| Commit message (Collapse) | Author | Age |
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This is a complete rewrite and restructure of the entire emulator
project, as part of the effort in locking down the Bedrock specification
and in creating much better tooling for creating and using Bedrock
programs.
This commit adds a command-line argument scheme, an embedded assembler,
a headless emulator for use in non-graphical environments, deferred
window creation for programs that do not access the screen device,
and new versions of phosphor and bedrock-core. The new version of
phosphor supports multi-window programs, which will make it possible to
implement program forking in the system device later on, and the new
version of bedrock-core implements the final core specification.
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The major feature of this refactor is the creation of BedrockFilePath,
a type which can be losslessly converted into an operating-system
specific path or a Bedrock-style byte path. It also prevents file paths
which can't be represented as Bedrock-style byte paths from being
constructed, and allows the use of a base directory which acts as an
inescapable sandbox.
BedrockFilePath will support the creation of a virtual root directory
on Windows which will allow navigation between drive letters via the
standard hierarchical navigation ports.
This commit has been tested on Linux, but not yet Windows. Further work
is expected before the new code will work on Windows.
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This is to allow the program to detect whether the previous ascend or
descend operation succeeded.
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When the clock device was first in order to be responded to, a fast
enough recurring timer could successfully prevent any other device
from being able to wake the emulator, if a timer was able to expire
in the time it took to run the clock wake handler.
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There was confusion between the role of the page_limit variable in the
memory device, where it was being used to mean both the absolute upper
limit of pages that are allowed to be allocated, but also to mean the
number of pages that the program would like to be allocated when needed.
To fix this, the program is now just told the full number of pages that
it is allowed to use, without first requiring that the program request
a particular number of pages.
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The memory device was never being allocated any memory, the input device
wasn't scrolling correctly, the screen device was rendering sprites
incorrectly, and the device ID of the file device had not been changed
over from 0xA to 0x9.
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This is a complete redesign of the file device. The most notable
addition is the ability to ascend and descend the file tree.
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An effort to make the code shorter and more readable. This mostly
affects the code for the clock device.
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The "Cumulative seconds" port of the CLOCK device has been changed
to be called "Cumulative timer", with the units changing from seconds
to 1/256 second ticks.
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