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BACKTRACK support: PCjs can now report which portions of which files are being read into memory

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This commit is contained in:
Jeff Parsons 2014-12-27 15:13:08 -08:00 • committed by jeffpar
commit 197392bce9
5 changed files with 407 additions and 155 deletions
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10
modules/diskdump/lib/diskdump.js
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@ -194,7 +194,7 @@ DiskDump.aDefaultBPBs = [
0xEB, 0xFE, 0x90, // 0x00: JMP instruction, following by 8-byte OEM signature
0x49, 0x42, 0x4D, 0x20, 0x20, 0x31, 0x2E, 0x30, // "IBM 1.0" (this is a fake OEM signature)
0x00, 0x02, // 0x0B: bytes per sector (0x200 or 512)
0x01, // 0x0D: sectors per cluster (2)
0x01, // 0x0D: sectors per cluster (1)
0x01, 0x00, // 0x0E: reserved sectors; ie, # sectors preceding the first FAT--usually just the boot sector (1)
0x02, // 0x10: FAT copies (2)
0x40, 0x00, // 0x11: root directory entries (0x40 or 64) 0x40 * 0x20 = 0x800 (1 sector is 0x200 bytes, total of 4 sectors)
@ -2113,7 +2113,7 @@ DiskDump.prototype.convertToJSON = function()
*/
}
var bByte0 = this.bufDisk.readUInt8(offBootSector + DiskAPI.BPB.JMP_OPCODE);
var bByte0 = this.bufDisk.readUInt8(offBootSector + DiskAPI.BOOT.JMP_OPCODE);
var cbSectorBPB = this.bufDisk.readUInt16LE(offBootSector + DiskAPI.BPB.SECTOR_BYTES);
/*
@ -2144,7 +2144,7 @@ DiskDump.prototype.convertToJSON = function()
*/
if ((bByte0 == X86.OPCODE.JMP || bByte0 == X86.OPCODE.JMPS) && cbSectorBPB == cbSector) {
var nHeadsBPB = this.bufDisk.readUInt16LE(offBootSector + DiskAPI.BPB.HEAD_TOTAL);
var nHeadsBPB = this.bufDisk.readUInt16LE(offBootSector + DiskAPI.BPB.TOTAL_HEADS);
var nSectorsTotalBPB = this.bufDisk.readUInt16LE(offBootSector + DiskAPI.BPB.TOTAL_SECS);
var nSectorsPerTrackBPB = this.bufDisk.readUInt16LE(offBootSector + DiskAPI.BPB.TRACK_SECS);
@ -2714,13 +2714,13 @@ DiskDump.prototype.convertToIMG = function()
/*
* Mimic the BPB test in convertToJSON(), because we don't want to blast an OEM string into non-DOS diskette images
*/
var bByte0 = buf.readUInt8(DiskAPI.BPB.JMP_OPCODE);
var bByte0 = buf.readUInt8(DiskAPI.BOOT.JMP_OPCODE);
var cbSectorBPB = buf.readUInt16LE(DiskAPI.BPB.SECTOR_BYTES);
if ((bByte0 == X86.OPCODE.JMP || bByte0 == X86.OPCODE.JMPS) && cbSectorBPB == 512) {
/*
* Overwrite the OEM string with our own, so that people know how the image originated
*/
buf.write(DiskDump.MY_OEM_STRING, DiskAPI.BPB.OEM_STRING, DiskDump.MY_OEM_STRING.length);
buf.write(DiskDump.MY_OEM_STRING, DiskAPI.BOOT.OEM_STRING, DiskDump.MY_OEM_STRING.length);
}
}
} catch(err) {