 MHz, these microcontrollers can handle complex calculations and control algorithms efficiently. The TMS470R1x also incorporates a rich set of peripherals, including timers, pulse width modulation (PWM) modules, and communication interfaces like CAN, SPI, and UART. This versatility makes the series suitable for a wide range of applications, from automotive engine control units to industrial automation systems.

Incorporating advanced memory options, the TMS470R1x features Flash memory sizes ranging from 128 KB to 512 KB, along with RAM ranging from 20 KB to 64 KB. This ample memory is crucial for storing firmware and handling multiple data streams in real time. The microcontrollers also support in-system programming, allowing for easy updates and code modifications during the product lifecycle.

The TMS470R1x series is designed with safety in mind. It adheres to ISO 26262 standards, ensuring high levels of functional safety necessary for automotive systems. Features such as redundancy, error correction, and built-in safety mechanisms ensure operations remain reliable even in fault conditions.

Another important characteristic of the TMS470R1x is its low power consumption, making it ideal for battery-operated devices and equipment. The series employs various power management techniques, including low-power sleep modes, enabling manufacturers to optimize their systems without sacrificing performance.

The integrated Debug and Trace capabilities of the TMS470R1x facilitate effective development and troubleshooting. Engineers can debug their applications in real time, significantly reducing time-to-market and enhancing overall product quality.

In summary, the Texas Instruments TMS470R1x microcontroller series offers a powerful and versatile platform for complex automotive and industrial applications. With its high processing speed, extensive memory options, compliance with safety standards, low power consumption, and robust debugging capabilities, the TMS470R1x is a reliable choice for developers seeking to create innovative and efficient embedded systems. These features combine to position the TMS470R1x series as a leading choice in the expanding field of advanced microcontrollers.