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"Fake" XDF disk support works now

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What this means is that XDF disk images formatted as 80-track 23-sector-per-track images will work with XDF code that honors that format; however, I've not yet been able to test with "real" XDF disk images (ie, disk images created with DiskDump using the experimental --xdf flag).  "Real" XDF disk images almost certainly need more work (eg, setting all the sector IDs properly), but the groundwork has been laid.
This commit is contained in:
Jeff Parsons 2014-10-27 22:20:41 -07:00 • committed by jeffpar
commit 024f9fccf8
20 changed files with 1973 additions and 1809 deletions
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40
my_modules/pcjs-client/lib/fdc.js
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@ -256,6 +256,13 @@ FDC.REG_STATUS.RQM = 0x80; // indicates FDC Data Register is ready
FDC.REG_DATA = {};
FDC.REG_DATA.PORT = 0x3F5;
/*
* FDC "Fixed Disk" Register (0x3F6, write-only)
*
* Since this register's functions are all specific to the Hard Disk Controller, see the HDC component for details.
* The fact that this HDC register is in the middle of the FDC I/O port range is an oddity of the "HFCOMBO" controller.
*/
/*
* FDC Digital Input Register (0x3F7, read-only, MODEL_5170 only)
*
@ -850,7 +857,17 @@ FDC.prototype.initDrive = function(drive, iDrive, data)
* care to preserve any drive defaults that initController() already obtained for us, falling back to
* bare minimums only when all else fails.
*/
data[1] = [FDC.DEFAULT_DRIVE_NAME, drive.nCylinders || 40, drive.nHeads || data[3], drive.nSectors || 9, drive.cbSector || 512, data[1]];
data[1] = [
FDC.DEFAULT_DRIVE_NAME, // a[0]
drive.nCylinders || 40, // a[1]
drive.nHeads || data[3],// a[2]
drive.nSectors || 9, // a[3]
drive.cbSector || 512, // a[4]
data[1], // a[5]
drive.nDiskCylinders, // a[6]
drive.nDiskHeads, // a[7]
drive.nDiskSectors // a[8]
];
}
/*
@ -864,25 +881,24 @@ FDC.prototype.initDrive = function(drive, iDrive, data)
/*
* Some additional drive properties/defaults that are largely for the Disk component's benefit.
*/
drive.name = data[i][0];
drive.nCylinders = data[i][1]; // cylinders
drive.nHeads = data[i][2]; // heads/cylinders
drive.nSectors = data[i][3]; // sectors/track
drive.cbSector = data[i][4]; // bytes/sector
drive.fRemovable = data[i][5];
var a = data[i++];
drive.name = a[0];
drive.nCylinders = a[1]; // cylinders
drive.nHeads = a[2]; // heads/cylinders
drive.nSectors = a[3]; // sectors/track
drive.cbSector = a[4]; // bytes/sector
drive.fRemovable = a[5];
/*
* If we have current media parameters, restore them; otherwise, default to the drive's physical parameters.
*/
if (drive.nDiskCylinders = data[i][6]) {
drive.nDiskHeads = data[i][7];
drive.nDiskSectors = data[i][8];
if (drive.nDiskCylinders = a[6]) {
drive.nDiskHeads = a[7];
drive.nDiskSectors = a[8];
} else {
drive.nDiskCylinders = drive.nCylinders;
drive.nDiskHeads = drive.nHeads;
drive.nDiskSectors = drive.nSectors;
}
i++;
/*
* The next group of properties are set by various FDC command sequences.