mirror of
https://github.com/pkimpel/retro-b5500.git
synced 2026-02-12 19:27:39 +00:00
2260803c51
1. Initial implementation of a datacom terminal. 2. Initial implementation (read-only) of magnetic tape drives. 3. Further work towards getting P2 to function (but not working yet). 4. Allow device driver classes to be optionally included in the global UI script. 5. Fix callback arguments handling in SetCallback. 6. Decrease width of SPO window slightly. 7. Improve trapping and printing of SPO keystrokes, based on datacom implementation. 8. Minor performance tuning improvements. 9. Dump raw header words in octal in tools/B5500DiskDirList.html script. 10. New wiki pages and several updates to existing ones.
555 lines
21 KiB
JavaScript
555 lines
21 KiB
JavaScript
/***********************************************************************
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* retro-b5500/emulator B5500SPOUnit.js
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************************************************************************
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* Copyright (c) 2012, Nigel Williams and Paul Kimpel.
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* Licensed under the MIT License, see
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* http://www.opensource.org/licenses/mit-license.php
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************************************************************************
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* B5500 SPO Peripheral Unit module.
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*
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* Defines a SPO peripheral unit type that implements the Supervisory
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* Print Out device on the operator's console.
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*
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************************************************************************
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* 2012-12-22 P.Kimpel
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* Original version, from B5500DummyUnit.js.
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***********************************************************************/
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"use strict";
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/**************************************/
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function B5500SPOUnit(mnemonic, unitIndex, designate, statusChange, signal) {
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/* Constructor for the SPOUnit object */
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this.maxScrollLines = 1500; // Maximum amount of printer scrollback
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this.charPeriod = 100; // Printer speed, milliseconds per character
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this.mnemonic = mnemonic; // Unit mnemonic
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this.unitIndex = unitIndex; // Ready-mask bit number
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this.designate = designate; // IOD unit designate number
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this.statusChange = statusChange; // external function to call for ready-status change
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this.signal = signal; // external function to call for special signals (e.g,. SPO input request)
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this.initiateStamp = 0; // timestamp of last initiation (set by IOUnit)
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this.inTimer = null; // input setCallback() token
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this.outTimer = null; // output setCallback() token
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this.clear();
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this.window = window.open("", mnemonic);
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if (this.window) {
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this.shutDown(); // destroy any previously-existing window
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this.window = null;
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}
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this.doc = null;
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this.paper = null;
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this.endOfPaper = null;
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this.window = window.open("../webUI/B5500SPOUnit.html", mnemonic,
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"scrollbars,resizable,width=688,height=508");
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this.window.moveTo(screen.availWidth-this.window.outerWidth, screen.availHeight-this.window.outerHeight);
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this.window.addEventListener("load", B5500CentralControl.bindMethod(B5500SPOUnit.prototype.spoOnload, this), false);
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}
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// this.spoState enumerations
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B5500SPOUnit.prototype.spoLocal = 1;
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B5500SPOUnit.prototype.spoRemote = 2;
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B5500SPOUnit.prototype.spoInput = 3;
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B5500SPOUnit.prototype.spoOutput = 4;
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B5500SPOUnit.prototype.keyFilter = [ // Filter keyCode values to valid BIC ones
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0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F, // 00-0F
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0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F,0x3F, // 10-1F
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0x20,0x21,0x22,0x23,0x24,0x25,0x26,0x3F,0x28,0x29,0x2A,0x2B,0x2C,0x2D,0x2E,0x2F, // 20-2F
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0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,0x3A,0x3B,0x3C,0x3D,0x3E,0x3F, // 30-3F
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0x40,0x41,0x42,0x43,0x44,0x45,0x46,0x47,0x48,0x49,0x4A,0x4B,0x4C,0x4D,0x4E,0x4F, // 40-4F
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0x50,0x51,0x52,0x53,0x54,0x55,0x56,0x57,0x58,0x59,0x5A,0x5B,0x3F,0x5D,0x3F,0x3F, // 50-5F
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0x3F,0x41,0x42,0x43,0x44,0x45,0x46,0x47,0x48,0x49,0x4A,0x4B,0x4C,0x4D,0x4E,0x4F, // 60-6F
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0x50,0x51,0x52,0x53,0x54,0x55,0x56,0x57,0x58,0x59,0x5A,0x7B,0x7C,0x7D,0x7E,0x3F]; // 70-7F
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/**************************************/
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B5500SPOUnit.prototype.$$ = function $$(e) {
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return this.doc.getElementById(e);
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};
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/**************************************/
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B5500SPOUnit.prototype.clear = function clear() {
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/* Initializes (and if necessary, creates) the SPO unit state */
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this.ready = false; // ready status
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this.busy = false; // busy status
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this.errorMask = 0; // error mask for finish()
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this.finish = null; // external function to call for I/O completion
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this.buffer = null;
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this.bufLength = 0;
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this.bufIndex = 0;
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this.printCol = 0;
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this.nextCharTime = 0;
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this.spoState = this.spoLocal; // Current state of SPO interface
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this.spoLocalRequested = false; // LOCAL button pressed while active
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};
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/**************************************/
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B5500SPOUnit.prototype.hasClass = function hasClass(e, name) {
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/* returns true if element "e" has class "name" in its class list */
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var classes = e.className;
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if (!e) {
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return false;
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} else if (classes == name) {
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return true;
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} else {
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return (classes.search("\\b" + name + "\\b") >= 0);
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}
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};
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/**************************************/
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B5500SPOUnit.prototype.addClass = function addClass(e, name) {
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/* Adds a class "name" to the element "e"s class list */
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if (!this.hasClass(e, name)) {
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e.className += (" " + name);
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}
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};
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/**************************************/
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B5500SPOUnit.prototype.removeClass = function removeClass(e, name) {
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/* Removes the class "name" from the element "e"s class list */
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e.className = e.className.replace(new RegExp("\\b" + name + "\\b\\s*", "g"), "");
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};
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/**************************************/
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B5500SPOUnit.prototype.setLocal = function setLocal() {
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/* Sets the status of the SPO to Local */
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this.spoLocalRequested = false;
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this.spoState = this.spoLocal;
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this.addClass(this.$$("SPOLocalBtn"), "yellowLit");
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this.removeClass(this.$$("SPORemoteBtn"), "yellowLit");
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this.removeClass(this.$$("SPOInputRequestBtn"), "yellowLit");
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this.statusChange(0);
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// Set up to echo characters from the keyboard
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this.buffer = null;
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this.bufLength = 0;
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this.bufIndex = 0;
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this.nextCharTime = new Date().getTime();
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this.finish = null;
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};
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/**************************************/
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B5500SPOUnit.prototype.setRemote = function setRemote() {
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/* Sets the status of the SPO to Remote */
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if (this.spoState == this.spoLocal) {
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this.spoState = this.spoRemote;
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this.spoLocalRequested = false;
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this.addClass(this.$$("SPORemoteBtn"), "yellowLit");
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this.removeClass(this.$$("SPOLocalBtn"), "yellowLit");
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this.statusChange(1);
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}
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};
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/**************************************/
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B5500SPOUnit.prototype.appendEmptyLine = function appendEmptyLine() {
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/* Removes excess lines already printed, then appends a new <pre> element
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to the <iframe>, creating an empty text node inside the new element */
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var count = this.paper.childNodes.length;
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var line = this.doc.createTextNode("");
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this.printChar(0x0A); // newline
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while (count-- > this.maxScrollLines) {
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this.paper.removeChild(this.paper.firstChild);
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}
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this.endOfPaper.scrollIntoView();
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this.paper.appendChild(line);
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this.printCol = 0;
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};
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/**************************************/
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B5500SPOUnit.prototype.backspaceChar = function backspaceChar() {
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/* Handles backspace for SPO input */
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var line = this.paper.lastChild;
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if (this.bufLength > 0) {
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this.bufIndex--;
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}
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if (this.printCol > 0) {
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this.printCol--;
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}
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if (line.nodeValue.length > 0) {
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line.nodeValue = line.nodeValue.substring(0, line.nodeValue.length-1);
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}
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};
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/**************************************/
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B5500SPOUnit.prototype.printChar = function printChar(c) {
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/* Echoes the character code "c" to the SPO printer */
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var line = this.paper.lastChild.nodeValue;
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var len = line.length;
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if (len < 1) {
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line = String.fromCharCode(c);
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this.printCol++;
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} else if (len < 72) {
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line += String.fromCharCode(c);
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this.printCol++;
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} else {
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line = line.substring(0, 71) + String.fromCharCode(c);
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}
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this.paper.lastChild.nodeValue = line;
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};
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/**************************************/
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B5500SPOUnit.prototype.outputChar = function outputChar() {
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/* Outputs one character from the buffer to the SPO. If more characters remain
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to be printed, schedules itself 100 ms later to print the next one, otherwise
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calls finished(). If the column counter exceeds 72, a CR/LF pair is output.
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A CR/LF pair is also output at the end of the message */
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var nextTime = this.nextCharTime + this.charPeriod;
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var delay = nextTime - new Date().getTime();
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this.nextCharTime = nextTime;
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if (this.printCol < 72) { // print the character
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if (this.bufIndex < this.bufLength) {
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this.printChar(this.buffer[this.bufIndex]);
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this.bufIndex++;
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this.outTimer = setCallback(this.outputChar, this, delay);
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} else { // set up for the final CR/LF
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this.printCol = 72;
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this.outTimer = setCallback(this.outputChar, this, delay);
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}
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} else if (this.printCol == 72) { // delay to fake the output of a carriage-return
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this.printCol++;
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this.outTimer = setCallback(this.outputChar, this, delay+this.charPeriod);
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} else { // actually output the CR/LF
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this.appendEmptyLine();
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if (this.bufIndex < this.bufLength) {
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this.outTimer = setCallback(this.outputChar, this, delay);
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} else { // message text is exhausted
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this.finish(this.errorMask, this.bufLength); // report finish with any errors
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if (this.spoLocalRequested) {
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this.setLocal();
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} else {
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this.spoState = this.spoRemote;
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}
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}
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}
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};
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/**************************************/
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B5500SPOUnit.prototype.terminateInput = function terminateInput() {
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/* Handles the End of Message event. Turns off the Ready lamp, then
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calls outputChar(), which will find bufIndex==bufLength, output a new-line,
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set the state to Remote, and call finish() for us. Slick, eh? */
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if (this.spoState == this.spoInput) {
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this.removeClass(this.$$("SPOReadyBtn"), "yellowLit");
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this.bufLength = this.bufIndex;
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this.nextCharTime = new Date().getTime();
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this.outputChar();
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}
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};
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/**************************************/
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B5500SPOUnit.prototype.cancelInput = function cancelInput() {
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/* Handles the Error message event. This is identical to terminateInput(),
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but it also sets a parity error so the input message will be rejected */
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if (this.spoState == this.spoInput) {
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this.errorMask |= 0x10; // set parity/error-button bit
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this.terminateInput();
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}
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};
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/**************************************/
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B5500SPOUnit.prototype.keyPress = function keyPress(ev) {
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/* Handles keyboard character events. Depending on the state of the unit,
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either buffers the character for transmission to the I/O Unit, simply echos
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it to the printer, or ignores it altogether */
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var c = ev.charCode;
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var delay;
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var index = this.bufLength;
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var nextTime;
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var stamp = new Date().getTime();
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nextTime = (this.nextCharTime > stamp ? this.nextCharTime : stamp) + this.charPeriod;
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delay = nextTime - stamp;
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if (this.spoState == this.spoInput) {
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if (c >= 32 && c < 126) {
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this.buffer[this.bufIndex++] = c = this.keyFilter[c];
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this.inTimer = setCallback(this.printChar, this, delay, c);
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this.nextCharTime = nextTime;
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ev.preventDefault();
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}
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if (c == 126) { // "~" (B5500 group-mark)
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c = this.keyFilter[c];
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this.inTimer = setCallback(this.printChar, this, delay, c);
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this.nextCharTime = nextTime + this.charPeriod;
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this.terminateInput();
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ev.preventDefault();
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}
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} else if (this.spoState == this.spoLocal) {
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if (c >= 32 && c <= 126) {
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c = this.keyFilter[c];
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this.inTimer = setCallback(this.printChar, this, delay, c);
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this.nextCharTime = nextTime;
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ev.preventDefault();
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}
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}
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};
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/**************************************/
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B5500SPOUnit.prototype.keyDown = function keyDown(ev) {
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/* Handles key-down events to capture ESC, BS, and Enter keystrokes */
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var c = ev.keyCode;
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var delay;
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var nextTime;
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var stamp = new Date().getTime();
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nextTime = (this.nextCharTime > stamp ? this.nextCharTime : stamp) + this.charPeriod;
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delay = nextTime - stamp;
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switch (c) {
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case 0x1B: // ESC
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switch (this.spoState) {
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case this.spoRemote:
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case this.spoOutput:
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this.addClass(this.$$("SPOInputRequestBtn"), "yellowLit");
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this.signal();
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ev.preventDefault();
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break;
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case this.spoInput:
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this.cancelInput();
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ev.preventDefault();
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break;
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}
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break;
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case 0x08: // Backspace
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switch (this.spoState) {
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case this.spoInput:
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case this.spoLocal:
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this.inTimer = setCallback(this.backspaceChar, this, delay);
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this.nextCharTime = nextTime;
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ev.preventDefault();
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break;
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}
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break;
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case 0x0D: // Enter
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switch (this.spoState) {
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case this.spoInput:
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this.terminateInput();
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this.nextCharTime = nextTime;
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ev.preventDefault();
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break;
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case this.spoLocal:
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this.inTimer = setCallback(this.appendEmptyLine, this, delay+this.charPeriod);
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this.nextCharTime = nextTime;
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ev.preventDefault();
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break;
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}
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break;
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}
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};
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/**************************************/
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B5500SPOUnit.prototype.printText = function printText(msg, finish) {
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/* Utility function to convert a string to a Typed Array buffer and queue
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it for printing. This is intended only for printing an initialization message
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in Local state */
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var buf = new Uint8Array(msg.length);
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var length = msg.length;
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var x;
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for (x=0; x<length; x++) {
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buf[x] = msg.charCodeAt(x);
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}
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this.buffer = buf;
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this.bufLength = length;
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this.bufIndex = 0;
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this.printCol = 0;
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this.nextCharTime = new Date().getTime();
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this.finish = finish;
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this.outputChar(); // start the printing process
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};
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/**************************************/
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B5500SPOUnit.prototype.beforeUnload = function beforeUnload(ev) {
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var msg = "Closing this window will make the device unusable.\n" +
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"Suggest you stay on the page and minimize this window instead";
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ev.preventDefault();
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ev.returnValue = msg;
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return msg;
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};
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/**************************************/
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B5500SPOUnit.prototype.spoOnload = function spoOnload() {
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/* Initializes the SPO window and user interface */
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var x;
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this.doc = this.window.document;
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this.doc.title = "retro-B5500 " + this.mnemonic;
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this.paper = this.doc.createElement("pre");
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this.paper.appendChild(this.doc.createTextNode(""));
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this.$$("SPOUT").contentDocument.body.appendChild(this.paper);
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this.endOfPaper = this.doc.createElement("div");
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this.endOfPaper.appendChild(this.doc.createTextNode("\xA0"));
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this.$$("SPOUT").contentDocument.body.appendChild(this.endOfPaper);
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this.$$("SPOUT").contentDocument.head.innerHTML += "<style>" +
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"BODY {background-color: white} " +
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"PRE {margin: 0; font-size: 8pt; font-family: Lucida Sans Typewriter, Courier New, Courier, monospace}" +
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"</style>";
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this.window.focus();
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this.window.addEventListener("beforeunload", this.beforeUnload, false);
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this.window.addEventListener("keypress", B5500CentralControl.bindMethod(B5500SPOUnit.prototype.keyPress, this), false);
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this.$$("SPOUT").contentDocument.body.addEventListener("keypress", B5500CentralControl.bindMethod(B5500SPOUnit.prototype.keyPress, this), false);
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this.window.addEventListener("keydown", B5500CentralControl.bindMethod(B5500SPOUnit.prototype.keyDown, this), false);
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this.$$("SPOUT").contentDocument.body.addEventListener("keydown", B5500CentralControl.bindMethod(B5500SPOUnit.prototype.keyDown, this), false);
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this.$$("SPORemoteBtn").addEventListener("click", B5500CentralControl.bindMethod(B5500SPOUnit.prototype.setRemote, this), false);
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this.$$("SPOLocalBtn").addEventListener("click", B5500CentralControl.bindMethod(function localClick() {
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if (this.spoState == this.spoRemote) {
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this.setLocal();
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} else {
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this.spoLocalRequested = true;
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}
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}, this), false);
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this.$$("SPOInputRequestBtn").addEventListener("click", B5500CentralControl.bindMethod(function inputRequestClick() {
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if (this.spoState == this.spoRemote || this.spoState == this.spoOutput) {
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this.addClass(this.$$("SPOInputRequestBtn"), "yellowLit");
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this.signal();
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}
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}, this), false);
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this.$$("SPOErrorBtn").addEventListener("click", B5500CentralControl.bindMethod(B5500SPOUnit.prototype.cancelInput, this), false);
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this.$$("SPOEndOfMessageBtn").addEventListener("click", B5500CentralControl.bindMethod(B5500SPOUnit.prototype.terminateInput, this), false);
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for (x=0; x<32; x++) {
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this.appendEmptyLine();
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}
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this.printText("retro-B5500 Emulator Version " + B5500CentralControl.version, B5500CentralControl.bindMethod(function initComplete() {
|
|
this.window.focus();
|
|
this.setRemote();
|
|
this.appendEmptyLine();
|
|
}, this));
|
|
};
|
|
|
|
/**************************************/
|
|
B5500SPOUnit.prototype.read = function read(finish, buffer, length, mode, control) {
|
|
/* Initiates a read operation on the unit */
|
|
|
|
this.errorMask = 0;
|
|
switch (this.spoState) {
|
|
case this.spoRemote:
|
|
this.spoState = this.spoInput;
|
|
this.addClass(this.$$("SPOReadyBtn"), "yellowLit");
|
|
this.removeClass(this.$$("SPOInputRequestBtn"), "yellowLit");
|
|
this.buffer = buffer;
|
|
this.bufLength = length;
|
|
this.bufIndex = 0;
|
|
this.nextCharTime = new Date().getTime();
|
|
this.finish = finish;
|
|
//this.window.focus(); // interferes with datacom terminal window
|
|
break;
|
|
case this.spoOutput:
|
|
case this.spoInput:
|
|
finish(0x01, 0); // report unit busy (should never happen)
|
|
break;
|
|
default:
|
|
finish(0x04, 0); // report unit not ready
|
|
break;
|
|
}
|
|
};
|
|
|
|
/**************************************/
|
|
B5500SPOUnit.prototype.space = function space(finish, length, control) {
|
|
/* Initiates a space operation on the unit */
|
|
|
|
finish(0x04, 0); // report unit not ready
|
|
};
|
|
|
|
/**************************************/
|
|
B5500SPOUnit.prototype.write = function write(finish, buffer, length, mode, control) {
|
|
/* Initiates a write operation on the unit */
|
|
|
|
this.errorMask = 0;
|
|
switch (this.spoState) {
|
|
case this.spoRemote:
|
|
this.spoState = this.spoOutput;
|
|
this.buffer = buffer;
|
|
this.bufLength = length;
|
|
this.bufIndex = 0;
|
|
this.nextCharTime = this.initiateStamp;
|
|
this.finish = finish;
|
|
//this.window.focus(); // interferes with datacom terminal window
|
|
this.outputChar(); // start the printing process
|
|
break;
|
|
case this.spoOutput:
|
|
case this.spoInput:
|
|
finish(0x01, 0); // report unit busy (should never happen)
|
|
break;
|
|
default:
|
|
finish(0x04, 0); // report unit not ready
|
|
break;
|
|
}
|
|
};
|
|
|
|
/**************************************/
|
|
B5500SPOUnit.prototype.erase = function erase(finish, length) {
|
|
/* Initiates an erase operation on the unit */
|
|
|
|
finish(0x04, 0); // report unit not ready
|
|
};
|
|
|
|
/**************************************/
|
|
B5500SPOUnit.prototype.rewind = function rewind(finish) {
|
|
/* Initiates a rewind operation on the unit */
|
|
|
|
finish(0x04, 0); // report unit not ready
|
|
};
|
|
|
|
/**************************************/
|
|
B5500SPOUnit.prototype.readCheck = function readCheck(finish, length, control) {
|
|
/* Initiates a read check operation on the unit */
|
|
|
|
finish(0x04, 0); // report unit not ready
|
|
};
|
|
|
|
/**************************************/
|
|
B5500SPOUnit.prototype.readInterrogate = function readInterrogate(finish, control) {
|
|
/* Initiates a read interrogate operation on the unit */
|
|
|
|
finish(0x04, 0); // report unit not ready
|
|
};
|
|
|
|
/**************************************/
|
|
B5500SPOUnit.prototype.writeInterrogate = function writeInterrogate(finish, control) {
|
|
/* Initiates a write interrogate operation on the unit */
|
|
|
|
finish(0x04, 0); // report unit not ready
|
|
};
|
|
|
|
/**************************************/
|
|
B5500SPOUnit.prototype.shutDown = function shutDown() {
|
|
/* Shuts down the device */
|
|
|
|
if (this.inTimer) {
|
|
clearTimeout(this.inTimer);
|
|
}
|
|
if (this.outTimer) {
|
|
clearTimeout(this.outTimer);
|
|
}
|
|
this.window.removeEventListener("beforeunload", this.beforeUnload, false);
|
|
this.window.close();
|
|
};
|