"Get cluster information" function call, improvements to EMUFILE #35
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
- Add the appropriate entry points in the kernel - Add the function skeleton, for now it only checks if the drive exists - Add the entry point in NEXTOR.SYS (and step it up to v2.11)
(to do: fill FAT sector number and offset)
- Use a dedicated buffer, instead of TMP_FCB, for intermediate data - Add an explicit flag for FAT12 drives - Return .NDOS if the drive is neither FAT12 nor FAT16 - Add a flag for unused clusters - Always return the real value of the cluster (not FFFFH always when it's the last cluster in the file)
A new error code is defined (.ICLUS, B0h), it will be returned when the cluster number supplied to GETCLUS is invalid; the "valid cluster number" flag has been removed. Also, some missing Japanese error messages have been added.
- It uses the new GETCLUS function to check the FAT chain of disk image files when createing an .EMU file. - It now accepts a directory as paramneter for "set", then it searches a file with the same name and .EMU extension inside the directory.
Merged
Konamiman
changed the title
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
This pull request adds a new function call, GETCLUS (code 7Eh), that allows to retrieve information about a given cluster in a FAT12 or FAT16 drive. The information returned is:
A new tool is added, CONCLUS: it checks the FAT chain of a given file using the new function, and tells whether the file is stored across consecutive sectors in the disk or not.
Also the EMUFILE tool is updated to use this new function in order to check if disk image files are stored across consecutive sectors in the disk.
As a bonus, there's another improvement to EMUFILE: now the "set" command accepts a directory name as parameter instead of a file name. When a directory name is supplied, a file with the same name and .EMU extension will be used. For example,
EMUFILE SET \DSKS\GAMEis equivalent toEMUFILE SET \DSKS\GAME\GAME.EMUif\DSKS\GAMEis a directory.