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pkimpel.retro-b5500/tools/B5500DiskSystemLogFixer.html
paul.kimpel@digm.com 7c9cab76ba 1. Release emulator version 0.12. 
2. Debug Processor for multi-processor operation (not working yet).
3. Further refinements to Processor.schedule() and throttling management.
4. Correct Processor fetch of Initiate Control Word for IP1 and IP2.
5. Enable second Disk File Control Unit (DKB) -- works.
6. Fix minor P1 bug in cc.clearInterrupt().
7. Reset file selector control in B5500CardReader to allow same deck to be reloaded under Google Chrome.
8. Fix (finally) creation of SYSTEM/LOG and DIRCTRY/DISK in B5500ColdLoader.
9. Implement tools/B5500DiskDirFixer.html and tools/B5500DiskSystemLogFixer.html utilities to correct bad directory entries due to improper log creation in B5500ColdLoader.
10. Correct tools/LOG-MAKER.job to create SYSTEM/LOG on systems that do not have one.
11. Do not output zero-length lines (mem inhibit) with zero spacing in B5500DummyPrinter.
12. Implement separate setTimeout() tokens for input and output in B5500SPOUnit.
13. Additional de-anonymization of functions.
2013-07-29 05:15:41 +00:00

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<!DOCTYPE html>
<head>
<title>B5500 Disk SYSTEM/LOG Fixer Utility</title>
<meta name="Author" content="Paul Kimpel">
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta http-equiv="Content-Script-Type" content="text/javascript">
<meta http-equiv="Content-Style-Type" content="text/css">
<script>
/***********************************************************************
* retro-b5500/tools B5500DiskSystemLogFixer.html
************************************************************************
* Copyright (c) 2013, Paul Kimpel.
* Licensed under the MIT License,
* see http://www.opensource.org/licenses/mit-license.php
************************************************************************
* B5500 Disk SYSTEM/LOG Fixer Utility.
*
* This script opens an IndexedDB database in the browser and attempts to
* treat it as a B5500 disk image, finding a specified file in the disk
* directory structure, manipulating the header, and writing the header
* back to the directory. This is intended to be a customized one-timer
* sort of program, modified as necessary for the fix-up task at hand.
************************************************************************
* 2013-07-27 P.Kimpel
* Original version, from B5500DiskDirList.html.
***********************************************************************/
"use strict";
if (!window.indexedDB) { // for Safari, mostly
window.indexedDB = window.webkitIndexedDB || window.mozIndexedDB;
}
window.addEventListener("load", function() {
var configName = "CONFIG"; // database configuration store name
var dbName = "B5500DiskUnit"; // IDB database name
var dbVersion = 1; // current IDB database version
var directoryTop; // start of directory area
var directoryEnd; // end of directory area
var euPrefix = "EU"; // prefix for EU object store names
var config = null; // copy of CONFIG store contents
var disk = null; // the IDB database object
var panel = $$("TextPanel");
var BICtoANSI = [ // Index by 6-bit BIC to get 8-bit ANSI code
0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37, // 00-07, @00-07
0x38,0x39,0x23,0x40,0x3F,0x3A,0x3E,0x7D, // 08-1F, @10-17
0x2B,0x41,0x42,0x43,0x44,0x45,0x46,0x47, // 10-17, @20-27
0x48,0x49,0x2E,0x5B,0x26,0x28,0x3C,0x7E, // 18-1F, @30-37
0x7C,0x4A,0x4B,0x4C,0x4D,0x4E,0x4F,0x50, // 20-27, @40-47
0x51,0x52,0x24,0x2A,0x2D,0x29,0x3B,0x7B, // 28-2F, @50-57
0x20,0x2F,0x53,0x54,0x55,0x56,0x57,0x58, // 30-37, @60-67
0x59,0x5A,0x2C,0x25,0x21,0x3D,0x5D,0x22]; // 38-3F, @70-77
var BICtoBCLANSI = [ // Index by 6-bit BIC to get 8-bit BCL-as-ANSI code
0x23,0x31,0x32,0x33,0x34,0x35,0x36,0x37, // 00-07, @00-07
0x38,0x39,0x40,0x3F,0x30,0x3A,0x3E,0x7D, // 08-1F, @10-17
0x2C,0x2F,0x53,0x54,0x55,0x56,0x57,0x58, // 10-17, @20-27
0x59,0x5A,0x25,0x21,0x20,0x3D,0x5D,0x22, // 18-1F, @30-37
0x24,0x4A,0x4B,0x4C,0x4D,0x4E,0x4F,0x50, // 20-27, @40-47
0x51,0x52,0x2A,0x2D,0x7C,0x29,0x3B,0x7B, // 28-2F, @50-57
0x2B,0x41,0x42,0x43,0x44,0x45,0x46,0x47, // 30-37, @60-67
0x48,0x49,0x5B,0x26,0x2E,0x28,0x3C,0x7E]; // 38-3F, @70-77
var ANSItoBIC = [ // Index by 8-bit ANSI to get 6-bit BIC (upcased, invalid=>"?")
0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C, // 00-0F
0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C, // 10-1F
0x30,0x3C,0x3F,0x0A,0x2A,0x3B,0x1C,0x0C,0x1D,0x2D,0x2B,0x10,0x3A,0x2C,0x1A,0x31, // 20-2F
0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0D,0x2E,0x1E,0x3D,0x0E,0x0C, // 30-3F
0x0B,0x11,0x12,0x13,0x14,0x15,0x16,0x17,0x18,0x19,0x21,0x22,0x23,0x24,0x25,0x26, // 40-4F
0x27,0x28,0x29,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,0x1B,0x0C,0x3E,0x0C,0x0C, // 50-5F
0x0C,0x11,0x12,0x13,0x14,0x15,0x16,0x17,0x18,0x19,0x21,0x22,0x23,0x24,0x25,0x26, // 60-6F
0x27,0x28,0x29,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,0x2F,0x20,0x0F,0x1F,0x0C, // 70-7F
0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C, // 80-8F
0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C, // 90-9F
0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C, // A0-AF
0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C, // B0-BF
0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C, // C0-CF
0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C, // D0-DF
0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C, // E0-EF
0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C]; // F0-FF
var BCLANSItoBIC = [ // Index by 8-bit BCL-as-ANSI to get 6-bit BIC (upcased, invalid=>"?")
0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C, // 00-0F
0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C, // 10-1F
0x1C,0x1B,0x1F,0x00,0x20,0x1A,0x3B,0x0C,0x3D,0x2D,0x2A,0x30,0x10,0x2B,0x3C,0x11, // 20-2F
0x0C,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0D,0x2E,0x3E,0x1D,0x0E,0x0B, // 30-3F
0x0A,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,0x21,0x22,0x23,0x24,0x25,0x26, // 40-4F
0x27,0x28,0x29,0x12,0x13,0x14,0x15,0x16,0x17,0x18,0x19,0x3A,0x0C,0x1E,0x0C,0x0C, // 50-5F
0x0C,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,0x21,0x22,0x23,0x24,0x25,0x26, // 60-6F
0x27,0x28,0x29,0x12,0x13,0x14,0x15,0x16,0x17,0x18,0x19,0x2F,0x2C,0x0F,0x3F,0x0C, // 70-7F
0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C, // 80-8F
0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C, // 90-9F
0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C, // A0-AF
0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C, // B0-BF
0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C, // C0-CF
0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C, // D0-DF
0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C, // E0-EF
0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C,0x0C]; // F0-FF
var pow2 = [ // powers of 2 from 0 to 52
0x1, 0x2, 0x4, 0x8,
0x10, 0x20, 0x40, 0x80,
0x100, 0x200, 0x400, 0x800,
0x1000, 0x2000, 0x4000, 0x8000,
0x10000, 0x20000, 0x40000, 0x80000,
0x100000, 0x200000, 0x400000, 0x800000,
0x1000000, 0x2000000, 0x4000000, 0x8000000,
0x10000000, 0x20000000, 0x40000000, 0x80000000,
0x100000000, 0x200000000, 0x400000000, 0x800000000,
0x1000000000, 0x2000000000, 0x4000000000, 0x8000000000,
0x10000000000, 0x20000000000, 0x40000000000, 0x80000000000,
0x100000000000, 0x200000000000, 0x400000000000, 0x800000000000,
0x1000000000000, 0x2000000000000, 0x4000000000000, 0x8000000000000,
0x10000000000000];
/**************************************/
function $$(id) {
return document.getElementById(id);
}
/**************************************/
function bitTest(word, bit) {
/* Extracts and returns the specified bit from the word */
var e = 47-bit; // word lower power exponent
var p; // bottom portion of word power of 2
if (e > 0) {
return ((word - word % (p = pow2[e]))/p) % 2;
} else {
return word % 2;
}
}
/**************************************/
function fieldIsolate(word, start, width) {
/* Extracts a bit field [start:width] from word and returns the field */
var le = 48-start-width; // lower power exponent
var p; // bottom portion of word power of 2
return (le == 0 ? word : (word - word % (p = pow2[le]))/p) % pow2[width];
}
/**************************************/
function spout(text) {
/* Appends "text"+NL as a new text node to the panel DOM element */
var e = document.createTextNode(text + "\n");
panel.appendChild(e);
$$("PageBottom").scrollIntoView();
}
/**************************************/
function clearPanel() {
/* Clears the text panel */
var kid;
while (kid = panel.firstChild) {
panel.removeChild(kid);
}
}
/**************************************/
function rtrim(s) {
/* Trims trailing spaces from "s" and returns the resulting string */
var m = s.match(/^(.*?) *$/);
return m[1];
}
/**************************************/
function padToLength(text, len) {
/* Converts the input string "text" to exactly "len" characters,
truncating or padding on the right with spaces as necessary */
var x = text.length;
if (x > len) {
return text.substring(0, len);
} else {
x = len-x;
while (x-- > 0) {
text += " ";
}
return text;
}
}
/**************************************/
function stringToANSI(text, bytes, bx, asBinary) {
/* Translates the characters in a string to upper case, and then to ANSI
byte-array format. "text" is the input string, "bytes" is the Uint8Array
output buffer, and "bx" is the offset into that output buffer. If "asBinary" is
truthy, the translation is binary, otherwise it is done as BCLANSI */
var len = text.length;
var table1 = (asBinary ? BICtoANSI : BICtoBCLANSI);
var utxt = text.toUpperCase();
var x;
bx = bx || 0;
for (x=0; x<len; x++) {
bytes[bx++] = table1[ANSItoBIC[utxt.charCodeAt(x) & 0xFF]];
}
}
/**************************************/
function wordsToANSI(words, wx, wLength, bytes, bx, asBinary) {
/* Translates an array of B5500 words to ANSI byte-array format.
"words" = the array of words
"wx" = the starting index in "words"
"wLength" = the number of words to translate
"bytes" = a Uint8Array array
"bx" = the starting index in "bytes" to store the translated data
"asBinary" = if truthy, then binary translation is done; otherwise
B5500 BCLANSI translation is done */
var c;
var table = (asBinary ? BICtoANSI : BICtoBCLANSI);
var w;
var x;
var y;
var z;
bx = bx || 0;
if (wLength < 0) {
wLength = -wLength;
}
for (x=0; x<wLength; x++) {
w = words[wx+x] || 0;
for (y=0; y<8; y++) {
z = w % 0x40000000000;
c = (w-z)/0x40000000000;
bytes[bx++] = table[c];
w = z*64;
}
}
}
/**************************************/
function wordsToString(words, wx, wLength, asBinary) {
/* Translates an array of B5500 words to a string and returns the string.
"words" = the array of words
"wx" = the starting index in "words"
"wLength" = the number of words to translate
"asBinary" = if truthy, then binary translation is done; otherwise
B5500 BCLANSI translation is done */
var c;
var table = (asBinary ? BICtoANSI : BICtoBCLANSI);
var text = "";
var w;
var x;
var y;
var z;
if (wLength < 0) {
wLength = -wLength;
}
for (x=0; x<wLength; x++) {
w = words[wx+x] || 0;
for (y=0; y<8; y++) {
z = w % 0x40000000000;
c = (w-z)/0x40000000000;
text += String.fromCharCode(table[c]);
w = z*64;
}
}
return text;
}
/**************************************/
function ANSItoWords(bytes, bx, bLength, words, wx, asBinary) {
/* Translates a portion of an ANSI byte array to a sequence of B5500 words.
"bytes" = the Uint8Array byte array
"bx" = 0-relative offset into "bytes"
"bLength" = number of bytes to translate
"words" = the word array
"wx" = 0-relative offset into "words" to store the translated data
"asBinary" = if truthy, then binary translation is done; otherwise
B5500 BCLANSI translation is done */
var cx = 0;
var w = 0;
var table = (asBinary ? ANSItoBIC : BCLANSItoBIC);
var x;
wx = wx || 0;
if (bLength < 0) {
bLength = -bLength;
}
for (x=0; x<bLength; x++) {
if (cx >= 8) {
words[wx++] = w;
w = cx = 0;
}
w = w*64 + table[bytes[bx+x]];
cx++;
}
while (cx++ < 8) {
w *= 64;
}
words[wx++] = w;
}
/**************************************/
function readDiskBlock(addr, segs, block, callback) {
/* Reads a block from the disk "eu" at "addr" for "segs" segments, translates
it to words in the "block" array, then calls "callback" passing the address
and block */
var bx = 0;
var eu;
var euAddr = addr % 1000000;
var euNr = (addr % 10000000 - euAddr)/1000000;
var euName = euPrefix + euNr.toString();
var endAddr = euAddr + segs - 1;
var nextAddr = euAddr;
var range = IDBKeyRange.bound(euAddr, endAddr);
var req;
var txn;
var x;
txn = disk.transaction(euName);
eu = txn.objectStore(euName);
req = eu.openCursor(range);
req.onsuccess = function(ev) {
var cursor = ev.target.result;
if (cursor) {
while (cursor.key > nextAddr) {
for (x=0; x<30; x++) {
block[bx++] = 0;
}
nextAddr++;
}
ANSItoWords(cursor.value, 0, 240, block, bx);
bx += 30;
nextAddr++;
cursor.continue();
} else {
while (nextAddr <= endAddr) {
for (x=0; x<30; x++) {
block[bx++] = 0;
}
nextAddr++;
}
callback(addr, block);
}
};
}
/**************************************/
function normalizeName(name) {
/* Normalizes the name string to match the way file names are stored
in the B5500 directory, i.e., with a leading zero and trailing spaces
to a length of 8 */
var s = "0" + name;
if (s.length > 8) {
s = s.substring(0, 8);
} else {
while (s.length < 8) {
s += " ";
}
}
return s;
}
/**************************************/
function readDiskHeader(block) {
/* Decodes "block" as a B5500 disk header, returning the header object */
var header = {
recordLength: 0,
blockLength: 0,
recordsPerBlock: 0,
segmentsPerBlock: 0,
logCreationDate: 0,
logCreationTime: 0,
lastAccessDate: 0,
creationDate: 0,
fileClass: 0,
fileType: 0,
recordCount: 0,
segmentsPerRow: 0,
maxRows: 0,
rowAddress: [],
words: []};
header.recordLength = fieldIsolate(block[0], 0, 15);
header.blockLength = fieldIsolate(block[0], 15, 15);
header.recordsPerBlock = fieldIsolate(block[0], 30, 12);
header.segmentsPerBlock = fieldIsolate(block[0], 42, 6);
header.logCreationDate = fieldIsolate(block[1], 6, 18);
header.logCreationTime = fieldIsolate(block[1], 25, 23);
header.lastAccessDate = fieldIsolate(block[3], 12, 18);
header.creationDate = fieldIsolate(block[3], 30, 18);
header.fileClass = fieldIsolate(block[4], 9, 2);
header.fileType = fieldIsolate(block[4], 36, 6);
header.recordCount = block[7];
header.segmentsPerRow = block[8];
header.maxRows = fieldIsolate(block[9], 43, 5);
header.rowAddress = block.slice(10);
header.words = block; // save the raw header words
return header;
}
/**************************************/
function fixIt(mfid, fid, headerAddr, headerBlock) {
/* Callback (successor) function to fix up a disk header */
/* This version corrects the record count in SYSTEM/LOG */
var buffer = new Uint8Array(240);
var eu;
var euName = euPrefix + "0";
var h = readDiskHeader(headerBlock);
var txn;
headerBlock[7] = h.segmentsPerRow*h.recordsPerBlock/h.segmentsPerBlock - 1;
txn = disk.transaction([euName], "readwrite");
txn.oncomplete = function(ev) {
alert(mfid + "/" + fid + " fix-up completed successfully");
};
eu = txn.objectStore(euName);
wordsToANSI(headerBlock, 0, 30, buffer, 0);
eu.put(buffer, headerAddr);
}
/**************************************/
function directorySearch(mfid, fid, successor) {
/* Reads the existing directory structure to search for the specified
file named mfid/fid. If found, calls the successor function, passing the
names, disk header address, and disk header block */
var block = new Array(480); // directory block (16 segments)
var f1; // normalized mfid
var f2; // normalized fid
function searchDirBlock(addr, block) {
/* Lists the entries in the current block; if not the last block,
advances to the next block until the file names are found */
var atEnd = false; // searched to end of directory
var bx; // header block index
var found = false; // true if requested file found
var headerBlock; // disk header as Array(30)
var headerAddr; // segment address of header
var n1; // current mfid
var n2; // current fid
var namex; // current index in name segment (0-14)
// Step through the file name entries backwards
for (namex=14; namex>=0; namex--) {
bx = namex*2 + 450;
if (block[bx] == 0x4C) { // 0x4C=@114, end-of-directory marker
atEnd = true;
break;
} else if (block[bx] != 0x0C) { // 0x0C=@14, available directory slot
// Got a live one -- check its names
n1 = wordsToString(block, bx, 1, true);
n2 = wordsToString(block, bx+1, 1, true);
if (f1==n1 && f2==n2) {
found = true;
headerAddr = addr + namex;
bx = namex*30;
headerBlock = block.slice(bx, bx+30);
break;
}
}
}
if (found) {
successor(mfid, fid, headerAddr, headerBlock);
} else if (atEnd) {
spout("File " + mfid + "/" + fid + " not found.");
} else {
readDiskBlock(addr+16, 16, block, searchDirBlock);
}
}
/***** outer block of directorySearch *****/
f1 = normalizeName(mfid);
f2 = normalizeName(fid);
if (!config.EU0) {
alert("No EU0 in disk configuration -- cannot load");
} else {
readDiskBlock(directoryTop+4, 16, block, searchDirBlock);
}
}
/**************************************/
function genericDBError(ev) {
/* Formats a generic alert when otherwise-unhandled database errors occur */
var disk = ev.currentTarget.result;
alert("Database \"" + disk.name + "\" error: " + ev.target.result.error);
}
/**************************************/
function openDatabase(name, version, successor) {
/* Attempts to open the disk subsystem database for the specified "name"
and "version". Stores the IDB database object in "disk" if successful, or
stores null if unsuccessful. Also gets directoryTop from seg 0 */
var block = new Array(30);
var db = null;
var req;
req = window.indexedDB.open(name, version);
req.onerror = function(ev) {
alert("Cannot open disk database: " + ev.target.error);
};
req.onblocked = function(ev) {
alert("Database.open is blocked -- cannot continue");
};
req.onsuccess = function(ev) {
disk = ev.target.result; // save the object reference globally for later use
disk.onerror = genericDBError;
// alert("Disk database opened: " + name + " #" + disk.version);
disk.transaction("CONFIG").objectStore("CONFIG").get(0).onsuccess = function(ev) {
config = ev.target.result;
readDiskBlock(0, 1, block, function(addr, block) {
directoryTop = block[1];
directoryEnd = block[4];
successor();
});
};
};
}
/**************************************/
function checkBrowser() {
/* Checks whether this browser can support the necessary stuff */
var missing = "";
if (!window.File) {missing += ", File"}
if (!window.FileReader) {missing += ", FileReader"}
if (!window.FileList) {missing += ", FileList"}
if (!window.Blob) {missing += ", Blob"}
if (!window.ArrayBuffer) {missing += ", ArrayBuffer"}
if (!window.DataView) {missing += ", DataView"}
if (!window.indexedDB) {missing += ", IndexedDB"}
if (missing.length == 0) {
return false;
} else {
alert("No can do... your browser does not support the following features:\n" +
missing.substring(2));
return true;
}
}
/********** Start of window.onload() **********/
if (!checkBrowser()) {
openDatabase(dbName, dbVersion, function() {
directorySearch("SYSTEM", "LOG", fixIt);
});
}
}, false);
</script>
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BODY {
font-family: Arial, Helvetica, sans-serif;
font-size: small}
TABLE {
border-collapse: collapse}
TH {
vertical-align: bottom}
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text-align: center}
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text-align: right}
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font-family: Courier New, Courier, monospace}
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<div style="position:relative; width:100%; height:3em">
<div style="position:absolute; left:0; top:0; width:auto">
<img src="../webUI/retro-B5500-Logo.png" alt="retro-B5500 Logo" style="float:left">
&nbsp;Disk SYSTEM/LOG Fixer Utility
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<pre id=TextPanel>
</pre>
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