Intel 80L186EC GO from codeaddr Till codeaddr or codeaddr, GO Till codeaddr or codeaddr

INTEL 186 EB/EC EVALUATION BOARD USER’S MANUAL

GO FROM code_addr FOREVER

This command loads the user’s PC with code_addr, clears the breakpoint array, and starts execution of the user’s code.

GO FROM code_addr TILL code_addr

This command loads the user’s PC with the code_addr that follows the FROM keyword, sets the first breakpoint (BR[0]) to the code_addr that follows the TILL keyword, and starts execution of the user’s code.

GO FROM code_addr TILL code_addr OR code_addr

This command acts like the previous command, except that it also sets the second breakpoint (BR[1]) to the code_addr that follows the OR keyword.

GO TILL code_addr This command sets the first breakpoint (BR[0]) to code_addr and starts the execution of user code using the current setting of the user’s PC and the breakpoint array.

GO TILL code_addr OR code_addr

This command acts like the previous command, except that it also sets the second breakpoint (BR[1]) to the code_addr that follows the OR keyword.

HALT	This command stops execution of user code by forcing the processor
	to execute a jump to self instruction in a reserved location.

5.3.4Program Stepping

These commands allow stepping through programs one instruction at a time. Between instruc- tions, the iECM-86 commands can be used to check the state of the variables changed by the instruction, to ensure that the program is operating properly. Stepping through code allows a more detailed look at what is going on in the program. The price paid for this detail is that stepping does not occur in real time; this makes it difficult, or perhaps impossible, to use on code that is tied to real-time events.

Stepping while interrupts are enabled would be confusing, since interrupt service routines would be stepped through as well as sequential code. iECM-86 avoids this problem by artificially locking out interrupts while stepping, ignoring the state of the interrupt enable (IF) or interrupt mask.

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