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Since KInts.HC is compiled before DskFDC.HC, undefined symbol issues could possibly occur. when attempting to compile the interrupt set-up code because the IRQ handler is not yet compiled. To prevent this, I separated the IRQ handler into another file that is included immediately after the headers. The instructions have been updated to reflect this change.
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Some of the patches are applied to files in subdirectories of ::/Kernel and ::/Adam. The directory tree has been re-arranged in such a way as to allow them to be #included without having the compiler backtrack to their parent directory.
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I forgot to stage the change I made to this file's code tags. Whoops.
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I fixed the punctuation on some of the info tags, and added a few more THEN tags where they were needed.
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I had updated several more files after staging the previous ones, but forgot to stage these files as well. Thus, I had to commit these separately.
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I have added the "PURPOSE", "TO USE", and "THEN" tags to make the information sections more easy to read while keeping line length down. These are used by a Python script I wrote to generate an instruction file.
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KFloppyB2.HH has now replaced KFloppyB.HH, and has been renamed accordingly.
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The time has finally come for the old code to be removed from the source tree.
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As a result of a "brain fart," I erroneously added install instructions to the old version of KernelB.HH; KernelB2.HH already had install instructions.
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I realized that KFloppyA would have to be included before KInts is, so that the IRQ definition can be used by IntInit2. The install instructions have been updated accordingly. Installation instructions were also added to KernelB.
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The IRQ handlers in TempleOS' kernel code have an "IRQ_" prefix. FDCInt has been renamed to IRQ_FDC in keeping with Terry's code style. An unused definition of the same name has also been removed from KFloppyA.HH.
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The register offsets apply to all floppy controllers, and not just the first. The comment I had there has been updated to reflect this.
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I added comments to all patch files explaining their function and how to install them. Installation instructions were also added to some of the code files as well.
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Since this file is effectively a patch to KStart32, it makes sense to keep it in the Patches subdirectory.
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I added headers for the "read ID" and disk check functions, and added the proper types.
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This file patches Let2BlkDevType to provide drive letters for floppy drives. The original function is to be commented out and this file included in its place.
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This file adds a case to BlkDevInit for the floppy BDT, allowing it to be initialized. It is to be placed after the last case in the function's switch statement.
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The Bt call was modified to test for the corrrect bit of SRA.
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FDCWriteBlks now checks if the disk is write-protected before attempting a write, throwing an exception if it is. I also reworked the retry check for both it and FDCReadBlks.
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I realized that the logic that determined the sector size value sent to the controller would not work properly on larger sector size, so I redid it.
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The BlkDevAdd code now checks if the floppy disk has a valid RedSea boot sector before attempting to initialize it.
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BlkDevAdd should set drv_offset to 0 (since the BlkDev's drv_offset will also be zero; floppies don't have a partition table), so I removed the forced-set to 0 in the code.
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I have added a function that will check for the presence of valid sector data on either side of a floppy disk. This function is used to check for the presence of a disk in a way that does not rely on the proper handling of the disk change flag.
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This file adds code for handling floppy block devices to the BlkDevAdd function. It is to be included at the end of the function's switch statement.
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This file replaces the DefineLstLoad call that sets ST_BLKDEV_TYPES to add the FDC type. The original code is to be commented out and this file included after it.
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This file replaces the block device type list in KernelA.HH. The original code is to be commented out and this file included after it.
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I halved the size of the DMA buffer in keeping with the "one track at a time" methodology I have adopted.
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This file contains new headers for the BlkDev-ified driver.
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I added the data rate values accepted by the FDC to the main header file.
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I moved the version check into the drive-0-only code; it wouldn't make sense to check the version each time a drive gets initialized.
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I have decided not to use multi-track mode and instead do atomic reads and writes to sector ranges. I have also added a timeout to the motor command when the motor is turned on (approximately 500 milliseconds to accomodate 5ΒΌ" drives). FDCInit now sets the highest-accessible block.
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DMA will always be used, so I have removed the DMA flag from CBlkDev.
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This is the initial commit for the BlkDev-ified driver. It is not at all
in a working state at this point, and the old files have been left for
reference purposes.
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I fixed the read and write functions so that they correctly check the
status of the controller before performing the write (hopefully).
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I have moved some source files into subdirectories for ease of
installation. I have also added an installer script to automatically
place driver files into their respective system directories.
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