mirror of
https://github.com/pkimpel/retro-b5500.git
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999 lines
41 KiB
HTML
999 lines
41 KiB
HTML
<!DOCTYPE html>
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<head>
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<title>B5500 Coldstart Disk Subsystem Loader</title>
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<meta name="Author" content="Paul Kimpel">
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<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
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<meta http-equiv="Content-Script-Type" content="text/javascript">
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<meta http-equiv="Content-Style-Type" content="text/css">
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<script>
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/***********************************************************************
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* retro-b5500/tools B5500ColdLoader.html
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************************************************************************
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* Copyright (c) 2012, Paul Kimpel.
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* Licensed under the MIT License,
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* see http://www.opensource.org/licenses/mit-license.php
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************************************************************************
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* B5500 Coldstart Disk Subsystem Loader.
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*
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* This script opens an IndexedDB database in the browser (creating it first, if
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* necessary) and initializes it as a B5500 Head-per-Track disk file subsystem.
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* It creates, as necessary, a separate IDB object store for for the number of
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* Electronics Units specified by the "euSet" constant, each consisting of the number
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* of 30-word segments (sectors) specified by the "EUn" properties of "euSet".
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*
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* If the ColdStart box is checked on the page, the disk directory structure on
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* EU0 is overwritten with a new, empty directory structure, and a default set of
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* the system parameters are created.
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*
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*
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*=======================================================================
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* The script then reads a Burroughs B5500 Library/Maintenance tape as one
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* large blob and extracts all files, converting the 6-bit B5500 Internal Code
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* (BIC) characters to 8-bit ASCII. All files are extracted.
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*
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* The blob is assumed to be in the so-called ".bcd" format. Each 7-bit frame
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* from the tape is represented as one 8-bit unsigned byte. The low-order six
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* bits (mask 0x3F) contain the character value. The next bit (mask 0x40) is
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* the parity bit, and the high-order bit (mask 0x80) indicates the byte is
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* at the start of a physical tape block. Tape marks (EOF) are indicated by a
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* block containing a single 0x8F byte.
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*
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* The extraction process is driven by the tape directory at the beginning of
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* the tape volume. Continuation "reels" are not currently supported.
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*
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* To use, select the .bcd file using the file selection control on the page.
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* The script writes a log of activity to the web page.
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*
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* This version outputs the converted data by opening a browser window for
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* each file and inserting the converted text into a <textarea> element in
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* that window. From there you can copy the text and paste into another
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* program that can save the data to a local filesystem. This approach is
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* being used until we can figure out a better way to get data out of a
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* browser environment and into a local filesystem. Ugh.
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************************************************************************
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* 2012-12-29 P.Kimpel
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* Original version, from B5500LibMaintExtract.html.
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***********************************************************************/
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"use strict";
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window.onload = function() {
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const configName = "CONFIG"; // database configuration store name
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const dbName = "B5500DiskUnit"; // IDB database name
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const dbVersion = 1; // current IDB database version
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const directoryTop = 2000; // start of directory area
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const directoryEnd = 3008; // end of directory area
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const euSize = 200000; // model I size (5 Storage Units: 6MW or 48MC)
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const euPrefix = "EU"; // prefix for EU object store names
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const tapeMark = 0x8F; // .bcd file tapemark (EOF) octet code
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var config = null; // copy of CONFIG store contents
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var disk = null; // the IDB database object
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var panel = document.getElementById("TextPanel");
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var tapeDir = [];
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var euSet = {EU0: euSize, EU1: euSize};
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var tapeCtl = {
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data: null,
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offset: 0,
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dataLength: -1,
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eof: false,
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eot: false,
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blockCount: 0,
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blockLength: 0};
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var BICtoANSI = [
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"0", "1", "2", "3", "4", "5", "6", "7",
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"8", "9", "#", "@", "?", ":", ">", "}",
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"+", "A", "B", "C", "D", "E", "F", "G",
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"H", "I", ".", "[", "&", "(", "<", "~",
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"|", "J", "K", "L", "M", "N", "O", "P",
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"Q", "R", "$", "*", "-", ")", ";", "{",
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" ", "/", "S", "T", "U", "V", "W", "X",
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"Y", "Z", ",", "%", "!", "=", "]", "\""];
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var pow2 = [ // powers of 2 from 0 to 52
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0x1, 0x2, 0x4, 0x8,
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0x10, 0x20, 0x40, 0x80,
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0x100, 0x200, 0x400, 0x800,
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0x1000, 0x2000, 0x4000, 0x8000,
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0x10000, 0x20000, 0x40000, 0x80000,
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0x100000, 0x200000, 0x400000, 0x800000,
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0x1000000, 0x2000000, 0x4000000, 0x8000000,
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0x10000000, 0x20000000, 0x40000000, 0x80000000,
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0x100000000, 0x200000000, 0x400000000, 0x800000000,
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0x1000000000, 0x2000000000, 0x4000000000, 0x8000000000,
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0x10000000000, 0x20000000000, 0x40000000000, 0x80000000000,
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0x100000000000, 0x200000000000, 0x400000000000, 0x800000000000,
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0x1000000000000, 0x2000000000000, 0x4000000000000, 0x8000000000000,
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0x10000000000000];
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function $$(id) {
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return document.getElementById(id);
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}
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function bit(word, bit) {
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/* Extracts and returns the specified bit from the word */
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var e = 47-bit; // word lower power exponent
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var p; // bottom portion of word power of 2
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if (e > 0) {
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return ((word - word % (p = pow2[e]))/p) % 2;
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} else {
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return word % 2;
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}
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};
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function fieldIsolate(word, start, width) {
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/* Extracts a bit field [start:width] from word and returns the field */
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var le = 48-start-width; // lower power exponent
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var p; // bottom portion of word power of 2
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return (le == 0 ? word : (word - word % (p = pow2[le]))/p) % pow2[width];
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};
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function spout(text) {
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/* Appends "text"+NL as a new text node to the panel DOM element */
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var e = document.createTextNode(text + "\n");
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panel.appendChild(e);
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}
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function clearPanel() {
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/* Clears the text panel */
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var kid;
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while (kid = panel.firstChild) {
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panel.removeChild(kid);
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}
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}
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function parseNumber(s) {
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/* Parses the string "s" as a base-10 number. Returns 0 if it is not a number */
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var n = parseInt(s, 10);
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return (isNaN(n) ? 0 : n);
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}
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function rtrim(s) {
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/* Trims trailing spaces from "s" and returns the resulting string */
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var m = s.match(/^(.*?) *$/);
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return m[1];
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}
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function padToLength(text, len) {
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/* Converts the input string "text" to exactly "len" characters,
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truncating or padding on the right with spaces as necessary */
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var x = text.length;
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if (x > len) {
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return text.substring(0, len);
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} else {
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x = len-x;
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while (x-- > 0) {
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text += " ";
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}
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return text;
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}
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}
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function stringToANSI(text, bytes, bx) {
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/* Translates the characters in a string to ANSI byte-array format.
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"text" is the input string, "bytes" is the Uint8Array output buffer,
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and "bx" is the offset into that output buffer */
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var len = text.length;
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var x;
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for (x=0; x<len; x++) {
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bytes[bx++] = text.charCodeAt(x) & 0xFF;
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}
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}
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function wordsToANSI(words, wx, wLength, bytes, bx) {
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/* Translates an array of B5500 words to ANSI byte-array format.
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"words" = the array of words
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"wx" = the starting index in "words"
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"wLength" = the number of words to translate
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"bytes" = a Uint8Array array
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"bx" = the starting index in "bytes" to store the translated data */
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var c;
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var w;
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var x;
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var y;
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var z;
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for (x=0; x<wLength; x++) {
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w = words[x+wx] || 0;
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for (y=0; y<8; y++) {
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z = w % 0x40000000000;
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c = (w-z)/0x40000000000;
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bytes[bx++] = BICtoANSI[c].charCodeAt(0);
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w = z*64;
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}
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}
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}
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function readTextBlock(ctl) {
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/* Reads the next block from the tape, translating the character frames to ANSI
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character codes and returning the data as a string. A block is terminated when
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the next frame has its high-order bit set, or the end of the data is reached.
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The string returned is always at least one character in length, unless the block
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is a tapeMark (in which case the "eof" property is set) or the end of the data
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has been reached (in which case the "eof" and "eot" properties are set) */
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var c;
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var data = ctl.data;
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var limit = ctl.dataLength;
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var text = "";
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var x = ctl.offset;
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if (x >= limit) {
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ctl.eof = true;
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ctl.eot = true;
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ctl.blockLength = 0;
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} else {
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c = data.getUint8(x);
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if (c == tapeMark) {
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ctl.eof = true;
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ctl.offset = x+1;
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ctl.blockLength = 0;
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} else {
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do {
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text += BICtoANSI[c & 0x3F];
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if (++x < limit) {
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c = data.getUint8(x);
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} else {
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c = tapeMark; // to kill the loop
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}
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} while (c < 128);
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ctl.eof = false;
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ctl.blockLength = x - ctl.offset;
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ctl.offset = x;
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ctl.blockCount++;
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}
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}
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return text;
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}
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function readWordBlock(ctl) {
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/* Reads the next block from the tape, translating the character frames to an array
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of B5500 binary words and returning the array. A block is terminated when
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the next frame has its high-order bit set, or the end of the data is reached.
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The array returned is always at least one element in length, unless the block
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is a tapeMark (in which case the "eof" property is set) or the end of the data
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has been reached (in which case the "eof" and "eot" properties are set) */
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var c;
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var data = ctl.data;
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var limit = ctl.dataLength;
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var w = 0;
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var words = [];
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var wx = 0;
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var x = ctl.offset;
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if (x >= limit) {
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ctl.eof = true;
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ctl.eot = true;
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ctl.blockLength = 0;
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} else {
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c = data.getUint8(x);
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if (c == tapeMark) {
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ctl.eof = true;
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ctl.offset = x+1;
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ctl.blockLength = 0;
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} else {
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do {
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if (wx < 8) {
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w = w*64 + (c & 0x3F);
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wx++;
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} else {
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words.push(w);
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w = c & 0x3F;
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wx = 1;
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}
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if (++x < limit) {
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c = data.getUint8(x);
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} else {
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c = tapeMark; // to kill the loop
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}
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} while (c < 128);
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// Right-justify the last word as necessary
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while (wx++ < 8) {
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w *= 64;
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}
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words.push(w);
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ctl.eof = false;
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ctl.blockLength = x - ctl.offset;
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ctl.offset = x;
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ctl.blockCount++;
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}
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}
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return words;
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}
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function readTapeLabel(ctl) {
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/* Reads the next block from the tape and determines if it is a B5500 tape label.
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If so, decodes the label into a label object and returns the object */
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var rec;
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var s;
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var lab = {
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isLabel: false,
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text: "",
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heading: "",
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mfid: "",
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fid: "",
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reel: 0,
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dateWritten:0,
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cycle: 0,
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datePurge: 0,
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sentinel: 0,
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blockCount: 0,
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recordCount:0,
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memdumpKey: 0,
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tapeNumber: ""};
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rec = readTextBlock(ctl);
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if (!ctl.eof) {
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lab.text = rec;
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if (ctl.blockLength == 80 && (s = rec.substring(0, 8)) == " LABEL ") {
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lab.isLabel = true;
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lab.heading = s;
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lab.mfid = rec.substring(9, 16);
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lab.fid = rec.substring(17, 24);
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lab.reel = parseNumber(rec.substring(24, 27));
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lab.dateWritten = parseNumber(rec.substring(27, 32));
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lab.cycle = parseNumber(rec.substring(32, 34));
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lab.datePurge = parseNumber(rec.substring(34, 39));
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lab.sentinel = parseNumber(rec.substring(39, 40));
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lab.blockCount = parseNumber(rec.substring(40, 45));
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lab.recordCount = parseNumber(rec.substring(45, 52));
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lab.memdumpKey = parseNumber(rec.substring(52, 53));
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lab.tapeNumber = rec.substring(53, 58);
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}
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}
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return lab;
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}
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function readTapeDirectory(ctl) {
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/* Reads the Lib/Maint tape directory and returns and array of file names, indexed
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starting at 1. If the directory is invalid, returns an empty array */
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var dir = [];
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var done;
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var fid;
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var lab;
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var lab2;
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var mfid;
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var rec;
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var w;
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var x;
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lab = readTapeLabel(ctl);
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if (ctl.eof) {
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spout("TapeDir: EOF encountered when tape label expected, block=" + ctl.blockCount);
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} else if (!lab.isLabel) {
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spout(lab.text);
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spout("TapeDir: Above block encountered when a tape label was expected, block=" + ctl.blockCount);
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} else {
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dir.push(rtrim(lab.mfid) + "/" + rtrim(lab.fid)); // store the tape name in dir[0]
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rec = readTextBlock(ctl);
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if (!ctl.eof) {
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spout("TapeDir: EOF expected after starting label, block=" + ctl.blockCount);
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}
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do {
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rec = readTextBlock(ctl);
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if (!ctl.eof) {
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x = 0;
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done = false;
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do {
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if (x+8 > rec.length) {
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spout("TapeDir: No terminating entry, block=" + ctl.blockCount + ", x=" + x);
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done = true;
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} else if (rec.substring(x, x+8) == "0000000?") {
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done = true;
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} else if (x+16 > rec.length) {
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spout("TapeDir: Truncated directory entry, block=" + ctl.blockCount + ", x=" + x);
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done = true;
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} else {
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mfid = rec.substring(x+1, x+8);
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fid = rec.substring(x+9, x+16);
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dir.push(rtrim(mfid) + "/" + rtrim(fid));
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x += 16;
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}
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} while (!done);
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}
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} while (!ctl.eof);
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lab2 = readTapeLabel(ctl);
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if (!lab2.isLabel) {
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spout("TapeDir: Tape label expected after directory, block=" + ctl.blockCount);
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} else if (lab2.mfid != lab.mfid || lab2.fid != lab.fid) {
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spout("TapeDir: Directory ending label mismatch, block=" + ctl.blockCount);
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}
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}
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return dir;
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}
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function readDiskHeader(ctl) {
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/* Reads the next block from the tape blob and (partially) decodes it as a B5500
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disk header, returning the header object */
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var block;
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var header = {
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recordLength: 0,
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blockLength: 0,
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recordsPerBlock: 0,
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segmentsPerBlock: 0,
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logCreationDate: 0,
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logCreationTime: 0,
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lastAccessDate: 0,
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creationDate: 0,
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fileClass: 0,
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fileType: 0,
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recordCount: 0,
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segmentsPerRow: 0,
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maxRows: 0,
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rowAddress: []};
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block = readWordBlock(ctl);
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if (ctl.eof) {
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spout("DiskHeader: EOF encountered reading header, block=" + ctl.blockCount);
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} else if (block.length < 11) {
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spout("DiskHeader: header too short, got " + block.length + ", block=" + ctl.blockCount);
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} else {
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header.recordLength = fieldIsolate(block[0], 0, 15);
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header.blockLength = fieldIsolate(block[0], 15, 15);
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header.recordsPerBlock = fieldIsolate(block[0], 30, 12);
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header.segmentsPerBlock = fieldIsolate(block[0], 42, 6);
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header.logCreationDate = fieldIsolate(block[1], 6, 18);
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header.logCreationTime = fieldIsolate(block[1], 25, 23);
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header.lastAccessDate = fieldIsolate(block[3], 12, 18);
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header.creationDate = fieldIsolate(block[3], 30, 18);
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header.fileClass = fieldIsolate(block[4], 9, 2);
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header.fileType = fieldIsolate(block[4], 36, 6);
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header.recordCount = block[7];
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header.segmentsPerRow = block[8];
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header.maxRows = fieldIsolate(block[9], 43, 5);
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header.rowAddress = block.slice(10);
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}
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return header;
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}
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function extractFileRow(ctl, header, box, recs) {
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/* Extracts the next row from the tape blob and writes it one record at a time to
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the "box" textarea object. "recs" is the number of records converted at entry to the
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routine. Returns the number of records converted */
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var block;
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var blockChars = header.blockLength*8;
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var blockRecs = 0;
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var bx = 0;
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var done = false;
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var recChars = header.recordLength*8;
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var rowRecs = 0;
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var rx = 0;
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var segs = 0;
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var text = "";
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var value = "";
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// Assemble the row data from tape blocks
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do {
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block = readTextBlock(ctl);
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if (ctl.eof) {
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done = true;
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} else {
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text += block;
|
|
segs += Math.floor((block.length+239)/240);
|
|
if (segs >= header.segmentsPerRow) {
|
|
done = true;
|
|
}
|
|
}
|
|
} while (!done);
|
|
|
|
// Loop through the file blocks within the row data
|
|
while (bx < text.length) {
|
|
rx = bx;
|
|
blockRecs = header.recordsPerBlock;
|
|
while (blockRecs > 0) {
|
|
if (rx >= text.length) {
|
|
blockRecs = 0;
|
|
} else if (recs+rowRecs > header.recordCount) {
|
|
blockRecs = 0;
|
|
bx = text.length;
|
|
} else {
|
|
value += (text.substring(rx, rx+recChars) + "\n");
|
|
rx += recChars;
|
|
rowRecs++;
|
|
blockRecs--;
|
|
}
|
|
}
|
|
bx += blockChars;
|
|
}
|
|
box.value += value;
|
|
return rowRecs;
|
|
}
|
|
|
|
function extractFile(ctl, fileNr, fileName) {
|
|
/* Extracts the next file in sequence from the tape blob, converts the data
|
|
from BIC to ASCII, and writes it to a new window object within the browser.
|
|
Returns true if no more files should be converted */
|
|
var block;
|
|
var box;
|
|
var header;
|
|
var lab;
|
|
var lab2;
|
|
var recs = 0;
|
|
var result = false;
|
|
var rowCount = 0;
|
|
var text;
|
|
var win;
|
|
var x;
|
|
|
|
spout(" ");
|
|
spout("Extracting #" + fileNr + ": " + fileName);
|
|
lab = readTapeLabel(ctl);
|
|
if (ctl.eof) {
|
|
spout("Extract: EOF encountered when tape label expected, block=" + ctl.blockCount);
|
|
} else if (!lab.isLabel) {
|
|
spout(lab.text);
|
|
spout("Extract: Above block encountered when a tape label was expected, block=" + ctl.blockCount);
|
|
} else {
|
|
block = readWordBlock(ctl);
|
|
if (!ctl.eof) {
|
|
spout("TapeDir: EOF expected after starting label, block=" + ctl.blockCount);
|
|
}
|
|
header = readDiskHeader(ctl);
|
|
spout(" " + lab.mfid + "/" + lab.fid +
|
|
": REC=" + header.recordLength +
|
|
", BLK=" + header.blockLength +
|
|
", RPB=" + header.recordsPerBlock +
|
|
", SPB=" + header.segmentsPerBlock +
|
|
", LCD=" + header.logCreationDate +
|
|
", LCT=" + header.logCreationTime +
|
|
", LAD=" + header.lastAccessDate +
|
|
", CRD=" + header.creationDate +
|
|
", FCL=" + header.fileClass +
|
|
", FTY=" + header.fileType +
|
|
", CNT=" + header.recordCount +
|
|
", SPR=" + header.segmentsPerRow +
|
|
", MXR=" + header.maxRows);
|
|
|
|
text = " Rows @ [";
|
|
for (x=0; x<header.rowAddress.length; x++) {
|
|
if (x>0) {
|
|
text += ", ";
|
|
}
|
|
text += header.rowAddress[x].toString(10);
|
|
if (header.rowAddress[x] != 0) {
|
|
rowCount++;
|
|
}
|
|
}
|
|
spout(text + "], allocated=" + rowCount);
|
|
|
|
text = "Tape " + rtrim(lab.mfid) + "/" + rtrim(lab.fid) + ": " + fileName;
|
|
win = window.open("", lab.fid, "width=800,height=600,status,scrollbars");
|
|
win.status = text;
|
|
win.moveTo((screen.availWidth - 800)/2, (screen.availHeight - 600)/2);
|
|
win.focus();
|
|
|
|
win.document.body.appendChild(
|
|
win.document.createElement("tt").appendChild(
|
|
win.document.createTextNode(text)));
|
|
win.document.body.appendChild(win.document.createElement("br"));
|
|
box = win.document.createElement("textarea");
|
|
box.cols = 90;
|
|
box.rows = 30;
|
|
win.document.body.appendChild(box);
|
|
|
|
while (!ctl.eof) {
|
|
recs += extractFileRow(ctl, header, box, recs);
|
|
}
|
|
|
|
lab2 = readTapeLabel(ctl);
|
|
if (!lab2.isLabel) {
|
|
spout("Extract: Tape label expected after file data, block=" + ctl.blockCount);
|
|
} else if (lab2.mfid != lab.mfid || lab2.fid != lab.fid) {
|
|
spout("Extract: File ending label mismatch, block=" + ctl.blockCount);
|
|
}
|
|
spout(" " + lab2.mfid + "/" + lab2.fid + ": records=" + recs);
|
|
|
|
box.focus();
|
|
box.select();
|
|
result = !confirm("Copy and save " + fileName + " from the sub-window.\n" +
|
|
"Then click OK to continue or Cancel to quit.");
|
|
win.close();
|
|
}
|
|
return result;
|
|
}
|
|
|
|
function fileLoader_onLoad(ev) {
|
|
/* Handle the onload event for an ArrayBuffer FileReader */
|
|
var buf = ev.target.result;
|
|
var data = new DataView(buf); // use DataView() to avoid problems with littleendians.
|
|
var tapeDir;
|
|
var text = "";
|
|
var x = 0;
|
|
|
|
clearPanel();
|
|
tapeCtl.data = data;
|
|
tapeCtl.offset = 0;
|
|
tapeCtl.dataLength = buf.byteLength;
|
|
tapeCtl.eof = false;
|
|
tapeCtl.eot = false;
|
|
tapeCtl.blockCount = 0;
|
|
|
|
tapeDir = readTapeDirectory(tapeCtl);
|
|
for (x=0; x<tapeDir.length; x++) {
|
|
spout(tapeDir[x]);
|
|
}
|
|
|
|
for (x=1; x<tapeDir.length; x++) {
|
|
if (extractFile(tapeCtl, x, tapeDir[x])) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
function fileSelector_onChange(ev) {
|
|
/* Handle the <input type=file> onchange event when a file is selected */
|
|
var f = ev.target.files[0];
|
|
var reader = new FileReader();
|
|
|
|
//alert("File selected: " + f.name +
|
|
// "\nModified " + f.lastModifiedDate +
|
|
// "\nType=" + f.type + ", Size=" + f.size + " octets");
|
|
|
|
reader.onload = fileLoader_onLoad;
|
|
reader.readAsArrayBuffer(f);
|
|
}
|
|
|
|
function initializeDisk() {
|
|
/* Performs a B5500 Cold Start by initializing the directory structure on
|
|
the disk, overwriting (and destroying) whatever else was there before */
|
|
var buffer = new Uint8Array(240);
|
|
var eu;
|
|
var euName = euPrefix + "0";
|
|
var fileLabels = new Uint8Array(240);
|
|
var fileNr = 0;
|
|
var info = [];
|
|
var segNr;
|
|
var shar = [];
|
|
var txn;
|
|
var zeroes = new Uint8Array(240);
|
|
var x;
|
|
|
|
function loadBootstrap(eu, buffer) {
|
|
/* Creates the Halt/Load Button Card image and stores it in segment 1 */
|
|
var w = [];
|
|
|
|
w[ 0] = parseInt("0441341003604231", 8);
|
|
w[ 1] = parseInt("7500000000000023", 8);
|
|
w[ 2] = parseInt("0211001441310435", 8);
|
|
w[ 3] = parseInt("7012700704210014", 8);
|
|
w[ 4] = parseInt("4411005441314155", 8);
|
|
w[ 5] = parseInt("6461106500000425", 8);
|
|
w[ 6] = parseInt("0074013100644131", 8);
|
|
w[ 7] = parseInt("0000006200644131", 8);
|
|
w[ 8] = parseInt("0000006601044131", 8);
|
|
w[ 9] = parseInt("0000007201244131", 8);
|
|
w[10] = parseInt("0000007601444131", 8);
|
|
w[11] = parseInt("5140000040700137", 8);
|
|
w[12] = parseInt("5140000047700461", 8);
|
|
w[13] = parseInt("5140000047704223", 8);
|
|
w[14] = parseInt("7700000000000037", 8);
|
|
w[15] = parseInt("0153020404050000", 8);
|
|
w[16] = parseInt("0167010604410440", 8);
|
|
w[17] = parseInt("0163010604410010", 8);
|
|
w[18] = parseInt("0157010604410660", 8);
|
|
w[19] = parseInt("0600017205204131", 8);
|
|
wordsToANSI(w, 0, 30, buffer, 0);
|
|
eu.put(buffer, 1);
|
|
}
|
|
|
|
function enterFile(mfid, fid, areas, areasize, eu, buffer, directoryTop, labels, fileNr, segNr) {
|
|
/* Enters a file into the disk directory. The loader will only create
|
|
one directory block, so do not call this routine more than 15 times.
|
|
Only the first row is allocated. Returns the next available segment address */
|
|
var header = [];
|
|
var labelx = 240-(fileNr+1)*16;
|
|
|
|
stringToANSI(padToLength(mfid, 7), labels, labelx+1);
|
|
stringToANSI(padToLength(fid, 7), labels, labelx+9);
|
|
if (labelx > 15) {
|
|
stringToANSI("0000001?", labels, labelx-16); // @114, last-entry marker
|
|
stringToANSI("00000000", labels, labelx-8);
|
|
}
|
|
header[0] = 0x41; // BIC "11" = @0101 = 1 rec/block, 1 seg/block
|
|
header[3] = 0x1001200; // Date: BIC "00010180" = 1980-01-01
|
|
header[7] = areas*areasize-1;
|
|
header[8] = areasize;
|
|
header[9] = areas;
|
|
header[10] = segNr;
|
|
wordsToANSI(header, 0, 30, buffer, 0);
|
|
eu.put(buffer, directoryTop + 18 - fileNr);
|
|
|
|
return segNr + areasize;
|
|
}
|
|
|
|
/***** Start of initializeDisk *****/
|
|
wordsToANSI(shar, 0, 30, zeroes, 0); // create a segment buffer of zeroes
|
|
wordsToANSI(shar, 0, 30, fileLabels, 0); // initialize the file name label block
|
|
|
|
// Start a transaction
|
|
txn = disk.transaction([euName, "CONFIG"], "readwrite");
|
|
txn.oncomplete = function(ev) {
|
|
alert("Cold Start completed successfully");
|
|
};
|
|
|
|
eu = txn.objectStore(euName);
|
|
txn.objectStore("CONFIG").get(0).onsuccess = function(ev) {
|
|
config = ev.target.result;
|
|
if (!config) {
|
|
alert("No CONFIG object in database");
|
|
txn.abort();
|
|
} else {
|
|
// Initialize the directory labels segment
|
|
stringToANSI("0000001?", fileLabels, 14*16); // @114, last-entry marker
|
|
stringToANSI("00000000", fileLabels, 14*16+8);
|
|
|
|
// Initialize segment 0
|
|
shar[ 0] = 1; // number of shared-disk systems
|
|
shar[ 1] = directoryTop;
|
|
shar[ 2] = 0;
|
|
shar[ 3] = 0;
|
|
shar[ 4] = directoryEnd; // DIRECT deck option
|
|
wordsToANSI(shar, 0, 30, buffer, 0);
|
|
eu.put(buffer, 0);
|
|
|
|
// Load the Halt Load Button Card image
|
|
loadBootstrap(eu, buffer); // load the Halt/Load Button Card image
|
|
|
|
// Clean out the ESPDISK area
|
|
for (x=50; x<directoryTop; x++) {
|
|
eu.put(zeroes, x);
|
|
}
|
|
|
|
// Initialize the DIRECTORYTOP segment
|
|
info[ 0] = // option word
|
|
// 47: use DRA
|
|
// 46: use DRB
|
|
pow2[47-45] + // 45: print BOJ
|
|
pow2[47-44] + // 44: print EOJ
|
|
pow2[47-43] + // 43: type file open
|
|
pow2[47-42] + // 42: call TERMINATE procedure
|
|
pow2[47-41] + // 41: initialize date @ H/L
|
|
pow2[47-40] + // 40: initialize time @ H/L
|
|
// 39: use only one breakout tape
|
|
// 38: automatically print pbt
|
|
pow2[47-37] + // 37: clear write ready status @ terminal
|
|
pow2[47-36] + // 36: write disc. code on terminal
|
|
pow2[47-35] + // 35: type when compiler files open & close
|
|
pow2[47-34] + // 34: type file close
|
|
pow2[47-33] + // 33: error msgs when progr recovery used
|
|
pow2[47-32] + // 32: type MT retention messages
|
|
pow2[47-31] + // 31: type library messages
|
|
pow2[47-30] + // 30: type schedule messages
|
|
pow2[47-29] + // 29: type file security messages
|
|
pow2[47-28] + // 28: prevent I/O below user disk area
|
|
pow2[47-27] + // 27: prevent disk RELEASE statement
|
|
pow2[47-26] + // 26: printer backup disk release
|
|
pow2[47-25] + // 25: check memory links
|
|
pow2[47-24] + // 24: type disk error messages
|
|
pow2[47-23] + // 23: disk logging
|
|
pow2[47-22] + // 22: suppress library error messages
|
|
pow2[47-21] + // 21: go to printer back-up only
|
|
pow2[47-20] + // 20: dont stack files on PB tapes
|
|
pow2[47-19] + // 19: print set or reset messages
|
|
// 18: no user disk will unload expired
|
|
pow2[47-17] + // 17: run all decks(SHAREDISK)
|
|
// 16: olay core to ECM(AUXMEM)
|
|
pow2[47-15] + // 15: job core estimates(STATISTICS)
|
|
// 14: olay data to ECM(AUXMEM)
|
|
pow2[47-13] + // 13: makes system hang on-should HL msg
|
|
// 12: enables datacom(TSS, if not DCP)
|
|
pow2[47-11] + // 11: library messages for CANDE
|
|
pow2[47-10] + // 10: ZIP decks to run on batch(SHAREDISK)
|
|
// 9: controls running of batch jobs on TSS
|
|
// 8: UNUSED
|
|
// 7: UNUSED
|
|
// 6: UNUSED
|
|
// 5: UNUSED
|
|
// 4: UNUSED
|
|
// 3: UNUSED
|
|
pow2[47- 2] + // 2: Model III I/O channels
|
|
// 1: UNUSED
|
|
0; // 0: (flag bit)
|
|
|
|
info[ 1] = 0x1001200; // Date: BIC "00010180" = 1980-01-01
|
|
info[ 2] = config.eus; // number of EUs
|
|
info[ 3] = 0; // not used
|
|
info[ 4] = directoryEnd; // DIRECT deck option
|
|
info[ 5] = 0; // last number used for control deck
|
|
info[ 6] = 0; // first control deck queued
|
|
info[ 7] = 0; // last control deck queued
|
|
info[ 8] = 0; // next number available for printer backup disk
|
|
info[ 9] = 1; // multiprocessing core factor
|
|
info[10] = 0; // SPO stations (through info[15])
|
|
info[11] = 0;
|
|
info[12] = 0;
|
|
info[13] = 0;
|
|
info[14] = 0;
|
|
info[15] = 0;
|
|
info[16] = 15; // Q value for datacom input
|
|
wordsToANSI(info, 0, 30, buffer, 0);
|
|
eu.put(buffer, directoryTop);
|
|
|
|
// Create a file entry for the system log
|
|
segNr = directoryEnd + 1;
|
|
segNr = enterFile("SYSTEM", "LOG", 1, 20000, eu, buffer, directoryTop, fileLabels, fileNr, segNr);
|
|
fileNr++;
|
|
|
|
// Store the directory labels segment
|
|
eu.put(fileLabels, directoryTop + 19); // write the directory block file labels
|
|
}
|
|
};
|
|
|
|
}
|
|
|
|
function configureDatabase(ev) {
|
|
/* Handles the onupgradeneeded event for the database */
|
|
var configStore = null;
|
|
var disk = ev.target.result;
|
|
var stores = disk.objectStoreNames;
|
|
|
|
function configureEUs(configStore, config) {
|
|
var euName;
|
|
|
|
// Note: for now we will not worry about shrinking or deleting EUs that
|
|
// are in conflict with the contents of euSet.
|
|
|
|
for (euName in euSet) {
|
|
if (euName.indexOf("EU") == 0) {
|
|
if (!config[euName]) {
|
|
config[euName] = euSet[euName];
|
|
}
|
|
if (stores.contains(euName)) {
|
|
if (euSet[euName] > config[euName]) {
|
|
config[euName] = euSet[euName];
|
|
}
|
|
} else {
|
|
config[euName] = euSet[euName];
|
|
config.eus++;
|
|
disk.createObjectStore(euName);
|
|
}
|
|
}
|
|
}
|
|
configStore.put(config, 0);
|
|
}
|
|
|
|
if (stores.contains(configName)) {
|
|
configStore = disk.transaction(configName).objectStore(configName);
|
|
configStore.get(0).onsuccess = function(ev) {
|
|
config = ev.target.result || {eus:0};
|
|
configureEUs(configStore, config);
|
|
};
|
|
} else {
|
|
config = {eus:0};
|
|
configStore = disk.createObjectStore(configName);
|
|
configureEUs(configStore, config);
|
|
}
|
|
}
|
|
|
|
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 dumpDisk() {
|
|
/* Dumps the initial and directory portions of the disk */
|
|
var txn = disk.transaction("EU0");
|
|
var eu = txn.objectStore("EU0");
|
|
var range = IDBKeyRange.upperBound(directoryTop+20);
|
|
var req = eu.openCursor(range);
|
|
var lastKey = -1;
|
|
|
|
spout("===== START OF DISK DUMP =====");
|
|
req.onsuccess = function(ev) {
|
|
var cursor = ev.target.result;
|
|
|
|
if (cursor) {
|
|
if (cursor.key-lastKey > 1) {
|
|
spout("----- " + (cursor.key-lastKey-1) + " unallocated segments -----");
|
|
}
|
|
spout(cursor.key + ": " + String.fromCharCode.apply(null, cursor.value));
|
|
lastKey = cursor.key;
|
|
cursor.continue();
|
|
} else {
|
|
spout("===== END OF DISK DUMP =====");
|
|
}
|
|
};
|
|
}
|
|
|
|
function openDatabase(name, version) {
|
|
/* Attempts to open the disk subsystem database for the specified "name"
|
|
and "version". Returns the IDB database object if successful, or null if
|
|
unsuccessful */
|
|
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
|
|
alert("Disk database opened: " + name + " #" + disk.version);
|
|
disk.onerror = genericDBError;
|
|
$$("ColdstartBtn").disabled = false;
|
|
|
|
dumpDisk(); // <<<<<<<<<<<<<< DEBUG <<<<<<<<<<<<<<<<<
|
|
};
|
|
|
|
req.onupgradeneeded = configureDatabase;
|
|
return db;
|
|
}
|
|
|
|
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()) {
|
|
$$("FileSelector").addEventListener("change", fileSelector_onChange, false);
|
|
$$("ColdstartBtn").addEventListener("click", function(ev) {
|
|
if (confirm("Are you sure you want to do a COLD START?")) {
|
|
initializeDisk();
|
|
}
|
|
}, false);
|
|
openDatabase(dbName, dbVersion);
|
|
}
|
|
}
|
|
</script>
|
|
</head>
|
|
|
|
<body>
|
|
|
|
<div style="position:relative; width:100%; height:3em">
|
|
<div style="position:absolute; left:0; top:0; width:auto">
|
|
retro-B5500 Coldstart Disk SubSystem Loader
|
|
</div>
|
|
<div style="text-align:center">
|
|
<input id=ColdstartBtn type=button DISABLED value="Cold Start">
|
|
</div>
|
|
<div style="position:absolute; top:0; right:0; width:auto">
|
|
<input id=FileSelector type=file size=60>
|
|
</div>
|
|
|
|
</div>
|
|
|
|
<pre id=TextPanel>
|
|
</pre>
|
|
|
|
</body>
|
|
</html> |