This commit introduces dozens of changes to make the 3B2-700 simulator
fully functional and ready for wider use. In addition to 3B2-700
availability, this commit includes a tremendous amount of refactoring
of the 3B2-400 and common code to make the project structure easier to
maintain and reason about.
One final important change: ROM files are no longer included in the
source code. 3B2 ROM images must be obtained separately and loaded
into the simulator before boot.
Changes:
- The 3b2 target has been aliased to 3b2-400
- The formerly named 3b2-600 project has become 3b2-700
- SCSI QIC tape support has been added to sim_scsi.c
- Header files have been reworked to reduce complexity of includes
- Common code has been consolidated
- Timer code has been unified
At this time:
- The ZAP command exists to remove meta data from containers that
have it. Container files processed by the ZAP command will generally
be restored to the size it was before the addition of the meta data
and the file time stamps will be unchanged.
- Newly created containers get meta data.
- At attach time, containers that don't have meta data, but have
recognized file systems that fit within the drive it is being
attached to get meta data added without changing the file timestamps.
- Containers that don't have meta data and don't have a recognized
file system that is <= the drive size are attached without comment
and without adding meta data as long as the drive is NOT set to
autosize (controllers that support multiple drive types all default to
autosize, which can explicitly be disabled on a drive by drive basis).
- Containers that don't have meta data which are > the drive size can
only be attached read only.
- Containers with meta data can not be attached to a different
controller at all if the container size is smaller than the drive on the
other controller.
- Containers that have meta data can be freely be attached to the
controller that they were attached to when they got the meta data.
If a file system is detected, it will be reported. Otherwise if no
recognized file system is found, the attach will be silent. File
system detection reporting can be suppressed with -Q on the attach
command.
- Containers with meta data can only be attached read only to a different
controller if the container is larger than the drive it is being
attached to.
In the future:
- In general, containers with meta data (or recognized file systems)
will be attachable to MSCP and SCSI controllers, as long as reasonable
sector sizes and file system not requiring interleaving have been found.
- Containers without meta data will only be attachable if autosize
is disabled and the container is <= the size of the drive.
- Explicitly setting a drive type on a unit will implicitly disable
autosizing. If a user wants to set the default drive for a unit
and still allow autosizing they must explicitly set the unit to
autosize after setting the drive type.
Relevant to: #1065, #1059, #1094, #1100, #1118, #1117
Historically this functionality was reimplemented within each
DEVICE simulator often with slightly different implementations
and inconsistencies. Solving this globally within SCP required
changes in many places, but should henceforth be reasonably
managed.
As discussed in #1034
