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Accommodate operations like PC-DOS 1.10 reformatting a single-sided 160Kb disk image as a double-sided 320kb disk image

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Jeff Parsons 2017-07-01 11:39:28 -07:00 • committed by Jeff Parsons
commit 97ee1cf73d
6 changed files with 314 additions and 302 deletions
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12
modules/pcx86/lib/disk.js
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@ -1817,6 +1817,12 @@ class Disk extends Component {
for (i = 0; i < track.length; i++) {
track[i] = this.initSector(null, iCylinder, iHead, i + 1, drive.nBytes, 0);
}
/*
* TODO: This is more dodginess, because we can't be certain that every cylinder on the disk
* will receive the same "expanded" treatment, but functions like getSector() rely on instance
* properties (eg, this.nHeads), on the assumption that the disk's geometry is homogeneous.
*/
if (this.nHeads <= iHead) this.nHeads = iHead + 1;
}
if (track) {
for (i = 0; i < track.length; i++) {
@ -1859,6 +1865,12 @@ class Disk extends Component {
*/
if (!sector && drive.bFormatting && drive.bSector == 9) {
sector = track[i] = this.initSector(null, iCylinder, iHead, drive.bSector, drive.nBytes, 0);
/*
* TODO: This is more dodginess, because we can't be certain that every track on the disk
* will receive the same "expanded" treatment, but functions like getSector() rely on instance
* properties (eg, this.nSectors), on the assumption that the disk's geometry is homogeneous.
*/
if (this.nSectors < drive.bSector) this.nSectors = drive.bSector;
}
}
}