Newest Win32 include files changed the include file order as compared to the
Microsoft MS compilers.
This is arguably a bug in the MinGW codebase, but working around it is too trivial
to complain about.
The C RTL on the latest VAX/VMS does not provide a snprintf function.
We provide a 'basic' one which meets the needs of simh as suggested
by Jordi Guillaumes Pons.
- EXPECT HALTAFTER=nnn
--> sets "nnn" as the global/default value
- EXPECT "some string"
--> uses the "nnn" global/default value
- EXPECT HALTAFTER=ttt "some string"
--> uses the "ttt" temporary value for this EXPECT only
and:
- SEND AFTER=nnn
--> sets "nnn" as the global/default value
- SEND "some string"
--> uses the "nnn" global/default value
- SEND AFTER=ttt "some string"
--> uses the "ttt" temporary value for this SEND only
(and similarly for the SEND DELAY value).
This allows a device simulator to specifically name the units that it uses
for different purposes. This info is visible in the output of SHOW QUEUE
and debug output.
Once specified or dynamically determined (as previously occurred with
each call to sim_uname()), that name is saved for fast delivery on subsequent
calls. This will remove some overhead when running with debugging on.
- Support for arbitrary long wait intervals in sim_activate_after with
precisely correct delays aligned with the calibrated clock once
per second.
- Proper handling of calls to sim_cancel for calibrated timer units
- Properly allow stopping of calibrated clock by calling sim_rtcn_calb
with a ticksper == 0
- Only schedule asynchronous timer activities for delays longer than
the minimal OS sleep time
- Only wake asynchronous timer thread to queue new timer events
that are shorter than the currently shortest scheduled event
It was defined in lowercase and has now been made upper case for consistency.
The code which performs the match also has been change to do a case
insensitive compare.
Also:
- allow a timer to dynamically stop itself (by calling sim_rtcn_calb
with tps=0), and then to start the internal timer to provide a calibration
baseline if necessary.
- Fix coschedule interval computation when the queue is empty.
- Properly select the correct timer for coscheduling without a specific tmr
- Properly adjust the coschedule queue's next time value when entries are
canceled.
- Cleaned up throttling to behave well with all potential throttling rates and
to make visible what is happening when boundaries are reached.
Clock devices which call sim_register_clock_unit or sim_register_clock_unit_tmr
are best behaved if they use sim_activate_after to schedule their tick events.
Asynchronous clocks are now built for all simulators which are built with
SIM_ASYNCH_IO defined. The default behavior has asynchronous clocks
disabled since this is still experimental, but it can be enabled with
SET TIMER ASYNC.
Catchup clock ticks are now available, but since they're experimental,
they aren't enabled by default. Catchup ticks are only available if the
simulators clock device calls sim_rtcn_tick_ack to acknowledge processing
of clock ticks. The VAX simulators have been modified to leverage this.
Catchup clock ticks can be enabled with SET TIMER CATCHUP
Additionally, an idle threshold is provided which can be used to
influence when clock calibration may be suppressed. The default is not
to suppress calibration activities.
The various timer behaviors are visible with the SHOW TIMER command.
The state of the operating timer facilities is visible with: SHOW CLOCK
Timer events which are queued are visible with the SHOW QUEUE command.
Also extended the optional VM supplied routines to include sim_vm_sprint_addr.
Simulators which provide sim_vm_fprint_addr should also provide
sim_vm_sprint_addr with sim_vm_fprint_addr reworked to leverage
sim_vm_sprint_addr internally. sim_vm_sprint_addr is currently only used by
sim_brk_message() which is an API which a simulator may choose to use if
it supports multiple breakpoint types,
- Add detailed error message info while parsing breakpoint commands
- Properly limit breakpoint class values to reflect available mask bits
- Declare globally sim_brk_npc since it is a documented API
- Revise simh_breakpoints.doc to reflect current behavior
Multiple rules with the same match string are processed in the order the EXPECT
commands are entered. NOEXPECT will remove all pending EXPECT rules which
have the match string provided on the NOEXPECT line.
These changes facilitate more robust parameter type checking and helps
to identify unexpected coding errors.
Most simulators can now also be compiled with a C++ compiler without
warnings.
Additionally, these changes have also been configured to facilitate easier
backporting of simulator and device simulation modules to run under the
simh v3.9+ SCP framework.
This allows simulator code to be insulated from any changes which may
be made to the REG structure in the future. The REGDATA macro will be
update as needed to avoid any changes in simulator specific code.
When creating a new disk image the new disk image can be populated with
unique data in each sector. The data is the logical block address of the sector
in a 4 byte little-endian value. This is enabled when the -I switch is specified
on the ATTACH command. To leverage this, a -K flag is interpreted on the
ATTACH command which will validate the entire disk contents actually
contains the expected value at attach time and also will validate that any data
written to the disk during simulator operation also contains the same logical
block address values.
