Using the 166Bug Debugger

Note

In commands with RANGE specified as ADDR DEL ADDR, and with size option W or L chosen, data at the second (ending) address is acted on only if the second address is a proper boundary for a word or longword, respectively.

Offset Registers

4

 

 

 

Eight pseudo-registers (R0 through R7) called offset registers are used to

 

 

 

 

 

 

 

 

simplify the debugging of relocatable and position-independent modules.

 

 

 

 

The listing files in these types of programs usually start at an address

 

 

 

 

(normally 0) that is not the one at which they are loaded, so it is harder to

 

 

 

 

correlate addresses in the listing with addresses in the loaded program. The

 

 

 

 

offset registers solve this problem by taking into account this difference and

 

 

 

 

forcing the display of addresses in a relative address+offset format. Offset

 

 

 

 

registers have adjustable ranges and may even have overlapping ranges. The

 

 

 

 

range for each offset register is set by two addresses: base and top. Specifying

 

 

 

 

the base and top addresses for an offset register sets its range. In the event that

 

 

 

 

an address falls in two or more offset registers’ ranges, the one that yields the

 

 

 

 

least offset is chosen.

 

 

 

 

 

Relative addresses are limited to 1MB (5 digits), regardless

 

N

ote

 

 

 

of the range of the closest offset register.

 

 

 

 

 

4-6

MVME166 Single Board Computer Installation Guide

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Image 76
Motorola MVME166D2, MVME166IG/D2 manual Offset Registers, Range of the closest offset register
Page 75 Page 77

MVME166IG, MVME166D2, MVME166IG/D2 specifications

The Motorola MVME166IG/D2 is a pioneering embedded computer designed for high-performance applications in industrial and telecom sectors. This versatile computing platform is based on the PowerPC architecture, which ensures efficient processing capabilities and transfer of data, making it suitable for a wide range of applications, including real-time control, data acquisition, and system monitoring.

One of the main features of the MVME166IG/D2 is its powerful processor. The system is equipped with a PowerPC 603e processor, which offers a remarkable performance rate with a clock speed of up to 250 MHz. This high-speed processing capability allows for rapid data handling and processing, which is critical for demanding applications in real-time environments.

The MVME166IG/D2 also stands out due to its modular design. It supports multiple expansion slots that make it adaptable for different user needs. The system can accommodate additional cards or memory modules, allowing for increased versatility and capability in various operational scenarios.

In terms of connectivity, this embedded computer includes multiple communication interfaces such as Ethernet and serial ports, which facilitate seamless data transfer and communication within larger systems. This connectivity is crucial for integrating the device into existing industrial networks or for connecting with sensors and other equipment.

Another noteworthy characteristic of the MVME166IG/D2 is its robust build quality, which is essential for operation in challenging environments. The device is designed to endure high levels of shock and vibration, making it suitable for deployment in applications such as transportation or heavy machinery.

Additionally, the MVME166IG/D2 offers a range of software support which includes various real-time operating systems. This compatibility allows developers to choose the OS that best fits their application's requirements, enhancing the overall utility of the system.

In summary, the Motorola MVME166IG/D2 is a powerful, flexible embedded computing solution that excels in performance, modularity, and reliability. Its advanced features and durable design make it an ideal choice for industries that require precision, speed, and robustness in their computing solutions.
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