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Add option to force sram in genesis core (#1991) 

gpgx upstream automatically gives 64KiB sram to every game of size 2MB or lower, unless specifically overrided.  That sucks and we don't do it.  But some games do need it; there's not enough information to autodetect otherwise.  So add a flag that we can set in gameDB for it, and set it true for two known games that have problems otherwise.
This commit is contained in:
nattthebear 2020-05-09 13:48:46 -04:00 committed by GitHub
parent 976ea4967b
commit a040e67c95
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
8 changed files with 43 additions and 22 deletions
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14
Assets/gamedb/gamedb_sega_md.txt
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@ -2653,12 +2653,12 @@ C5E4B901CA41524C182E576BEDB13981 Madden NFL 97 (UE) [!] GEN
31FDA133C077E6315232016CEDF3AABE Madden NFL 97 (UE) [b1] GEN
40D39CE3B288D3E3AC59ACE17CF053B7 Madden NFL 97 (UE) [b2] GEN
9277DB50DF385883749A74A87901B8C8 Madden NFL 97 (UE) [b3] GEN
7A960CF918F5D014BC5E5C330EA6642E Madden NFL 98 (U) [b1] GEN
E1A03EE2334ED425E71278D38A70E4E4 Madden NFL 98 (U) [b2] GEN
E3044F5DE786CFA13F2D689E427F62E3 Madden NFL 98 (U) [c][!] GEN
5B66890D9A48EE0EDF7FFAD7920BFCC8 Madden NFL 98 (U) [h1C] GEN
D9B1C5D34D112051E838F720A26CC8CF Madden NFL 98 (U) [h2C] GEN
22BBDE2293E404C5C91CD3CBE59CF4DD Madden NFL 98 (U) [h3C] GEN
7A960CF918F5D014BC5E5C330EA6642E Madden NFL 98 (U) [b1] GEN sram=1
E1A03EE2334ED425E71278D38A70E4E4 Madden NFL 98 (U) [b2] GEN sram=1
E3044F5DE786CFA13F2D689E427F62E3 Madden NFL 98 (U) [c][!] GEN sram=1
5B66890D9A48EE0EDF7FFAD7920BFCC8 Madden NFL 98 (U) [h1C] GEN sram=1
D9B1C5D34D112051E838F720A26CC8CF Madden NFL 98 (U) [h2C] GEN sram=1
22BBDE2293E404C5C91CD3CBE59CF4DD Madden NFL 98 (U) [h3C] GEN sram=1
571F2908C01D5B4FEAFAC5663A85A897 Madonna Songs for 50HZ (PD) GEN
41B8BA3569E3F4F98155DEA64318D223 Madou Monogatari I (J) [!] GEN
D82529E8ABD9D82C4907867ACE6C581B Madou Monogatari I (J) [b1] GEN
@ -3179,7 +3179,7 @@ ADD607E0DD5B9F294BB5A246D8946AED NHL 96 Elitserien (E) GEN
0D48E7FC7BE607CAA4B18615A718E5B7 NHL 97 (UE) [b1] GEN
31F2A66438932E5318A1BD46EC2CABB1 NHL 97 (UE) [b2] GEN
24D07598509CFBF10C450DD8FD274C41 NHL 97 (UE) [b3] GEN
A2C92C09D420CF7C2D2E55E8777F3A31 NHL 98 (U) [c][!] GEN
A2C92C09D420CF7C2D2E55E8777F3A31 NHL 98 (U) [c][!] GEN sram=1
32917C8A2D984FE32B342DBDAF78F50C NHL 98 (U) [h1C] GEN
C80ACA6AE52106638CAEE05FDE2FD9B7 NHL 98 (U) [h2C] GEN
03EB2646961C7B68E06A8CE5522538B9 NHL 98 (U) [h3C] GEN

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output/dll/gpgx.wbx.gz
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4
src/BizHawk.Client.Common/RomLoader.cs
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@ -557,7 +557,7 @@ namespace BizHawk.Client.Common
nextEmulator = null;
break;
case "GEN":
var genesis = new GPGX(nextComm, null, new[] { disc }, GetCoreSettings<GPGX>(), GetCoreSyncSettings<GPGX>());
var genesis = new GPGX(nextComm, game, null, new[] { disc }, GetCoreSettings<GPGX>(), GetCoreSyncSettings<GPGX>());
nextEmulator = genesis;
break;
case "SAT":
@ -824,7 +824,7 @@ namespace BizHawk.Client.Common
{
return false;
}
nextEmulator = new GPGX(nextComm, null, genDiscs, GetCoreSettings<GPGX>(), GetCoreSyncSettings<GPGX>());
nextEmulator = new GPGX(nextComm, game, null, genDiscs, GetCoreSettings<GPGX>(), GetCoreSyncSettings<GPGX>());
break;
case "Game Gear":
var leftBytesGG = xmlGame.Assets.First().Value;

13
src/BizHawk.Emulation.Cores/Consoles/Sega/gpgx64/GPGX.cs
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@ -23,12 +23,12 @@ namespace BizHawk.Emulation.Cores.Consoles.Sega.gpgx
IInputPollable, IDebuggable, IDriveLight, ICodeDataLogger, IDisassemblable
{
[CoreConstructor("GEN")]
public GPGX(CoreComm comm, byte[] file, object settings, object syncSettings)
: this(comm, file, null, settings, syncSettings)
public GPGX(CoreComm comm, GameInfo game, byte[] file, object settings, object syncSettings)
: this(comm, game, file, null, settings, syncSettings)
{
}
public GPGX(CoreComm comm, byte[] rom, IEnumerable<Disc> cds, object settings, object syncSettings)
public GPGX(CoreComm comm, GameInfo game, byte[] rom, IEnumerable<Disc> cds, object settings, object syncSettings)
{
ServiceProvider = new BasicServiceProvider(this);
// this can influence some things internally (autodetect romtype, etc)
@ -114,7 +114,12 @@ namespace BizHawk.Emulation.Cores.Consoles.Sega.gpgx
break;
}
if (!Core.gpgx_init(romextension, LoadCallback, _syncSettings.UseSixButton, system_a, system_b, _syncSettings.Region, _syncSettings.GetNativeSettings()))
var initResult = Core.gpgx_init(
romextension,
LoadCallback, _syncSettings.UseSixButton, system_a, system_b, _syncSettings.Region, game["sram"],
_syncSettings.GetNativeSettings());
if (!initResult)
throw new Exception($"{nameof(Core.gpgx_init)}() failed");
{

6
src/BizHawk.Emulation.Cores/Consoles/Sega/gpgx64/LibGPGX.cs
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@ -50,7 +50,11 @@ namespace BizHawk.Emulation.Cores.Consoles.Sega.gpgx
}
[BizImport(CallingConvention.Cdecl, Compatibility = true)]
public abstract bool gpgx_init(string feromextension, load_archive_cb feload_archive_cb, bool sixbutton, INPUT_SYSTEM system_a, INPUT_SYSTEM system_b, Region region, [In]InitSettings settings);
public abstract bool gpgx_init(
string feromextension,
load_archive_cb feload_archive_cb,
bool sixbutton, INPUT_SYSTEM system_a, INPUT_SYSTEM system_b, Region region, bool forcesram,
[In]InitSettings settings);
[BizImport(CallingConvention.Cdecl)]
public abstract void gpgx_get_fps(ref int num, ref int den);

5
waterbox/gpgx/.vscode/settings.json vendored
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@ -2,5 +2,8 @@
{
"editor.tabSize": 4,
"editor.insertSpaces": false,
"editor.detectIndentation": false
"editor.detectIndentation": false,
"files.associations": {
"callbacks.h": "c"
}
}

11
waterbox/gpgx/cinterface/cinterface.c
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@ -40,6 +40,8 @@ uint8 cinterface_custom_backdrop = 0;
uint32 cinterface_custom_backdrop_color = 0xffff00ff; // pink
extern uint8 border;
int cinterface_force_sram = 0;
#ifdef _MSC_VER
#define GPGX_EX __declspec(dllexport)
#else
@ -502,9 +504,16 @@ struct InitSettings
uint32_t BackdropColor;
};
GPGX_EX int gpgx_init(const char *feromextension, ECL_ENTRY int (*feload_archive_cb)(const char *filename, unsigned char *buffer, int maxsize), int sixbutton, char system_a, char system_b, int region, struct InitSettings *settings)
GPGX_EX int gpgx_init(
const char *feromextension,
ECL_ENTRY int (*feload_archive_cb)(const char *filename, unsigned char *buffer, int maxsize),
int sixbutton, char system_a, char system_b, int region, int forcesram,
struct InitSettings *settings)
{
_debug_puts("Initializing GPGX native...");
cinterface_force_sram = forcesram;
memset(&bitmap, 0, sizeof(bitmap));
strncpy(romextension, feromextension, 3);

12
waterbox/gpgx/core/cart_hw/sram.c
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@ -43,6 +43,8 @@
T_SRAM sram;
extern int cinterface_force_sram;
/****************************************************************************
* A quick guide to external RAM on the Genesis
*
@ -201,17 +203,15 @@ void sram_init()
/* this prevents backup RAM from being mapped in place of mirrored ROM when using S&K LOCK-ON feature */
sram.on = 0;
}
// by default, enable backup RAM for ROM smaller than 2MB
/*
else if (cart.romsize <= 0x200000)
else if (cinterface_force_sram && cart.romsize <= 0x200000)
{
// 64KB static RAM mapped to $200000-$20ffff
// by default, gpgx enables saveram for all rom no bigger than 2MB
// we don't do that because it confuses ram searches and debugging, and adds extra baggage to savestates
// but some games do need it, so allow that to be hacked in here
sram.start = 0x200000;
sram.end = 0x20ffff;
sram.on = 1;
}
*/
}
}