mirror of https://github.com/stella-emu/stella.git
Modified the TIA emulation so that it supports the PAL color loss
effect. Color loss occurs when the previous frame contains an odd number of scanlines. The color loss effect is implemented using an idea from Eckhard Stolberg: "I thought you could have each colour twice in the palette. In the PAL palette the second colour would only be a shade of grey. Then when something gets written to the TIA colour registers, you could set bit0 of the colour according to bit0 of the scanline counter for the last frame. That way an odd number of lines would select the grey tones, while an even number would select the normal colours." git-svn-id: svn://svn.code.sf.net/p/stella/code/trunk@57 8b62c5a3-ac7e-4cc8-8f21-d9a121418aba
This commit is contained in:
bwmott
parent
669c93e662
commit
c3aa637f8a
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@ -13,7 +13,7 @@
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// See the file "license" for information on usage and redistribution of
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// this file, and for a DISCLAIMER OF ALL WARRANTIES.
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//
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// $Id: TIA.cxx,v 1.9 2002-03-28 02:02:24 bwmott Exp $
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// $Id: TIA.cxx,v 1.10 2002-03-28 05:10:17 bwmott Exp $
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//============================================================================
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#include <assert.h>
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@ -35,6 +35,7 @@ TIA::TIA(const Console& console, Sound& sound)
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mySound(sound),
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myPauseState(false),
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myLastSoundUpdateCycle(0),
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myColorLossEnabled(false),
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myCOLUBK(myColor[0]),
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myCOLUPF(myColor[1]),
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myCOLUP0(myColor[2]),
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@ -137,7 +138,7 @@ void TIA::reset()
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myClockAtLastUpdate = myClockWhenFrameStarted;
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myClocksToEndOfScanLine = 228;
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myVSYNCFinishClock = 0x7FFFFFFF;
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myScanlineCountForFrame = 0;
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myScanlineCountForLastFrame = 0;
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// Currently no objects are enabled
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myEnabledObjects = 0;
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@ -215,6 +216,15 @@ void TIA::reset()
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myFrameXStart = 0;
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myFrameWidth = 160;
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}
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if(myConsole.properties().get("Display.Format") == "PAL")
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{
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myColorLossEnabled = true;
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}
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else
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{
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myColorLossEnabled = false;
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}
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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@ -299,6 +309,26 @@ void TIA::update()
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// Reset frame buffer pointer
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myFramePointer = myCurrentFrameBuffer;
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// If color loss is enabled then update the color registers based on
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// the number of scanlines in the last frame that was generated
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if(myColorLossEnabled)
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{
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if(myScanlineCountForLastFrame & 0x01)
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{
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myCOLUP0 |= 0x01010101;
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myCOLUP1 |= 0x01010101;
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myCOLUPF |= 0x01010101;
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myCOLUBK |= 0x01010101;
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}
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else
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{
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myCOLUP0 &= 0xfefefefe;
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myCOLUP1 &= 0xfefefefe;
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myCOLUPF &= 0xfefefefe;
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myCOLUBK &= 0xfefefefe;
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}
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}
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// Execute instructions until frame is finished
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mySystem->m6502().execute(25000);
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@ -306,7 +336,7 @@ void TIA::update()
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// Compute the number of scanlines in the frame
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uInt32 totalClocks = (mySystem->cycles() * 3) - myClockWhenFrameStarted;
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myScanlineCountForFrame = totalClocks / 228;
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myScanlineCountForLastFrame = totalClocks / 228;
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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@ -357,7 +387,7 @@ uInt32 TIA::height() const
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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uInt32 TIA::scanlines() const
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{
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return (uInt32)myScanlineCountForFrame;
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return (uInt32)myScanlineCountForLastFrame;
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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@ -1857,28 +1887,44 @@ void TIA::poke(uInt16 addr, uInt8 value)
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case 0x06: // Color-Luminance Player 0
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{
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uInt32 color = (uInt32)value;
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uInt32 color = (uInt32)(value & 0xfe);
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if(myColorLossEnabled && (myScanlineCountForLastFrame & 0x01))
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{
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color |= 0x01;
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}
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myCOLUP0 = (((((color << 8) | color) << 8) | color) << 8) | color;
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break;
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}
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case 0x07: // Color-Luminance Player 1
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{
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uInt32 color = (uInt32)value;
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uInt32 color = (uInt32)(value & 0xfe);
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if(myColorLossEnabled && (myScanlineCountForLastFrame & 0x01))
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{
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color |= 0x01;
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}
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myCOLUP1 = (((((color << 8) | color) << 8) | color) << 8) | color;
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break;
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}
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case 0x08: // Color-Luminance Playfield
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{
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uInt32 color = (uInt32)value;
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uInt32 color = (uInt32)(value & 0xfe);
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if(myColorLossEnabled && (myScanlineCountForLastFrame & 0x01))
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{
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color |= 0x01;
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}
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myCOLUPF = (((((color << 8) | color) << 8) | color) << 8) | color;
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break;
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}
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case 0x09: // Color-Luminance Background
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{
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uInt32 color = (uInt32)value;
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uInt32 color = (uInt32)(value & 0xfe);
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if(myColorLossEnabled && (myScanlineCountForLastFrame & 0x01))
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{
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color |= 0x01;
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}
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myCOLUBK = (((((color << 8) | color) << 8) | color) << 8) | color;
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break;
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}
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@ -2593,62 +2639,77 @@ const uInt32 TIA::ourNTSCPalette[256] = {
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0x6f6f6f, 0x6f6f6f, 0x8e8e8e, 0x8e8e8e,
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0xaaaaaa, 0xaaaaaa, 0xc0c0c0, 0xc0c0c0,
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0xd6d6d6, 0xd6d6d6, 0xececec, 0xececec,
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0x484800, 0x484800, 0x69690f, 0x69690f,
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0x86861d, 0x86861d, 0xa2a22a, 0xa2a22a,
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0xbbbb35, 0xbbbb35, 0xd2d240, 0xd2d240,
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0xe8e84a, 0xe8e84a, 0xfcfc54, 0xfcfc54,
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0x7c2c00, 0x7c2c00, 0x904811, 0x904811,
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0xa26221, 0xa26221, 0xb47a30, 0xb47a30,
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0xc3903d, 0xc3903d, 0xd2a44a, 0xd2a44a,
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0xdfb755, 0xdfb755, 0xecc860, 0xecc860,
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0x901c00, 0x901c00, 0xa33915, 0xa33915,
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0xb55328, 0xb55328, 0xc66c3a, 0xc66c3a,
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0xd5824a, 0xd5824a, 0xe39759, 0xe39759,
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0xf0aa67, 0xf0aa67, 0xfcbc74, 0xfcbc74,
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0x940000, 0x940000, 0xa71a1a, 0xa71a1a,
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0xb83232, 0xb83232, 0xc84848, 0xc84848,
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0xd65c5c, 0xd65c5c, 0xe46f6f, 0xe46f6f,
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0xf08080, 0xf08080, 0xfc9090, 0xfc9090,
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0x840064, 0x840064, 0x97197a, 0x97197a,
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0xa8308f, 0xa8308f, 0xb846a2, 0xb846a2,
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0xc659b3, 0xc659b3, 0xd46cc3, 0xd46cc3,
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0xe07cd2, 0xe07cd2, 0xec8ce0, 0xec8ce0,
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0x500084, 0x500084, 0x68199a, 0x68199a,
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0x7d30ad, 0x7d30ad, 0x9246c0, 0x9246c0,
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0xa459d0, 0xa459d0, 0xb56ce0, 0xb56ce0,
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0xc57cee, 0xc57cee, 0xd48cfc, 0xd48cfc,
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0x140090, 0x140090, 0x331aa3, 0x331aa3,
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0x4e32b5, 0x4e32b5, 0x6848c6, 0x6848c6,
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0x7f5cd5, 0x7f5cd5, 0x956fe3, 0x956fe3,
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0xa980f0, 0xa980f0, 0xbc90fc, 0xbc90fc,
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0x000094, 0x000094, 0x181aa7, 0x181aa7,
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0x2d32b8, 0x2d32b8, 0x4248c8, 0x4248c8,
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0x545cd6, 0x545cd6, 0x656fe4, 0x656fe4,
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0x7580f0, 0x7580f0, 0x8490fc, 0x8490fc,
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0x001c88, 0x001c88, 0x183b9d, 0x183b9d,
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0x2d57b0, 0x2d57b0, 0x4272c2, 0x4272c2,
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0x548ad2, 0x548ad2, 0x65a0e1, 0x65a0e1,
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0x75b5ef, 0x75b5ef, 0x84c8fc, 0x84c8fc,
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0x003064, 0x003064, 0x185080, 0x185080,
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0x2d6d98, 0x2d6d98, 0x4288b0, 0x4288b0,
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0x54a0c5, 0x54a0c5, 0x65b7d9, 0x65b7d9,
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0x75cceb, 0x75cceb, 0x84e0fc, 0x84e0fc,
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0x004030, 0x004030, 0x18624e, 0x18624e,
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0x2d8169, 0x2d8169, 0x429e82, 0x429e82,
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0x54b899, 0x54b899, 0x65d1ae, 0x65d1ae,
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0x75e7c2, 0x75e7c2, 0x84fcd4, 0x84fcd4,
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0x004400, 0x004400, 0x1a661a, 0x1a661a,
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0x328432, 0x328432, 0x48a048, 0x48a048,
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0x5cba5c, 0x5cba5c, 0x6fd26f, 0x6fd26f,
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0x80e880, 0x80e880, 0x90fc90, 0x90fc90,
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0x143c00, 0x143c00, 0x355f18, 0x355f18,
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0x527e2d, 0x527e2d, 0x6e9c42, 0x6e9c42,
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0x87b754, 0x87b754, 0x9ed065, 0x9ed065,
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0xb4e775, 0xb4e775, 0xc8fc84, 0xc8fc84,
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0x303800, 0x303800, 0x505916, 0x505916,
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0x6d762b, 0x6d762b, 0x88923e, 0x88923e,
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0xa0ab4f, 0xa0ab4f, 0xb7c25f, 0xb7c25f,
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0xccd86e, 0xccd86e, 0xe0ec7c, 0xe0ec7c,
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0x482c00, 0x482c00, 0x694d14, 0x694d14,
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0x866a26, 0x866a26, 0xa28638, 0xa28638,
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0xbb9f47, 0xbb9f47, 0xd2b656, 0xd2b656,
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@ -2661,62 +2722,77 @@ const uInt32 TIA::ourPALPalette[256] = {
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0x525252, 0x525252, 0x767676, 0x767676,
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0x979797, 0x979797, 0xb6b6b6, 0xb6b6b6,
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0xd2d2d2, 0xd2d2d2, 0xececec, 0xececec,
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0x000000, 0x000000, 0x2b2b2b, 0x2b2b2b,
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0x525252, 0x525252, 0x767676, 0x767676,
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0x979797, 0x979797, 0xb6b6b6, 0xb6b6b6,
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0xd2d2d2, 0xd2d2d2, 0xececec, 0xececec,
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0x805800, 0x805800, 0x96711a, 0x96711a,
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0xab8732, 0xab8732, 0xbe9c48, 0xbe9c48,
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0xcfaf5c, 0xcfaf5c, 0xdfc06f, 0xdfc06f,
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0xeed180, 0xeed180, 0xfce090, 0xfce090,
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0x445c00, 0x445c00, 0x5e791a, 0x5e791a,
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0x769332, 0x769332, 0x8cac48, 0x8cac48,
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0xa0c25c, 0xa0c25c, 0xb3d76f, 0xb3d76f,
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0xc4ea80, 0xc4ea80, 0xd4fc90, 0xd4fc90,
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0x703400, 0x703400, 0x89511a, 0x89511a,
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0xa06b32, 0xa06b32, 0xb68448, 0xb68448,
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0xc99a5c, 0xc99a5c, 0xdcaf6f, 0xdcaf6f,
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0xecc280, 0xecc280, 0xfcd490, 0xfcd490,
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0x006414, 0x006414, 0x1a8035, 0x1a8035,
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0x329852, 0x329852, 0x48b06e, 0x48b06e,
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0x5cc587, 0x5cc587, 0x6fd99e, 0x6fd99e,
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0x80ebb4, 0x80ebb4, 0x90fcc8, 0x90fcc8,
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0x700014, 0x700014, 0x891a35, 0x891a35,
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0xa03252, 0xa03252, 0xb6486e, 0xb6486e,
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0xc95c87, 0xc95c87, 0xdc6f9e, 0xdc6f9e,
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0xec80b4, 0xec80b4, 0xfc90c8, 0xfc90c8,
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0x005c5c, 0x005c5c, 0x1a7676, 0x1a7676,
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0x328e8e, 0x328e8e, 0x48a4a4, 0x48a4a4,
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0x5cb8b8, 0x5cb8b8, 0x6fcbcb, 0x6fcbcb,
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0x80dcdc, 0x80dcdc, 0x90ecec, 0x90ecec,
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0x70005c, 0x70005c, 0x841a74, 0x841a74,
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0x963289, 0x963289, 0xa8489e, 0xa8489e,
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0xb75cb0, 0xb75cb0, 0xc66fc1, 0xc66fc1,
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0xd380d1, 0xd380d1, 0xe090e0, 0xe090e0,
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0x003c70, 0x003c70, 0x195a89, 0x195a89,
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0x2f75a0, 0x2f75a0, 0x448eb6, 0x448eb6,
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0x57a5c9, 0x57a5c9, 0x68badc, 0x68badc,
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0x79ceec, 0x79ceec, 0x88e0fc, 0x88e0fc,
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0x580070, 0x580070, 0x6e1a89, 0x6e1a89,
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0x8332a0, 0x8332a0, 0x9648b6, 0x9648b6,
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0xa75cc9, 0xa75cc9, 0xb76fdc, 0xb76fdc,
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0xc680ec, 0xc680ec, 0xd490fc, 0xd490fc,
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0x002070, 0x002070, 0x193f89, 0x193f89,
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0x2f5aa0, 0x2f5aa0, 0x4474b6, 0x4474b6,
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0x578bc9, 0x578bc9, 0x68a1dc, 0x68a1dc,
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0x79b5ec, 0x79b5ec, 0x88c8fc, 0x88c8fc,
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0x340080, 0x340080, 0x4a1a96, 0x4a1a96,
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0x5f32ab, 0x5f32ab, 0x7248be, 0x7248be,
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0x835ccf, 0x835ccf, 0x936fdf, 0x936fdf,
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0xa280ee, 0xa280ee, 0xb090fc, 0xb090fc,
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0x000088, 0x000088, 0x1a1a9d, 0x1a1a9d,
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0x3232b0, 0x3232b0, 0x4848c2, 0x4848c2,
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0x5c5cd2, 0x5c5cd2, 0x6f6fe1, 0x6f6fe1,
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0x8080ef, 0x8080ef, 0x9090fc, 0x9090fc,
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0x805800, 0x000000, 0x96711a, 0x2b2b2b,
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0xab8732, 0x525252, 0xbe9c48, 0x767676,
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0xcfaf5c, 0x979797, 0xdfc06f, 0xb6b6b6,
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0xeed180, 0xd2d2d2, 0xfce090, 0xececec,
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0x445c00, 0x000000, 0x5e791a, 0x2b2b2b,
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0x769332, 0x525252, 0x8cac48, 0x767676,
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0xa0c25c, 0x979797, 0xb3d76f, 0xb6b6b6,
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0xc4ea80, 0xd2d2d2, 0xd4fc90, 0xececec,
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0x703400, 0x000000, 0x89511a, 0x2b2b2b,
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0xa06b32, 0x525252, 0xb68448, 0x767676,
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0xc99a5c, 0x979797, 0xdcaf6f, 0xb6b6b6,
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0xecc280, 0xd2d2d2, 0xfcd490, 0xececec,
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0x006414, 0x000000, 0x1a8035, 0x2b2b2b,
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0x329852, 0x525252, 0x48b06e, 0x767676,
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0x5cc587, 0x979797, 0x6fd99e, 0xb6b6b6,
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0x80ebb4, 0xd2d2d2, 0x90fcc8, 0xececec,
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0x700014, 0x000000, 0x891a35, 0x2b2b2b,
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0xa03252, 0x525252, 0xb6486e, 0x767676,
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0xc95c87, 0x979797, 0xdc6f9e, 0xb6b6b6,
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0xec80b4, 0xd2d2d2, 0xfc90c8, 0xececec,
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0x005c5c, 0x000000, 0x1a7676, 0x2b2b2b,
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0x328e8e, 0x525252, 0x48a4a4, 0x767676,
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0x5cb8b8, 0x979797, 0x6fcbcb, 0xb6b6b6,
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0x80dcdc, 0xd2d2d2, 0x90ecec, 0xececec,
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0x70005c, 0x000000, 0x841a74, 0x2b2b2b,
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0x963289, 0x525252, 0xa8489e, 0x767676,
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0xb75cb0, 0x979797, 0xc66fc1, 0xb6b6b6,
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0xd380d1, 0xd2d2d2, 0xe090e0, 0xececec,
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0x003c70, 0x000000, 0x195a89, 0x2b2b2b,
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0x2f75a0, 0x525252, 0x448eb6, 0x767676,
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0x57a5c9, 0x979797, 0x68badc, 0xb6b6b6,
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0x79ceec, 0xd2d2d2, 0x88e0fc, 0xececec,
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||||
0x580070, 0x000000, 0x6e1a89, 0x2b2b2b,
|
||||
0x8332a0, 0x525252, 0x9648b6, 0x767676,
|
||||
0xa75cc9, 0x979797, 0xb76fdc, 0xb6b6b6,
|
||||
0xc680ec, 0xd2d2d2, 0xd490fc, 0xececec,
|
||||
|
||||
0x002070, 0x000000, 0x193f89, 0x2b2b2b,
|
||||
0x2f5aa0, 0x525252, 0x4474b6, 0x767676,
|
||||
0x578bc9, 0x979797, 0x68a1dc, 0xb6b6b6,
|
||||
0x79b5ec, 0xd2d2d2, 0x88c8fc, 0xececec,
|
||||
|
||||
0x340080, 0x000000, 0x4a1a96, 0x2b2b2b,
|
||||
0x5f32ab, 0x525252, 0x7248be, 0x767676,
|
||||
0x835ccf, 0x979797, 0x936fdf, 0xb6b6b6,
|
||||
0xa280ee, 0xd2d2d2, 0xb090fc, 0xececec,
|
||||
|
||||
0x000088, 0x000000, 0x1a1a9d, 0x2b2b2b,
|
||||
0x3232b0, 0x525252, 0x4848c2, 0x767676,
|
||||
0x5c5cd2, 0x979797, 0x6f6fe1, 0xb6b6b6,
|
||||
0x8080ef, 0xd2d2d2, 0x9090fc, 0xececec,
|
||||
|
||||
0x000000, 0x000000, 0x2b2b2b, 0x2b2b2b,
|
||||
0x525252, 0x525252, 0x767676, 0x767676,
|
||||
0x979797, 0x979797, 0xb6b6b6, 0xb6b6b6,
|
||||
0xd2d2d2, 0xd2d2d2, 0xececec, 0xececec,
|
||||
|
||||
0x000000, 0x000000, 0x2b2b2b, 0x2b2b2b,
|
||||
0x525252, 0x525252, 0x767676, 0x767676,
|
||||
0x979797, 0x979797, 0xb6b6b6, 0xb6b6b6,
|
||||
|
|
|
|||
|
|
@ -8,12 +8,12 @@
|
|||
// SS SS tt ee ll ll aa aa
|
||||
// SSSS ttt eeeee llll llll aaaaa
|
||||
//
|
||||
// Copyright (c) 1995-1998 by Bradford W. Mott
|
||||
// Copyright (c) 1995-2002 by Bradford W. Mott
|
||||
//
|
||||
// See the file "license" for information on usage and redistribution of
|
||||
// this file, and for a DISCLAIMER OF ALL WARRANTIES.
|
||||
//
|
||||
// $Id: TIA.hxx,v 1.3 2002-03-28 02:02:24 bwmott Exp $
|
||||
// $Id: TIA.hxx,v 1.4 2002-03-28 05:10:17 bwmott Exp $
|
||||
//============================================================================
|
||||
|
||||
#ifndef TIA_HXX
|
||||
|
|
@ -38,7 +38,7 @@ class System;
|
|||
be displayed on screen.
|
||||
|
||||
@author Bradford W. Mott
|
||||
@version $Id: TIA.hxx,v 1.3 2002-03-28 02:02:24 bwmott Exp $
|
||||
@version $Id: TIA.hxx,v 1.4 2002-03-28 05:10:17 bwmott Exp $
|
||||
*/
|
||||
class TIA : public Device , public MediaSource
|
||||
{
|
||||
|
|
@ -204,6 +204,11 @@ class TIA : public Device , public MediaSource
|
|||
// Indicates the CPU cycle when a TIA sound register was last updated
|
||||
Int32 myLastSoundUpdateCycle;
|
||||
|
||||
// Indicates if color loss should be enabled or disabled. Color loss
|
||||
// occurs on PAL (and maybe SECAM) systems when the previous frame
|
||||
// contains an odd number of scanlines.
|
||||
bool myColorLossEnabled;
|
||||
|
||||
private:
|
||||
// Pointer to the current frame buffer
|
||||
uInt8* myCurrentFrameBuffer;
|
||||
|
|
@ -252,7 +257,7 @@ class TIA : public Device , public MediaSource
|
|||
Int32 myClocksToEndOfScanLine;
|
||||
|
||||
// Indicates the total number of scanlines generated by the last frame
|
||||
Int32 myScanlineCountForFrame;
|
||||
Int32 myScanlineCountForLastFrame;
|
||||
|
||||
private:
|
||||
// Color clock when VSYNC ending causes a new frame to be started
|
||||
|
|
@ -424,7 +429,9 @@ class TIA : public Device , public MediaSource
|
|||
// Table of RGB values for NTSC
|
||||
static const uInt32 ourNTSCPalette[256];
|
||||
|
||||
// Table of RGB values for PAL
|
||||
// Table of RGB values for PAL. NOTE: The odd numbered entries in
|
||||
// this array are always shades of grey. This is used to implement
|
||||
// the PAL color loss effect.
|
||||
static const uInt32 ourPALPalette[256];
|
||||
|
||||
private:
|
||||
|
|
|
|||
Loading…
Reference in New Issue