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Updated the manifest for the PC-DOS 1.00 disk (and shrank the JSON-encoded image a bit)

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This commit is contained in:
Jeff Parsons 2017-06-21 19:20:54 -07:00 • committed by Jeff Parsons
commit 80d2c3a334
3 changed files with 50 additions and 3 deletions
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8
modules/diskdump/lib/diskdump.js
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@ -2792,6 +2792,7 @@ DiskDump.prototype.convertToJSON = function()
for (i = DiskAPI.BPB.SECTOR_BYTES; i < DiskAPI.BPB.LARGE_SECS+4; i++) {
this.bufDisk.writeUInt8(DiskDump.aDefaultBPBs[iBPB][i] || 0, offBootSector + i);
}
console.log("warning: BPB has been updated");
}
else if (bByte0 == 0xF6 && bByte1 == 0xF6) {
/*
@ -2808,12 +2809,16 @@ DiskDump.prototype.convertToJSON = function()
}
}
if (fBPBExists) {
if (fBPBExists && this.bufDisk.readUInt16LE(offBootSector + DiskAPI.BOOT.SIG_OFFSET) == DiskAPI.BOOT.SIGNATURE) {
/*
* Overwrite the OEM string with our own, so that people know how the image originated. We do this
* only for disks with pre-existing BPBs; it's not safe for pre-2.0 disks (and non-DOS disks, obviously).
*
* The signature check is another pre-2.0 disk check, to avoid misinterpreting any BPB that we might have
* previously added ourselves as an original BPB.
*/
this.bufDisk.write(DiskDump.PCJS_OEM, DiskAPI.BOOT.OEM_STRING + offBootSector, DiskDump.PCJS_OEM.length);
console.log("warning: OEM string has been updated");
}
if (!nHeads) {
/*
@ -3368,6 +3373,7 @@ DiskDump.prototype.convertToIMG = function()
* Overwrite the OEM string with our own, so that people know how the image originated.
*/
buf.write(DiskDump.PCJS_OEM, DiskAPI.BOOT.OEM_STRING, DiskDump.PCJS_OEM.length);
console.log("warning: OEM string has been updated");
}
}
} catch(err) {