mirror of https://github.com/stella-emu/stella.git
Added 'EFSC', which is basically 'EF' bankswitching with 128 bytes of
Superchip RAM. git-svn-id: svn://svn.code.sf.net/p/stella/code/trunk@1692 8b62c5a3-ac7e-4cc8-8f21-d9a121418aba
This commit is contained in:
stephena
parent
7e0355dd55
commit
cba58f1295
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@ -17,6 +17,10 @@
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* Added support for 'EF' bankswitching (Paul Slocum Homestar Runner),
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as well as auto-detection of this format.
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* Added support for 'EFSC' bankswitching, as well as auto-detection of
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this format. This is similar to the 'EF' scheme, but also includes
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128 bytes SuperChip RAM.
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* Improved autodetection for 'UA' bankswitching format.
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-Have fun!
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@ -2571,6 +2571,7 @@ Ms Pac-Man (Stella extended codes):
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<tr><td>E0 </td><td>8K Parker Bros </td></tr>
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<tr><td>E7 </td><td>16K M-network </td></tr>
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<tr><td>EF </td><td>64K Homestar Runner </td></tr>
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<tr><td>EFSC </td><td>64K Homestar Runner + ram</td></tr>
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<tr><td>F4 </td><td>32K Atari </td></tr>
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<tr><td>F4SC </td><td>32K Atari + ram </td></tr>
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<tr><td>F6 </td><td>16K Atari </td></tr>
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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: Cart.cxx,v 1.49 2009-04-05 18:59:56 stephena Exp $
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// $Id: Cart.cxx,v 1.50 2009-04-05 20:18:41 stephena Exp $
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//============================================================================
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#include <cassert>
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@ -33,6 +33,7 @@
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#include "CartE0.hxx"
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#include "CartE7.hxx"
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#include "CartEF.hxx"
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#include "CartEFSC.hxx"
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#include "CartF4.hxx"
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#include "CartF4SC.hxx"
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#include "CartF6.hxx"
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@ -111,6 +112,8 @@ Cartridge* Cartridge::create(const uInt8* image, uInt32 size,
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cartridge = new CartridgeE7(image);
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else if(type == "EF")
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cartridge = new CartridgeEF(image);
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else if(type == "EFSC")
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cartridge = new CartridgeEFSC(image);
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else if(type == "F4")
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cartridge = new CartridgeF4(image);
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else if(type == "F4SC")
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@ -269,7 +272,11 @@ string Cartridge::autodetectType(const uInt8* image, uInt32 size)
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else if(isProbably4A50(image, size))
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type = "4A50";
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else if(isProbablyEF(image, size))
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{
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type = "EF";
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if(isProbablySC(image, size))
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type = "EFSC";
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}
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else
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type = "MB";
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}
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@ -0,0 +1,225 @@
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//============================================================================
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//
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// SSSS tt lll lll
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// SS SS tt ll ll
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// SS tttttt eeee ll ll aaaa
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// SSSS tt ee ee ll ll aa
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// SS tt eeeeee ll ll aaaaa -- "An Atari 2600 VCS Emulator"
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// SS SS tt ee ll ll aa aa
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// SSSS ttt eeeee llll llll aaaaa
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//
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// Copyright (c) 1995-2009 by Bradford W. Mott and the Stella team
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//
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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: CartEFSC.cxx,v 1.1 2009-04-05 20:18:41 stephena Exp $
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//============================================================================
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#include <cassert>
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#include <cstring>
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#include "Random.hxx"
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#include "System.hxx"
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#include "CartEFSC.hxx"
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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CartridgeEFSC::CartridgeEFSC(const uInt8* image)
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{
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// Copy the ROM image into my buffer
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memcpy(myImage, image, 65536);
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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CartridgeEFSC::~CartridgeEFSC()
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{
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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void CartridgeEFSC::reset()
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{
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// Initialize RAM with random values
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class Random random;
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for(uInt32 i = 0; i < 128; ++i)
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myRAM[i] = random.next();
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// Upon reset we switch to bank 1
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bank(1);
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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void CartridgeEFSC::install(System& system)
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{
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mySystem = &system;
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uInt16 shift = mySystem->pageShift();
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uInt16 mask = mySystem->pageMask();
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// Make sure the system we're being installed in has a page size that'll work
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assert((0x1000 & mask) == 0);
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// Set the page accessing methods for the hot spots
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System::PageAccess access;
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for(uInt32 i = (0x1FE0 & ~mask); i < 0x2000; i += (1 << shift))
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{
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access.directPeekBase = 0;
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access.directPokeBase = 0;
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access.device = this;
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mySystem->setPageAccess(i >> shift, access);
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}
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// Set the page accessing method for the RAM writing pages
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for(uInt32 j = 0x1000; j < 0x1080; j += (1 << shift))
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{
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access.device = this;
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access.directPeekBase = 0;
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access.directPokeBase = &myRAM[j & 0x007F];
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mySystem->setPageAccess(j >> shift, access);
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}
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// Set the page accessing method for the RAM reading pages
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for(uInt32 k = 0x1080; k < 0x1100; k += (1 << shift))
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{
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access.device = this;
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access.directPeekBase = &myRAM[k & 0x007F];
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access.directPokeBase = 0;
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mySystem->setPageAccess(k >> shift, access);
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}
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// Install pages for bank 1
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bank(1);
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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uInt8 CartridgeEFSC::peek(uInt16 address)
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{
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address = address & 0x0FFF;
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// Switch banks if necessary
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if((address >= 0x0FE0) && (address <= 0x0FEF))
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bank(address - 0x0FE0);
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// NOTE: This does not handle accessing RAM, however, this function
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// should never be called for RAM because of the way page accessing
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// has been setup
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return myImage[myCurrentBank * 4096 + address];
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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void CartridgeEFSC::poke(uInt16 address, uInt8)
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{
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address = address & 0x0FFF;
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// Switch banks if necessary
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if((address >= 0x0FE0) && (address <= 0x0FEF))
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bank(address - 0x0FE0);
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// NOTE: This does not handle accessing RAM, however, this function
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// should never be called for RAM because of the way page accessing
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// has been setup
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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void CartridgeEFSC::bank(uInt16 bank)
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{
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if(myBankLocked) return;
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// Remember what bank we're in
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myCurrentBank = bank;
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uInt16 offset = myCurrentBank * 4096;
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uInt16 shift = mySystem->pageShift();
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uInt16 mask = mySystem->pageMask();
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// Setup the page access methods for the current bank
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System::PageAccess access;
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access.device = this;
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access.directPokeBase = 0;
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// Map ROM image into the system
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for(uInt32 address = 0x1100; address < (0x1FE0U & ~mask);
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address += (1 << shift))
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{
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access.directPeekBase = &myImage[offset + (address & 0x0FFF)];
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mySystem->setPageAccess(address >> shift, access);
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}
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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int CartridgeEFSC::bank()
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{
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return myCurrentBank;
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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int CartridgeEFSC::bankCount()
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{
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return 16;
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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bool CartridgeEFSC::patch(uInt16 address, uInt8 value)
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{
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address = address & 0x0FFF;
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myImage[myCurrentBank * 4096 + address] = value;
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return true;
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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uInt8* CartridgeEFSC::getImage(int& size)
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{
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size = 65536;
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return &myImage[0];
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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bool CartridgeEFSC::save(Serializer& out) const
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{
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string cart = name();
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try
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{
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out.putString(cart);
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out.putInt(myCurrentBank);
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}
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catch(const char* msg)
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{
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cerr << msg << endl;
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return false;
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}
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catch(...)
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{
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cerr << "Unknown error in save state for " << cart << endl;
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return false;
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}
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return true;
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}
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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bool CartridgeEFSC::load(Deserializer& in)
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{
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string cart = name();
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try
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{
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if(in.getString() != cart)
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return false;
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myCurrentBank = (uInt16) in.getInt();
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}
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catch(const char* msg)
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{
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cerr << msg << endl;
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return false;
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}
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catch(...)
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{
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cerr << "Unknown error in load state for " << cart << endl;
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return false;
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}
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// Remember what bank we were in
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bank(myCurrentBank);
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return true;
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}
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@ -0,0 +1,153 @@
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//============================================================================
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//
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// SSSS tt lll lll
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// SS SS tt ll ll
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// SS tttttt eeee ll ll aaaa
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// SSSS tt ee ee ll ll aa
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// SS tt eeeeee ll ll aaaaa -- "An Atari 2600 VCS Emulator"
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// SS SS tt ee ll ll aa aa
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// SSSS ttt eeeee llll llll aaaaa
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//
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// Copyright (c) 1995-2009 by Bradford W. Mott and the Stella team
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//
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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: CartEFSC.hxx,v 1.1 2009-04-05 20:18:41 stephena Exp $
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//============================================================================
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#ifndef CARTRIDGEEFSC_HXX
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#define CARTRIDGEEFSC_HXX
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class System;
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#include "bspf.hxx"
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#include "Cart.hxx"
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/**
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Cartridge class used for Homestar Runner by Paul Slocum.
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There are 16 4K banks (total of 64K ROM) with 128 bytes of RAM.
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Accessing $1FE0 - $1FEF switches to each bank.
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This interpretation is based on analysis of the z26 assembly code,
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as this scheme doesn't seem to be documented anywhere.
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@author Stephen Anthony
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@version $Id: CartEFSC.hxx,v 1.1 2009-04-05 20:18:41 stephena Exp $
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*/
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class CartridgeEFSC : public Cartridge
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{
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public:
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/**
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Create a new cartridge using the specified image
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@param image Pointer to the ROM image
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*/
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CartridgeEFSC(const uInt8* image);
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/**
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Destructor
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*/
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virtual ~CartridgeEFSC();
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public:
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/**
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Reset device to its power-on state
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*/
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virtual void reset();
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/**
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Install cartridge in the specified system. Invoked by the system
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when the cartridge is attached to it.
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@param system The system the device should install itself in
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*/
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virtual void install(System& system);
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/**
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Install pages for the specified bank in the system.
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@param bank The bank that should be installed in the system
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*/
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virtual void bank(uInt16 bank);
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/**
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Get the current bank.
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@return The current bank, or -1 if bankswitching not supported
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*/
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virtual int bank();
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/**
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Query the number of banks supported by the cartridge.
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*/
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virtual int bankCount();
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/**
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Patch the cartridge ROM.
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@param address The ROM address to patch
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@param value The value to place into the address
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@return Success or failure of the patch operation
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*/
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virtual bool patch(uInt16 address, uInt8 value);
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/**
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Access the internal ROM image for this cartridge.
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@param size Set to the size of the internal ROM image data
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@return A pointer to the internal ROM image data
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*/
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virtual uInt8* getImage(int& size);
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/**
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Save the current state of this cart to the given Serializer.
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@param out The Serializer object to use
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@return False on any errors, else true
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*/
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virtual bool save(Serializer& out) const;
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/**
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Load the current state of this cart from the given Deserializer.
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@param in The Deserializer object to use
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@return False on any errors, else true
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*/
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virtual bool load(Deserializer& in);
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/**
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Get a descriptor for the device name (used in error checking).
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@return The name of the object
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*/
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virtual string name() const { return "CartridgeEFSC"; }
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public:
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/**
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Get the byte at the specified address.
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@return The byte at the specified address
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*/
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virtual uInt8 peek(uInt16 address);
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/**
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Change the byte at the specified address to the given value
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@param address The address where the value should be stored
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@param value The value to be stored at the address
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*/
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virtual void poke(uInt16 address, uInt8 value);
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private:
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// Indicates which bank is currently active
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uInt16 myCurrentBank;
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// The 64K ROM image of the cartridge
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uInt8 myImage[65536];
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// The 128 bytes of RAM
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uInt8 myRAM[128];
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};
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#endif
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@ -14,6 +14,8 @@ MODULE_OBJS := \
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src/emucore/CartDPC.o \
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src/emucore/CartE0.o \
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src/emucore/CartE7.o \
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src/emucore/CartEF.o \
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src/emucore/CartEFSC.o \
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src/emucore/CartF4.o \
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src/emucore/CartF4SC.o \
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src/emucore/CartF6.o \
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@ -21,7 +23,6 @@ MODULE_OBJS := \
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src/emucore/CartF8.o \
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src/emucore/CartF8SC.o \
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src/emucore/CartFASC.o \
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src/emucore/CartEF.o \
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src/emucore/CartFE.o \
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src/emucore/CartMB.o \
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src/emucore/CartMC.o \
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|
|
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@ -13,7 +13,7 @@
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// See the file "license" for information on usage and redistribution of
|
||||
// this file, and for a DISCLAIMER OF ALL WARRANTIES.
|
||||
//
|
||||
// $Id: GameInfoDialog.cxx,v 1.69 2009-04-05 18:59:56 stephena Exp $
|
||||
// $Id: GameInfoDialog.cxx,v 1.70 2009-04-05 20:18:41 stephena Exp $
|
||||
//
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||||
// Based on code from ScummVM - Scumm Interpreter
|
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// Copyright (C) 2002-2004 The ScummVM project
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||||
|
|
@ -131,7 +131,7 @@ GameInfoDialog::GameInfoDialog(
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ypos += lineHeight + 3;
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new StaticTextWidget(myTab, font, xpos, ypos+1, lwidth, fontHeight,
|
||||
"Type:", kTextAlignLeft);
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pwidth = font.getStringWidth("MC (C. Wilkson Megacart)");
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pwidth = font.getStringWidth("EFSC (64K H. Runner + ram)");
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items.clear();
|
||||
items.push_back("Auto-detect", "AUTO-DETECT");
|
||||
items.push_back("0840 (8K ECONObank)", "0840" );
|
||||
|
|
@ -145,7 +145,8 @@ GameInfoDialog::GameInfoDialog(
|
|||
items.push_back("DPC (Pitfall II)", "DPC" );
|
||||
items.push_back("E0 (8K Parker Bros)", "E0" );
|
||||
items.push_back("E7 (16K M-network)", "E7" );
|
||||
items.push_back("EF (64K Homestar Runner)", "EF" );
|
||||
items.push_back("EF (64K H. Runner)", "EF" );
|
||||
items.push_back("EFSC (64K H. Runner + ram)", "EFSC" );
|
||||
items.push_back("F4 (32K Atari)", "F4" );
|
||||
items.push_back("F4SC (32K Atari + ram)", "F4SC" );
|
||||
items.push_back("F6 (16K Atari)", "F6" );
|
||||
|
|
|
|||
|
|
@ -13,7 +13,7 @@
|
|||
// See the file "license" for information on usage and redistribution of
|
||||
// this file, and for a DISCLAIMER OF ALL WARRANTIES.
|
||||
//
|
||||
// $Id: GlobalPropsDialog.cxx,v 1.5 2009-04-05 18:59:56 stephena Exp $
|
||||
// $Id: GlobalPropsDialog.cxx,v 1.6 2009-04-05 20:18:41 stephena Exp $
|
||||
//
|
||||
// Based on code from ScummVM - Scumm Interpreter
|
||||
// Copyright (C) 2002-2004 The ScummVM project
|
||||
|
|
@ -43,7 +43,7 @@ GlobalPropsDialog::
|
|||
buttonHeight = font.getLineHeight() + 4;
|
||||
int xpos, ypos;
|
||||
int lwidth = font.getStringWidth("Right Difficulty: "),
|
||||
pwidth = font.getStringWidth("MC (C. Wilkson Megacart)");
|
||||
pwidth = font.getStringWidth("EFSC (64K H. Runner + ram)");
|
||||
WidgetArray wid;
|
||||
StringMap items;
|
||||
|
||||
|
|
@ -76,7 +76,8 @@ GlobalPropsDialog::
|
|||
items.push_back("DPC (Pitfall II)", "DPC" );
|
||||
items.push_back("E0 (8K Parker Bros)", "E0" );
|
||||
items.push_back("E7 (16K M-network)", "E7" );
|
||||
items.push_back("EF (64K Homestar Runner)", "EF" );
|
||||
items.push_back("EF (64K H. Runner)", "EF" );
|
||||
items.push_back("EFSC (64K H. Runner + ram)", "EFSC" );
|
||||
items.push_back("F4 (32K Atari)", "F4" );
|
||||
items.push_back("F4SC (32K Atari + ram)", "F4SC" );
|
||||
items.push_back("F6 (16K Atari)", "F6" );
|
||||
|
|
|
|||
Loading…
Reference in New Issue