iECM-86 COMMANDS

5.3.3Program Execution

These commands start and stop execution of user code. The commands provided are:

GO

GO FOREVER

GO FROM code_addr

GO FROM code_addr FOREVER

GO FROM code_addr TILL code_addr

GO FROM code_addr TILL code_addr OR code_addr

GO TILL code_addr

GO TILL code_addr OR code_addr

HALT

If a GO with breakpoint command is entered, the user code bytes at the breakpoints are saved and INT3s are substituted. When a breakpoint is reached, the user’s software stops before the instruction that caused the breakpoint and the iECM-86 software restores the original user code. Note that this differs from the operation of most ICE modules, which stop just after the instruction executes. A problem associated with stopping before the break instruction executes is that subsequent GO commands may run into the breakpoint before any user code is executed. The iECM-86 avoids this problem by skipping the setting of any breakpoints set on the instruction that the current PC points to. If this happens to remove the last breakpoint set, you are warned, but the GO still executes with no breakpoints enabled. If this happens, you can use the HALT command to stop the program.

None of the GO commands can be executed while the user’s code is already running; the HALT command cannot be executed if the user’s code is not running. The GO commands that set breakpoints use BR[0] and possibly BR[1]. Any break value already in one of these breakpoints is overwritten and destroyed by these GO commands. If possible, the user should reserve the first two breakpoints for use by the GO commands, and set the remaining breakpoints (if required) explicitly with the BR commands.

GO

This command starts execution of the user’s code using the current

 

value of user’s program counter (PC) and the current breakpoint

 

array.

GO FOREVER

This command clears the breakpoint array and starts execution at the

 

current value of the user’s PC.

GO FROM code_addr This command loads the user’s PC with code_addr and starts execution of the user’s code using the current breakpoint array.

5-7

5

Page 56 Page 58
Page 57
Image 57
Intel 80L186EB, 80L188EC, 80L186EC, 80C186EB, 80C188EB, 80L188EB, 80C188EC, 80C186EC user manual Program Execution, GO Forever
Page 56 Page 58

80L188EB, 80C188EC, 80C188EB, 80L186EB, 80C186EB specifications

The Intel 80L188EC, 80C186EC, 80L186EC, 80C186EB, and 80L186EB microprocessors represent a significant evolution in Intel's 16-bit architecture, serving various applications in embedded systems and computing during the late 1980s and early 1990s. These microprocessors are designed to offer a blend of performance, efficiency, and versatility, making them suitable for a range of environments, including industrial control, telecommunications, and personal computing.

The Intel 80L188EC is a member of the 186 family, notable for its low-power consumption and integrated support for a range of peripheral devices. It operates at clock speeds of up to 10 MHz and features a 16-bit architecture, providing a balance of processing power and energy efficiency. The 80C186EC, on the other hand, is a more advanced version, offering enhanced performance metrics with faster clock speeds and improved processing capabilities, making it ideal for applications that require more computational power.

The 80L186EC shares similarities with the 80L188EC but is enhanced further for various low-power applications, especially where battery life is crucial. With a maximum clock speed of 16 MHz, it excels in scenarios demanding energy-efficient processing without sacrificing performance.

In contrast, the 80C186EB and 80L186EB are optimized versions that bring additional features to the table. The 80C186EB operates at higher clock speeds, coupled with an extended instruction set, enabling it to handle more complex tasks and run sophisticated software. These enhancements allow it to serve well in environments that require reliable performance under load, such as data acquisition systems or advanced control systems.

The 80L186EB is tailored for specific low-power scenarios, integrating Intel's sophisticated low-power technologies without compromising on speed. Utilizing advanced process technologies, these chips benefit from reduced heat output and extended operating life, a significant advantage in embedded applications.

Overall, these microprocessors showcase Intel's commitment to innovation in 16-bit processing, marked by their varying capabilities and power profiles tailored to meet the demands of diverse applications, from industrial systems to consumer electronics. Their legacy continues to influence subsequent generations of microprocessor designs, emphasizing performance, energy efficiency, and versatile applications in computing technology. As such, the Intel 80C186 and 80L188 families play a crucial role in understanding the evolution of microprocessor technology.
Top Page Image Contents