NOCALIBRATE mode allows all activity of a simulator run to occur with
precisely consistent event timing. In this mode, every clock tick takes
precisely the same number of instructions/cycles. Likewise, the polling
activities for MUX or other poll oriented devices occurs after precisely
the same number of instructions/cycles executed. As a consequence of
this mode, no effort to align simulated clock ticks (and simulated access
to wall clock time) is made.
This mode might be useful for running diagnostics which expect a
particular relationship between perceived wall clock and instruction
times. It might also be useful for running test scripts which may want
to compare output of previous executions to to current execution or
to compare execution on arbitrarily different host computers.
In NOCALIBRATE mode, the operator gets to specify the pseudo
execution rate along with the base wall clock time that access to
pseudo wall clock accesses returns.
strtotv was extended long ago to allow radix prefixes (0x, 0X, 0b, 0B
and 0) for input when 0 was specified as the parsing radix. The uses
from calls to get_uint() need to specify a 0 radix to leverage this
which wasn't done at that time.
AltairZ80 uses 0 for the VM-specific HLT instruction stop code.
SCP defines SCPE_OK as 0.
SCP uses 0 to mean all errors ("ON ERROR").
The command "ON 0" will generate "%SIM-ERROR: Invalid argument: 0".
This PR changes the HALT stop code from 0 to 5.
- Validation was incorrect for large numbers
- Polish help text for DO command variable insertion
- Polish help text for file name part expansion
- Add SIM_RUNTIME (number of instructions/cycles executed)
- Add SIM_RUNTIME_UNITS (instructions or cycles)
Partial reading is needed to properly read common archive images found
on bitsavers and elsewhere which were made from QIC devices which must
read multiples of 512 bytes at a time.
Some potential packaging platforms do not want to package/distribute
simh simulators which have build-in binary code (ROM images or other
boot code) which may have unknown copyright status. Historically Linux
distributed prebuild simulators but left it to a simulator user to reach out
on the web to pick up these needed pieces to actually use the simulator(s).
This addition allows the default simulator builds to include the needed
binary components built into the simulator(s). In addition, it also
allows simlators to be built with DONT_USE_INTERNAL_ROM defined and thus
not to contain the material with potentially questionalble providence,
but to transparently reach out to the web to fetch the needed component(s)
when they are needed without any effort on the part of the simulator user.
- Update README to describe differences with open-simh
- Allow SET NOAUTOSIZE and SET AUTOSIZE
- Document deprecation and possibly non functionality of MinGW
Windows build support
Compiled in support is preferred over dlopen efforts with a fallback to
printf/fgets when neither is available at compile and runtime.
All platforms support file path expansion on command entry of tab characters
- Leverage libedit which is minimal libreadline with BSD license
- Wineditline on Windows which is also a libreadline equivalent with
a BSD license
Both are dynamically loaded on startup if they're available on
the host.
