mirror of
https://github.com/pkimpel/retro-b5500.git
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72fca54c23
2. Fix normalization and rounding problems in Processor. 3. Fix Card-Load-Select -- emulator now boots from cards. 4. Commit LDCNTRL label and end cards to source CONTROL.DECK.job 5. Delete unused activeIOUnit property in all I/O drivers. 6. Change CardReader to reset file selector control when hopper becomes empty, instead of when START button is clicked. 7. Minor adjustments to CentralControl annunciator layout and behavior on Console. 8. Increase SPO paper scroll-back to 1500 lines (was 500). 9. Correct Card-Load-Select behavior in SyllableDebugger. 10. Implement setCallback() to replace setImmediate() in SyllableDebugger.
114 lines
4.4 KiB
JavaScript
114 lines
4.4 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.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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