/*
* Copyright notice
*
* (c) 2009 Tim de Koning - Kingsquare Information Services. All rights reserved.
*
* Original version fc64 by Darron Schall and Claus Wahlers
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
nl.kingsquare.c64.memory.io.CIA2 = nl.kingsquare.core.memory.io.IOHandler.extend({
init: function(debugFlag/*:Boolean*/) {
this.cname = 'CIA2';
if (typeof debugFlag == 'undefined') debugFlag = false;
this._super(debugFlag);
this.arr[2] = 0x3f; // init DRA
},
updateTimers: function(cycles/*:uint*/)/*:void*/ {
},
getDataPortA: function(index/*:int*/)/*:int*/ {
if(this.debug) this.debugMessage("[CIA2] get PRA: #$" + nl.kingsquare.core.misc.Convert.toHex(this.arr[index]));
return this.arr[index];
},
setDataPortA: function(index/*:int*/, value/*:int*/)/*:void*/ {
this.arr[index] = value;
this.vicBaseAddr = (~value & 0x03) << 14;
if(this.debug) this.debugMessage("[CIA2] set PRA: #$" + nl.kingsquare.core.misc.Convert.toHex(value) + " vicbase:" + nl.kingsquare.core.misc.Convert.toHex(this.vicBaseAddr, 4));
},
getDataPortB: function(index/*:int*/)/*:int*/ {
if(this.debug) this.debugMessage("[CIA2] get PRB: #$" + nl.kingsquare.core.misc.Convert.toHex(this.arr[index]));
return (~this.arr[3] & 0xff) | (this.arr[3] & this.arr[index]);
},
setDataPortB: function(index/*:int*/, value/*:int*/)/*:void*/ {
this.arr[index] = value;
if(this.debug) this.debugMessage("[CIA2] set PRB: #$" + nl.kingsquare.core.misc.Convert.toHex(value));
},
setLoTimerA: function(index/*:int*/, value/*:int*/)/*:void*/ {
this.timerLatchA = (this.timerLatchA & 0xff00) | value;
if(this.debug) this.debugMessage("[CIA2] set TAL: #$" + nl.kingsquare.core.misc.Convert.toHex(value) + " (Timer A Latch: #$" + nl.kingsquare.core.misc.Convert.toHex(this.timerLatchA, 4) + ")");
},
setHiTimerA: function(index/*:int*/, value/*:int*/)/*:void*/ {
this.timerLatchA = (this.timerLatchA & 0x00ff) | (value * 256);
if(this.debug) this.debugMessage("[CIA2] set TAH: #$" + nl.kingsquare.core.misc.Convert.toHex(value) + " (Timer A Latch: #$" + nl.kingsquare.core.misc.Convert.toHex(this.timerLatchA, 4) + ")");
},
setLoTimerB: function(index/*:int*/, value/*:int*/)/*:void*/ {
this.timerLatchB = (this.timerLatchB & 0xff00) | value;
if(this.debug) this.debugMessage("[CIA2] set TBL: #$" + nl.kingsquare.core.misc.Convert.toHex(value) + " (Timer B Latch: #$" + nl.kingsquare.core.misc.Convert.toHex(this.timerLatchB, 4) + ")");
},
setHiTimerB: function(index/*:int*/, value/*:int*/)/*:void*/ {
this.timerLatchB = (this.timerLatchB & 0x00ff) | (value * 256);
if(this.debug) this.debugMessage("[CIA2] set TBH: #$" + nl.kingsquare.core.misc.Convert.toHex(value) + " (Timer B Latch: #$" + nl.kingsquare.core.misc.Convert.toHex(this.timerLatchB, 4) + ")");
},
initHandlers: function()/*:void*/ {
var self = this;
this.handlers = [
// the CIA2 chip has 16 registers:
new nl.kingsquare.core.memory.io.IOHandlerInfo(function(index) { return self.getDataPortA(index); }, function(index, value) { self.setDataPortA(index, value); }), // 00
new nl.kingsquare.core.memory.io.IOHandlerInfo(function(index) { return self.getDataPortB(index); }, function(index, value) { self.setDataPortB(index, value); }), // 01
new nl.kingsquare.core.memory.io.IOHandlerInfo(function(index) { return self.getDefault(index); }, function(index, value) { self.setDefault(index, value); }), // 02
new nl.kingsquare.core.memory.io.IOHandlerInfo(function(index) { return self.getDefault(index); }, function(index, value) { self.setDefault(index, value); }), // 03
new nl.kingsquare.core.memory.io.IOHandlerInfo(function(index) { return self.getDefault(index); }, function(index, value) { self.setLoTimerA(index, value); }), // 04
new nl.kingsquare.core.memory.io.IOHandlerInfo(function(index) { return self.getDefault(index); }, function(index, value) { self.setHiTimerA(index, value); }), // 05
new nl.kingsquare.core.memory.io.IOHandlerInfo(function(index) { return self.getDefault(index); }, function(index, value) { self.setLoTimerB(index, value); }), // 06
new nl.kingsquare.core.memory.io.IOHandlerInfo(function(index) { return self.getDefault(index); }, function(index, value) { self.setHiTimerB(index, value); }), // 07
new nl.kingsquare.core.memory.io.IOHandlerInfo(function(index) { return self.getDefault(index); }, function(index, value) { self.setDefault(index, value); }), // 08
new nl.kingsquare.core.memory.io.IOHandlerInfo(function(index) { return self.getDefault(index); }, function(index, value) { self.setDefault(index, value); }), // 09
new nl.kingsquare.core.memory.io.IOHandlerInfo(function(index) { return self.getDefault(index); }, function(index, value) { self.setDefault(index, value); }), // 0a
new nl.kingsquare.core.memory.io.IOHandlerInfo(function(index) { return self.getDefault(index); }, function(index, value) { self.setDefault(index, value); }), // 0b
new nl.kingsquare.core.memory.io.IOHandlerInfo(function(index) { return self.getDefault(index); }, function(index, value) { self.setDefault(index, value); }), // 0c
new nl.kingsquare.core.memory.io.IOHandlerInfo(function(index) { return self.getDefault(index); }, function(index, value) { self.setDefault(index, value); }), // 0d
new nl.kingsquare.core.memory.io.IOHandlerInfo(function(index) { return self.getDefault(index); }, function(index, value) { self.setDefault(index, value); }), // 0e
new nl.kingsquare.core.memory.io.IOHandlerInfo(function(index) { return self.getDefault(index); }, function(index, value) { self.setDefault(index, value); }) // 0f
];
}
});
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