Intel 80C186EC, 80L188EC, 80L186EB, 80L186EC, 80C186EB, 80C188EB IRISM Variables, Other Variables

CHAPTER 6 iRISM-186 COMMANDS

This chapter describes the elements of iRISM-186 monitor code. This information is common to all implementations.

6.1iRISM VARIABLES

The following table lists the RISM variables and provides a description of each.

	Table 6-1. iRISM Variables
Variable	Description
RISM_DATA	A 32-bit register that acts as the primary data interface between software
	running in the host and the RISM running in the target.
RISM_ADDR	A 32-bit register that contains the address to be used for reading and writing
	target memory. The base address is contained in the most significant word
	and the offset is in the least significant word.
RISM_STATUS	An 8-bit register used to store RISM status and state information. This
	register contains the following boolean flags:
	BOOLEAN FLAGS
DATA_FLAG	Indicates that the next character received by the RISM should be treated as a
	data byte, even if its value corresponds to an implemented command.
RUN_FLAG	Indicates that the target is running user code. It can modify the operation of
	some RISM commands.
TRAP_FLAG	Indicates that the target was running user code, but that a software trap
	suspended its execution. The TRAP_FLAG is cleared whenever RISM starts
	execution of user code.
DIAG_FLAG	An optional flag that indicates that the target is operating in a diagnostic
	mode. Details of this flag are implementation-dependent.
USER_CS /	Used to save the user’s program counter while the user’s code is not
USER_IP	executing.
USER_FLAGS	Saves the user’s program status word while the user’s code is not executing.

6.1.1Other Variables

Specific implementations of RISMs will require other variables for temporary storage.

6

6-1