mirror of
https://github.com/pkimpel/retro-b5500.git
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27bd443f7c
2. Inhibit peripheral device windows from being closed while emulator is active. 3. Shut down peripheral devices and close their windows as part of cc.powerOff(). 4. Add shut-down code to peripheral drivers. 5. Ensure SPO is ready in cc.load(). 6. Enable emulator version display on B5500Console. 7. Clear DummyPrinter window when it is double-clicked (finally got this working). 8. Fix problem with "/" not accepted by SPO input in Google Chrome. 9. Commit ESPOL binary card loader image. 10. Fix problem with intensity levels in B5500Console NORMAL/CONTROL lights. 11. Attempt to enable emulator and utilities for Safari-style IndexedDB.
115 lines
4.5 KiB
JavaScript
115 lines
4.5 KiB
JavaScript
/***********************************************************************
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* retro-b5500/emulator B5500DummyUnit.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 Dummy/Non-existent Peripheral Unit module.
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*
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* Defines a dummy peripheral unit type that should be instantiated for all
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* non-existent or unimplemented peripheral units in the system. This class
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* defines the full peripheral interface, but immediately reports a non-ready
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* result for all I/O operations that are attempted.
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*
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************************************************************************
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* 2012-12-21 P.Kimpel
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* Original version, from thin air.
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***********************************************************************/
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"use strict";
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/**************************************/
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function B5500DummyUnit(mnemonic, index, designate, statusChange, signal) {
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/* Constructor for the DummyUnit object */
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this.mnemonic = mnemonic; // Unit mnemonic
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this.index = index; // 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.timer = null; // setTimeout() token
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this.initiateStamp = 0; // timestamp of last initiation (set by IOUnit)
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this.clear();
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}
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/**************************************/
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B5500DummyUnit.prototype.clear = function clear() {
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/* Initializes (and if necessary, creates) the processor state */
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this.ready = false; // ready status
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this.busy = false; // busy status
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this.activeIOUnit = 0; // I/O unit currently using this device
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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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};
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/**************************************/
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B5500DummyUnit.prototype.read = function read(finish, buffer, length, mode, control) {
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/* Initiates a read operation on the unit */
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finish(0x04, 0); // report unit not ready
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};
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/**************************************/
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B5500DummyUnit.prototype.space = function space(finish, length, control) {
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/* Initiates a space operation on the unit */
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finish(0x04, 0); // report unit not ready
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};
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/**************************************/
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B5500DummyUnit.prototype.write = function write(finish, buffer, length, mode, control) {
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/* Initiates a write operation on the unit */
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finish(0x04, 0); // report unit not ready
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};
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/**************************************/
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B5500DummyUnit.prototype.erase = function erase(finish, length) {
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/* Initiates an erase operation on the unit */
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finish(0x04, 0); // report unit not ready
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};
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/**************************************/
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B5500DummyUnit.prototype.rewind = function rewind(finish) {
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/* Initiates a rewind operation on the unit */
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finish(0x04, 0); // report unit not ready
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};
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/**************************************/
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B5500DummyUnit.prototype.readCheck = function readCheck(finish, length, control) {
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/* Initiates a read check operation on the unit */
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finish(0x04, 0); // report unit not ready
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};
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/**************************************/
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B5500DummyUnit.prototype.readInterrogate = function readInterrogate(finish, control) {
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/* Initiates a read interrogate operation on the unit */
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finish(0x04, 0); // report unit not ready
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};
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/**************************************/
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B5500DummyUnit.prototype.writeInterrogate = function writeInterrogate(finish, control) {
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/* Initiates a write interrogate operation on the unit */
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finish(0x04, 0); // report unit not ready
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};
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/**************************************/
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B5500DummyUnit.prototype.shutDown = function shutDown() {
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/* Shuts down the device */
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if (this.timer) {
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clearTimeout(this.timer);
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}
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// this device has no window to close
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};
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