HP 3000 Manuals HP 3000 Manuals
Environment Variables System Debug provides a large collection of predefined environment variables, the names of which are reserved and may not be replaced by user-defined variables with the VAR and LOC commands. Several environment variables provide access to the current System Debug execution environment. Examples of these variables include the current input radix and the prompt string. Other environment variables are used to access key components of the state of the machine being examined. For example, all of the machine registers defined in the HP 3000 and HP Precision Architectures are available as environment variables. Subject to the context of use, some of these variables may be set by the user with the ENV command. The environment variables that correspond to the CM and NM machine registers are also accessible through the MR (modify register) and DR (display register) commands. All environment variables may be read (accessed) as expression operands. Some environment variables also require privileged mode for modification access. The ENV command in chapter 4 gives a detailed description of each of the predefined environment variables and specifies which ones may be modified and which ones are read-only.