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Code cleanup. Save location can now be edited in GUI. *nix can now correctly save in a location other than ~/.zsnes

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This commit is contained in:
n-a-c-h
2005-01-10 02:21:51 +00:00
parent bcff1629aa
commit 1b62e9286f
16 changed files with 154 additions and 169 deletions
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60
zsnes/src/cfgload.c
View File

@@ -28,6 +28,7 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#include "gblhdr.h"
#else
#include <string.h>
#include <unistd.h>
#endif
#define StringA "FRAMESKIP"
@@ -48,8 +49,6 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#define StringI "VIDEOMODEDOS"
#endif
#define StringJ "EXECUTE"
/* StringK is unused */
#define StringK "SOUNDBUFDISABLE"
#define StringM "STEREO"
#define StringN "GUIDISABLE"
#define StringO "SCANLINES"
@@ -120,7 +119,6 @@ extern unsigned char cvidmode;
extern unsigned char antienab;
extern unsigned char StereoSound;
extern unsigned int SoundQuality;
extern char SRAMDir[512];
extern unsigned char MusicRelVol;
extern unsigned char Force8b;
extern unsigned char scanlines;
@@ -143,13 +141,11 @@ extern unsigned int ZOpenFile(); //Create_File. Open_File
extern unsigned int ZFileWrite(); //Write_File();
extern unsigned int ZCloseFile(); //Close_File
#ifdef __LINUX__
/* if TextFile==0, zlib functions aren't used
useful to save the config file*/
extern char *InitDir; /* 512 unsigned chars */
extern char *InitDrive; /* 2 unsigned chars */
extern char zcfgdir[1024];
#endif
char SRAMDir[1024];
char LoadDriveB[2];
char LoadDirB[128];
@@ -375,7 +371,7 @@ void DOScreatenewcfg()
}
#ifdef __LINUX__
chdir(SRAMDir);
chdir(zcfgdir);
#endif
ZOpenFileName = CMDLineStr;
@@ -571,18 +567,7 @@ void DOScreatenewcfg()
WRITE_LINE("; Savefile directory. Leave it blank if you want the save files to be in the\r\n");
WRITE_LINE("; same directory as the games. It should be in a format like : C:\\dir\\dir\r\n\r\n");
if (cfgloadsdir == 1)
{
#ifdef __LINUX__
sprintf(buffer, "SaveDirectory = %s\r\n\r\n", SRAMDir);
#else
sprintf(buffer, "SaveDirectory = %c:\\%s\r\n\r\n", (char) (*SRAMDrive + 65), SRAMDir);
#endif
}
else
{
sprintf(buffer, "SaveDirectory = \r\n\r\n");
}
sprintf(buffer, "SaveDirectory = %s\r\n\r\n", SRAMDir);
SAVE_LINE(buffer);
WRITE_LINE("; Game directory. This is the directory where the GUI starts at.\r\n");
@@ -1250,22 +1235,11 @@ void getcfg()
{
if (!strcmp(_stringa, StringS))
{
if (_strlenb >= 3)
if (_strlenb >= 1)
{
#ifndef __LINUX__
if (_stringb[1] == ':' && _stringb[2] == '\\')
{
cfgloadsdir = 1;
SRAMDrive[0] = _stringb[0] - 65;
strncpy(SRAMDir, _stringb + 3, _strlenb - 3);
SRAMDir[_strlenb - 3] = '\0';
}
#else
cfgloadsdir = 1;
strncpy(SRAMDir, _stringb, _strlenb);
SRAMDir[_strlenb]='\0';
#endif
}
}
}
@@ -1515,3 +1489,23 @@ void getcfg()
DOScreatenewcfg();
}
}
unsigned char SRAMChdirFail = 0;
void SRAMChdir()
{
if (!chdir(SRAMDir))
{
SRAMChdirFail = 0;
}
else
{
SRAMChdirFail = 1;
}
}
void SRAMDirCurDir()
{
getcwd(SRAMDir,1024);
}

14
zsnes/src/cpu/execute.asm
View File

@@ -54,7 +54,7 @@ EXTSYM nextmenupopup
EXTSYM MovieProcessing
EXTSYM MovieFileHand, PrintStr
EXTSYM OSExit,DosExit,InitDir,InitDrive,createnewcfg,fnames,gotoroot,previdmode
EXTSYM ramsize,sfxramdata,setaramdata,SETAEnable,sram,SRAMDrive,SRAMDir,welcome
EXTSYM ramsize,sfxramdata,setaramdata,SETAEnable,sram,SRAMChdir,welcome
; EXTSYM tempstore
EXTSYM printhex
%ifdef __MSDOS__
@@ -1429,9 +1429,9 @@ NEWSYM statesaver
; jmp .skipsaves
; Save State
%ifdef __LINUX__
mov dl,[SRAMDrive]
mov ebx,SRAMDir
call Change_Dir
pushad
call SRAMChdir
popad
%endif
mov edx,fnamest+1
call Create_File
@@ -1831,9 +1831,9 @@ NEWSYM loadstate
mov byte[multchange],1
clim
%ifdef __LINUX__
mov dl,[SRAMDrive]
mov ebx,SRAMDir
call Change_Dir
pushad
call SRAMChdir
popad
%endif
; Get the state number
mov ebx,[statefileloc]

4
zsnes/src/dos/dosintrf.asm
View File

@@ -463,10 +463,6 @@ NEWSYM Get_Key
int 21h
ret
; mov dl,[SRAMDrive]
; mov ebx,SRAMDir
; call Change_Dir
NEWSYM Change_Drive
; change to drive in dl (0 = A, 1 = B, etc.)
mov ah,0Eh

59
zsnes/src/gui/gui.asm
View File

@@ -73,7 +73,7 @@ EXTSYM curblank, vidpastecopyscr, frameskip, newengen, vsyncon
EXTSYM cvidmode, antienab, smallscreenon, smallscreence,NetQuit
EXTSYM soundon, StereoSound, SoundQuality, MusicRelVol
EXTSYM endprog, continueprog, spcBuffera, spcRamcmp, cbitmode, makepal
EXTSYM t1cc, LoadDir, SRAMDir, LoadDrive,SRAMDrive, initsnes, romloadskip
EXTSYM t1cc, LoadDir, LoadDrive, SRAMDir, SRAMChdir, SRAMDirCurDir, initsnes, romloadskip
EXTSYM fname, makeextension, sram, loadfileGUI, GUIloadfailed
EXTSYM SetupROM,CheckROMType, romdata, ForcePal, ramsize, ramsizeand, curromsize
EXTSYM romispal, totlines, cfgloadsdir, init65816, procexecloop
@@ -630,7 +630,6 @@ NEWSYM hqFilter, db 0
NEWSYM reserved, db 0
NEWSYM scale2xFilter, db 0
NEWSYM st010difficulty, db 0 ; place holder till we commit the other Seta 10 file
NEWSYM SRAMPath, times 1024 db 0
NEWSYM SnapPath, times 1024 db 0
NEWSYM SPCPath, times 1024 db 0
NEWSYM BSXPath, times 1024 db 0
@@ -1473,9 +1472,9 @@ SECTION .text
NEWSYM SaveSramData
; change to sram dir
mov dl,[SRAMDrive]
mov ebx,SRAMDir
call Change_Dir
pushad
call SRAMChdir
popad
cmp byte[sramsavedis],1
je .savesramdone
@@ -1834,9 +1833,9 @@ NEWSYM StartGUI
call SaveSramData
; change to sram dir
mov dl,[SRAMDrive]
mov ebx,SRAMDir
call Change_Dir
pushad
call SRAMChdir
popad
call GUIQuickLoadUpdate
call LoadDetermine
@@ -2060,9 +2059,9 @@ NEWSYM StartGUI
cmp byte[CheatWinMode],0
je near .csskip
; change to sram dir
mov dl,[SRAMDrive]
mov ebx,SRAMDir
call Change_Dir
pushad
call SRAMChdir
popad
; Load Cheat Search File
mov edx,cstempfname
@@ -2488,9 +2487,9 @@ NEWSYM StartGUI
call GUISaveVars
; change dir to SRAMDrive/SRAMDir
mov dl,[SRAMDrive]
mov ebx,SRAMDir
call Change_Dir
pushad
call SRAMChdir
popad
mov byte[MousePRClick],1
mov byte[prevbright],0
@@ -2587,9 +2586,9 @@ SRAMDirc:
mov edx,LoadDrive
call Get_Dir
; change to sram dir
mov dl,[SRAMDrive]
mov ebx,SRAMDir
call Change_Dir
pushad
call SRAMChdir
popad
ret
LOADDir:
@@ -3123,7 +3122,9 @@ MoviePlay:
mov dword[fnamest+ebx-3],'.zmv'
mov al,[CMovieExt]
mov byte[fnamest+ebx],al
call ChangetoSRAMdir
pushad
call SRAMChdir
popad
mov dword[Totalbyteloaded],0
call loadstate2
mov edx,fnamest+1
@@ -3644,14 +3645,6 @@ DisplayBoxes:
.nomore
ret
ChangetoSRAMdir:
mov dl,[SRAMDrive]
mov ebx,SRAMDir
call Change_Dir
ret
ChangetoLOADdir:
mov dl,[LoadDrive]
mov ebx,LoadDir
@@ -3671,8 +3664,9 @@ GUIProcStates:
ret
.yesstate
mov byte[GUICBHold],0
; change dir to SRAMDrive/SRAMDir
call ChangetoSRAMdir
pushad
call SRAMChdir
popad
cmp byte[GUIStatesText5],1
je .loadstate
call statesaver
@@ -3690,8 +3684,9 @@ GUIProcStates:
ret
SaveSecondState:
; change dir to SRAMDrive/SRAMDir
call ChangetoSRAMdir
pushad
call SRAMChdir
popad
mov ebx,[statefileloc]
mov al,[fnamest+ebx]
mov byte[fnamest+ebx],'s'
@@ -3704,7 +3699,9 @@ SaveSecondState:
ret
LoadSecondState:
call ChangetoSRAMdir
pushad
call SRAMChdir
popad
mov ebx,[statefileloc]
mov al,[fnamest+ebx]
mov byte[fnamest+ebx],'s'

2
zsnes/src/gui/guikeys.inc
View File

@@ -1651,7 +1651,7 @@ GUIPathKeys:
cmp dword[GUIInputBox],1
jne .notBox1
mov eax,SRAMPath
mov eax,SRAMDir
jmp .boxselected
.notBox1
cmp dword[GUIInputBox],2

6
zsnes/src/gui/guiload.inc
View File

@@ -248,9 +248,9 @@ GUIloadfilename:
%ifndef __LINUX__
cmp byte[cfgloadsdir],0
jne .nosdrive
mov ebx,SRAMDir
mov edx,SRAMDrive
call Get_Dir
pushad
call SRAMDirCurDir
popad
%endif
.nosdrive

4
zsnes/src/gui/guimisc.inc
View File

@@ -58,7 +58,9 @@ MovieRecord:
mov dword[CFWriteStart],64
.nocheckit
mov byte[MovieRecordWinVal],0
call ChangetoSRAMdir
pushad
call SRAMChdir
popad
mov byte[NoPictureSave],1
cmp byte[MovieProcessing],0
jne .nostatesaver

2
zsnes/src/gui/guimouse.inc
View File

@@ -3241,7 +3241,7 @@ DisplayGUIChipClick
ret
DisplayGUIPathsClick
GUITextBoxInputNach 75,15,230,25,1,1024 ;SRAMPath
GUITextBoxInputNach 75,15,230,25,1,1024 ;SRAMDir
GUITextBoxInputNach 75,35,230,45,2,1024 ;SnapPath
GUITextBoxInputNach 75,55,230,65,3,1024 ;SPCPath
GUITextBoxInputNach 8,95,100,105,4,1024 ;BSXPath

12
zsnes/src/gui/guinetpl.inc
View File

@@ -1661,7 +1661,9 @@ NetLoadStuff:
mov al,[NetStateSize+2]
call RemoteSendChar
call SendPacket
call ChangetoSRAMdir
pushad
call SRAMChdir
popad
mov edx,fnamest+1
call Open_File
mov [NetLoadHandle],ax
@@ -1690,7 +1692,9 @@ loadstaterecvinit:
cmp dh,0
je .noreceive2
mov [NetStateSize+2],dl
call ChangetoSRAMdir
pushad
call SRAMChdir
popad
mov edx,Netfname
call Create_File
mov edx,[NetStateSize]
@@ -1827,7 +1831,9 @@ loadstaterecv:
pushad
mov bx,[NetLoadHandle]
call Close_File
call ChangetoSRAMdir
pushad
call SRAMChdir
popad
mov edx,Netfname
mov byte[RestoreValues],0
call loadstate3

12
zsnes/src/gui/guiwindp.inc
View File

@@ -6322,7 +6322,7 @@ BlinkCursorCheck:
.checkboxes
cmp dword[GUIInputBox],1
jne .notBox1
mov ebx,SRAMPath
mov ebx,SRAMDir
ret
.notBox1
cmp dword[GUIInputBox],2
@@ -6380,7 +6380,7 @@ BlinkCursorCheck:
DisplayGUIPaths:
GUIDrawWindowBox 19,GUIPathsDisp
sub byte[GUItextcolor],15
;GUIOuttextwin2 19,8,18,GUIPathsText1
GUIOuttextwin2 19,8,18,GUIPathsText1
GUIOuttextwin2 19,8,38,GUIPathsText2
GUIOuttextwin2 19,8,58,GUIPathsText3
GUIOuttextwin2 19,60,78,GUIPathsText4
@@ -6395,7 +6395,7 @@ DisplayGUIPaths:
GUIOuttextwin2 19,135,173,GUIPathsTextD
add byte[GUItextcolor],15
;GUIOuttextwin2 19,7,17,GUIPathsText1
GUIOuttextwin2 19,7,17,GUIPathsText1
GUIOuttextwin2 19,7,37,GUIPathsText2
GUIOuttextwin2 19,7,57,GUIPathsText3
GUIOuttextwin2 19,59,77,GUIPathsText4
@@ -6410,7 +6410,7 @@ DisplayGUIPaths:
GUIOuttextwin2 19,134,172,GUIPathsTextD
;Input boxes - alternate color
;DrawGUIWinBox 19,74,14,232,26,177
DrawGUIWinBox 19,74,14,232,26,177
DrawGUIWinBox 19,74,34,232,46,177
DrawGUIWinBox 19,74,54,232,66,177
DrawGUIWinBox 19,7,94,107,106,177
@@ -6423,7 +6423,7 @@ DisplayGUIPaths:
DrawGUIWinBox 19,134,179,236,191,177
;Input boxes
;DrawGUIWinBox 19,75,15,231,25,167
DrawGUIWinBox 19,75,15,231,25,167
DrawGUIWinBox 19,75,35,231,45,167
DrawGUIWinBox 19,75,55,231,65,167
DrawGUIWinBox 19,8,95,106,105,167
@@ -6435,7 +6435,7 @@ DisplayGUIPaths:
DrawGUIWinBox 19,135,155,235,165,167
DrawGUIWinBox 19,135,180,235,190,167
;GUIOuttextwin2d 19,77,19,SRAMPath,25
GUIOuttextwin2d 19,77,19,SRAMDir,25
GUIOuttextwin2d 19,77,39,SnapPath,25
GUIOuttextwin2d 19,77,59,SPCPath,25
GUIOuttextwin2d 19,10,99,BSXPath,15

6
zsnes/src/gui/menu.asm
View File

@@ -38,7 +38,7 @@ EXTSYM Clear2xSaIBuffer
EXTSYM romdata,romtype,ScreenShotFormat
EXTSYM Voice0Disable,Voice1Disable,Voice2Disable,Voice3Disable
EXTSYM Voice4Disable,Voice5Disable,Voice6Disable,Voice7Disable
EXTSYM SRAMDrive, SRAMDir, SPCPath, SnapPath, Change_Dir, CHPath, ZFileCHDir
EXTSYM SRAMChdir, SPCPath, SnapPath, Change_Dir, CHPath, ZFileCHDir
%ifndef NO_PNG
EXTSYM Grab_PNG_Data
%endif
@@ -56,9 +56,7 @@ EXTSYM Grab_PNG_Data
%macro ChangeDirSRAM 0
pushad
mov dl,[SRAMDrive]
mov ebx,SRAMDir
call Change_Dir
call SRAMChdir
popad
%endmacro

16
zsnes/src/init.asm
View File

@@ -29,7 +29,7 @@ EXTSYM MovieFileHand,filefound,inittable,SA1inittable
EXTSYM MessageOn,Msgptr,MsgCount,sndrot,GenerateBank0Table,SnowTimer
EXTSYM inittableb,inittablec,newgfx16b,cfgreinittime,EndMessage
EXTSYM Open_File,Read_File,Write_File,Close_File,Output_Text,Get_Key,CNetType
EXTSYM Delete_File,Get_First_Entry,Get_Next_Entry,Change_Dir,Get_Dir,InitDSP
EXTSYM Delete_File,Get_First_Entry,Get_Next_Entry,Change_Dir,InitDSP
EXTSYM Remove_Dir,Change_Single_Dir,Create_Dir,Get_Memfree,Create_File
EXTSYM SPCDisable,osm2dis,CurRecv,BackupSystemVars
EXTSYM SnowData,SnowVelDist
@@ -93,7 +93,7 @@ EXTSYM GUIcurrentdir,PrintStr
;EXTSYM GUIcurrentdir, PrintStr
EXTSYM DTALoc
EXTSYM spc7110romptr,allocspc7110
EXTSYM SRAMDir,SRAMDrive,cfgloadsdir,fnamest,statefileloc
EXTSYM SRAMChdir,cfgloadsdir,fnamest,statefileloc
EXTSYM ForcePal,ForceROMTiming,ForceHiLoROM,InitDir,InitDrive,enterpress,frameskip
EXTSYM maxromspace,curromspace,infoloc, patchfile
EXTSYM gotoroot,headdata,printnum,romispal
@@ -2722,9 +2722,9 @@ NEWSYM loadfileGUI
mov byte[SramExists],0
; change to sram dir
mov dl,[SRAMDrive]
mov ebx,SRAMDir
call Change_Dir
pushad
call SRAMChdir
popad
; open .srm file
mov edx,fnames+1
@@ -2880,9 +2880,9 @@ NEWSYM convertsram
jne .next2b
.nocutoffb
; change to sram directory
mov dl,[SRAMDrive]
mov ebx,SRAMDir
call Change_Dir
pushad
call SRAMChdir
popad
ret
SECTION .data

23
zsnes/src/linux/sdlintrf.asm
View File

@@ -24,14 +24,14 @@
EXTSYM DosExit,ZFileSystemInit
EXTSYM getcmdline,GUIRestoreVars,getcfg,obtaindir,ConvertJoyMap,tparms
EXTSYM preparedir,SBHDMA
EXTSYM SBHDMA
EXTSYM ccmdline
EXTSYM FilenameStart
EXTSYM spcon
EXTSYM cfgsoundon
EXTSYM cfgcvidmode
EXTSYM pl1contrl,pl2contrl
EXTSYM InitDir,InitDrive, SRAMDir, SRAMDrive
EXTSYM InitDir,InitDrive,SRAMChdir
EXTSYM DOScreatenewcfg,ExecGUISaveVars
EXTSYM allocptr
EXTSYM putchar
@@ -182,9 +182,9 @@ NEWSYM SystemInit
mov edx,InitDrive
call Get_Dir
mov dl,[SRAMDrive]
mov ebx,SRAMDir
call Change_Dir
pushad
call SRAMChdir
popad
%else
mov ebx,InitDir
mov edx,InitDrive
@@ -205,17 +205,10 @@ NEWSYM SystemInit
call ConvertJoyMap ; Mini joystick init
call ccmdline
call tparms
%ifndef __LINUX__
call preparedir
%else
mov ebx,SRAMDir
call Change_Dir
%endif
; call getblaster ; get set blaster environment
; cmp byte[Force8b],1
; jne .noforce8b
pushad
call SRAMChdir
popad
mov byte[SBHDMA],1
;.noforce8b
pop es
ret

65
zsnes/src/linux/zfilew.c
View File

@@ -269,10 +269,6 @@ DWORD ZFileMKDir()
#endif
}
extern char SRAMDir;
extern char InitDir;
extern char LoadDir;
DWORD ZFileCHDir()
{
@@ -464,39 +460,46 @@ DWORD GetDate()
return(value);
}
extern char SRAMDir[1024];
extern char LoadDir[512];
#ifdef __LINUX__
char zcfgdir[1024];
#define ZCFG_DIR "/.zsnes"
#define ZCFG_DIR_LEN (1023-strlen(ZCFG_DIR))
void obtaindir()
{
char *cfgdir = NULL;
char *homedir = NULL;
DIR *tmp;
char *homedir = 0;
DIR *tmp;
if ((homedir = (char *)getenv("HOME"))==NULL) {
homedir = (char *)malloc(128);
getcwd(homedir, 128);
}
cfgdir = (char *)malloc(strlen(homedir)+strlen("/.zsnes")+1);
strcpy(cfgdir, homedir);
free(homedir);
strcat(cfgdir, "/.zsnes");
tmp = opendir(cfgdir);
if (tmp == NULL) {
MKPath = cfgdir;
ZFileMKDir();
} else {
closedir(tmp);
}
// strcpy(&InitDir, cfgdir);
// getcwd(&InitDir, 128);
if (SRAMDir == 0){
strcpy(&SRAMDir, cfgdir);
}
free(cfgdir);
if (LoadDir == 0) {
getcwd(&LoadDir, 128);
}
if ((homedir = (char *)getenv("HOME")) == 0)
{
homedir = (char *)malloc(ZCFG_DIR_LEN);
getcwd(homedir, ZCFG_DIR_LEN);
}
strcpy(zcfgdir, homedir);
free(homedir);
strcat(zcfgdir, ZCFG_DIR);
tmp = opendir(zcfgdir);
if (tmp == NULL)
{
MKPath = zcfgdir;
ZFileMKDir();
}
else
{
closedir(tmp);
}
if (*SRAMDir == 0)
{
strcpy(SRAMDir, zcfgdir);
}
if (*LoadDir == 0)
{
getcwd(LoadDir, 512);
}
}
extern char fnamest, fnames;

34
zsnes/src/ui.asm
View File

@@ -40,6 +40,8 @@ EXTSYM romloadskip
EXTSYM cfgloadgdir,cfgloadsdir
EXTSYM init18_2hz
EXTSYM OSExit,GUIOn2
EXTSYM SRAMDirCurDir,SRAMChdir,SRAMChdirFail
%ifdef __LINUX__
EXTSYM LinuxExit
EXTSYM GetFilename
@@ -921,9 +923,9 @@ NEWSYM makeextension
ret
.latestsave
; change dir to Save Dir
mov dl,[SRAMDrive]
mov ebx,SRAMDir
call Change_Dir
pushad
call SRAMChdir
popad
call DetermineNewest
@@ -1157,9 +1159,9 @@ SECTION .text
NEWSYM obtaindir
cmp byte[cfgloadsdir],1
je .nosdriveb
mov ebx,SRAMDir
mov edx,SRAMDrive
call Get_Dir
pushad
call SRAMDirCurDir
popad
.nosdriveb
cmp byte[cfgloadgdir],1
je .noldriveb
@@ -1185,21 +1187,21 @@ NEWSYM preparedir
je near .nosdrivec
; verify sram drive/directory exists
; change dir to SRAMDrive/SRAMDir
mov dl,[SRAMDrive]
mov ebx,SRAMDir
call Change_Dir
jc .sramerror
jmp .yessdrive
.sramerror
pushad
call SRAMChdir
popad
cmp byte[SRAMChdirFail],0
je .yessdrive
mov dl,[InitDrive]
mov ebx,InitDir
call Change_Dir
mov byte[cfgloadsdir],0
; Get drive/dir
mov ebx,SRAMDir
mov edx,SRAMDrive
call Get_Dir
pushad
call SRAMDirCurDir
popad
mov edx,.sramerrorm
call PrintStr
@@ -1227,7 +1229,6 @@ SECTION .data
.enter db 13,10,0
NEWSYM InitDrive, db 2
NEWSYM SRAMDrive, db 2
NEWSYM LoadDrive, db 2
%ifdef __LINUX__
@@ -1238,7 +1239,6 @@ NEWSYM gotoroot, db '\',0
SECTION .bss
NEWSYM InitDir, resb 512
NEWSYM SRAMDir, resb 512
NEWSYM LoadDir, resb 512
SECTION .text

4
zsnes/src/win/winintrf.asm
View File

@@ -688,10 +688,6 @@ KeyConvTableS
db 208,209,210,211,255,255,255,255 ; 50h
SECTION .text
; mov dl,[SRAMDrive]
; mov ebx,SRAMDir
; call Change_Dir
NEWSYM Change_Drive
; change to drive in dl (0 = A, 1 = B, etc.)
and edx,0FFh