The key change is the addition of:
When a simulator starts execution, the following sequence of simh command
files are executed if they are found:
1. If a file named simh.ini is located in your HOME directory, it is
executed.
2. If the simh.ini file in your HOME directory isn’t found, a file named
simh.ini in your current working directory is executed if it exists.
3. If the simulator is invoked with any arguments, then the arguments are
presumed to be a command file and possible arguments to that command
file which is executed.
4. If the simulator is invoked without any arguments, then a command file
with the same name as the simulator binary with .ini appended that is
located in the current working directory is executed.
Note, that up to 2 separate command files may be executed on simulator
startup. The simh.ini file allows the user to define local user
preferences that align with their personal goals for simulator execution
across all simulators that may be used on their system.
Steps 3 and 4 were inherited from simh v3.x. Steps 1 and 2 was inspired
by conversations with J. David Bryan in April of 2012. Some how it
never got documented.
- Assure that Internal variables are referencable during expression evaluation
- Add DEVNAME.REGNAME format for referencing non unique registers in
expression evaluation.
- Extend global register search to also search known internal device list
registers
- Allow expression variable names to have _ as a character within in the name
%% now inserts a bare % and \\ only means something when parsing a quoted
string argument (used by EXPECT and SEND commands).
Additionally, EXPECT and BREAK commands have action steps which will now
expand arguments as each of the actions are executed rather than when the
EXPECT or BREAK command is defined.
The output of remote console commands gets truncated at the configured
buffer size. The default has been raised from 1400 to 8192.
Common remote console usage is from the same host as the simulator and
as such localhost TCP traffic is delivered in chunks at least 8192 so no extra
packets will be involved in transporting the potential extra data and no
transmission delays on the send() call.
The minumum size is now 1400 (which was the prior default).
The RUN command implicitly resets all devices which may have unexpected
consequences for a novice user.
The logic now produces a warning about this side effect when more than one
RUN command is executed in the same simulator session.
An explicit RESET command suppresses this warning for a subsequent RUN
command.
A RUN command with the -Q switch also suppresses this warning.
Users wanting to build simulators with locally build dependent packages or
packages provided by an unsupported package management system can
override where this procedure looks for include files and/or libraries.
Overrides can be specified by define exported environment variables or
GNU make command line arguments which specify INCLUDES and/or LIBRARIES.
Each of these, if specified, must be the complete list include directories
or library directories that should be used with each element separated by
colons. (i.e. INCLUDES=/usr/include/:/usr/local/include/:...)
Binaries built with unsupported library components will have a 'unsupported' tag
in the output of the SHOW VERSION command.
Added -Q switch to suppress version check messages
Added -D switch to disable the detach_all at the beginning of a restore and any actual attach operations during the restore
