NULL pageframe detection added for EMM386 memory manager failing to assign one

diff --git a/DEBUG.16W b/DEBUG.16W
index 871f4d0..ce787d0 100755 (executable)
--- a/DEBUG.16W
+++ b/DEBUG.16W
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-\e[0m\e[0mSeg:8128       Size:256        Owner:0x1c6c\r
+\e[0m\e[0mSeg:7e55       Size:256        Owner:0x1c68\r
 \e[45;35m++++\e[0m\e[42;32m\r
-\e[0m\e[0mSeg:8228       Size:256        Owner:0x1c6e\r
+\e[0m\e[0mSeg:7f55       Size:256        Owner:0x1c6a\r
 \e[45;35m++++\e[0m\e[42;32m\r
-\e[0m\e[0mSeg:8328       Size:256        Owner:0x1c70\r
+\e[0m\e[0mSeg:8055       Size:256        Owner:0x1c6c\r
 \e[45;35m++++\e[0m\e[42;32m\r
-\e[0m\e[0mSeg:8428       Size:256        Owner:0x1c72\r
+\e[0m\e[0mSeg:8155       Size:256        Owner:0x1c6e\r
 \e[45;35m+++++\e[0m\e[42;32m\r
-\e[0m\e[0mSeg:8528       Size:256        Owner:0x1c74\r
+\e[0m\e[0mSeg:8255       Size:256        Owner:0x1c70\r
 \e[45;35m++++\e[0m\e[42;32m\r
-\e[0m\e[0mSeg:8628       Size:256        Owner:0x1c76\r
+\e[0m\e[0mSeg:8355       Size:256        Owner:0x1c72\r
 \e[45;35m++++\e[0m\e[42;32m\r
-\e[0m\e[0mSeg:8728       Size:256        Owner:0x1c78\r
+\e[0m\e[0mSeg:8455       Size:256        Owner:0x1c74\r
 \e[45;35m++++\e[0m\e[42;32m\r
-\e[0m\e[0mSeg:8828       Size:256        Owner:0x1c7a\r
+\e[0m\e[0mSeg:8555       Size:256        Owner:0x1c76\r
 \e[45;35m++++\e[0m\e[42;32m\r
-\e[0m\e[0mSeg:8928       Size:256        Owner:0x1c7c\r
+\e[0m\e[0mSeg:8655       Size:256        Owner:0x1c78\r
 \e[45;35m+++++\e[0m\e[42;32m\r
-\e[0m\e[0mSeg:9d67       Size:25240      Owner:0x0\r
-\e[41;31m+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\e[0m
\ No newline at end of file
+\e[0m\e[0mSeg:8755       Size:256        Owner:0x1c7a\r
+\e[45;35m++++\e[0m\e[42;32m\r
+\e[0m\e[0mSeg:8855       Size:256        Owner:0x1c7c\r
+\e[45;35m++++\e[0m\e[42;32m\r
+\e[0m\e[0mSeg:8955       Size:273        Owner:0x1b88\r
+\e[44;34m++++\e[0m\e[42;32m\r
+\e[0m\e[0mSeg:9d94       Size:25195      Owner:0x0\r
+\e[41;31m++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++\e[0m
\ No newline at end of file

diff --git a/HEAP.16W b/HEAP.16W
index fb3acb4..6f9a21a 100755 (executable)
--- a/HEAP.16W
+++ b/HEAP.16W
@@ -1,45 +1,47 @@
 \r
        == default ==\r
 \r
-  USED block at 25230016 of size 26\r
-  FREE block at 25230030 of size 34844\r
-  USED block at 2523884c of size 136\r
-  USED block at 252388d4 of size 20\r
-  FREE block at 252388e8 of size 7972\r
+  USED block at 24500016 of size 26\r
+  USED block at 24500030 of size 26\r
+  FREE block at 2450004a of size 38914\r
+  USED block at 2450984c of size 136\r
+  USED block at 245098d4 of size 20\r
+  FREE block at 245098e8 of size 7972\r
 OK - end of heap\r
 \r
        == near ==\r
 \r
-  USED block at 1522ecf6 of size 16\r
-  USED block at 1522ed06 of size 566\r
-  USED block at 1522ef3c of size 72\r
-  USED block at 1522ef84 of size 20\r
-  USED block at 1522ef98 of size 20\r
-  USED block at 1522efac of size 20\r
-  USED block at 1522efc0 of size 20\r
-  USED block at 1522efd4 of size 20\r
-  USED block at 1522efe8 of size 4116\r
+  USED block at 144fecf6 of size 12\r
+  USED block at 144fed02 of size 332\r
+  USED block at 144fee4e of size 52\r
+  USED block at 144fee82 of size 20\r
+  USED block at 144fee96 of size 20\r
+  USED block at 144feeaa of size 20\r
+  USED block at 144feebe of size 20\r
+  USED block at 144feed2 of size 20\r
+  USED block at 144feee6 of size 4374\r
 OK - end of heap\r
 \r
        == far ==\r
 \r
-  USED block at 25230016 of size 26\r
-  USED block at 25230030 of size 34844\r
-  USED block at 2523884c of size 136\r
-  USED block at 252388d4 of size 20\r
-  USED block at 252388e8 of size 7972\r
+  USED block at 24500016 of size 26\r
+  USED block at 24500030 of size 26\r
+  USED block at 2450004a of size 38914\r
+  USED block at 2450984c of size 136\r
+  USED block at 245098d4 of size 20\r
+  USED block at 245098e8 of size 7972\r
 OK - end of heap\r
 \r
 Memory Type         Total      Used       Free\r
 ----------------  --------   --------   --------\r
-Default                   42998        182       42816\r
-Near              4870         738       4132\r
-Far               42998        182       42816\r
+Default                   47094        208       46886\r
+Near              4870         496       4374\r
+Far               47094        208       46886\r
 ----------------  --------   --------   --------\r
-HC_coreleft = 4128\r
+HC_coreleft = 4372\r
 HC_farcoreleft = 458752\r
-HC_GetFreeSize = 42816\r
-HC_GetNearFreeSize = 4132\r
-HC_GetFarFreeSize = 42816\r
-memavl = 4128\r
-stackavail = 31605\r
+HC_GetFreeSize = 46886\r
+HC_GetNearFreeSize = 4374\r
+HC_GetFarFreeSize = 46886\r
+memavl = 4372\r
+stackavail = 31606\r

diff --git a/MEMINFO.16W b/MEMINFO.16W
new file mode 100755 (executable)
index 0000000..e69de29

diff --git a/MMDUMP.16W b/MMDUMP.16W
index a8c901b..5b3efb0 100755 (executable)
Binary files a/MMDUMP.16W and b/MMDUMP.16W differ

diff --git a/src/lib/16_dbg.h b/src/lib/16_dbg.h
index 61bbff8..3d7ef4a 100755 (executable)
--- a/src/lib/16_dbg.h
+++ b/src/lib/16_dbg.h
@@ -10,7 +10,7 @@
 #define __DEBUG_InputMgr__\r
 #define __DEBUG_MAP__\r
 //#define __DEBUG_CA__\r
-#define __DEBUG_PM__\r
+//#define __DEBUG_PM__\r
 //#define __DEBUG_MM__\r
 \r
 \r

diff --git a/src/lib/16_mm.c b/src/lib/16_mm.c
index 5f8bb38..67059b3 100755 (executable)
--- a/src/lib/16_mm.c
+++ b/src/lib/16_mm.c
@@ -88,7 +88,8 @@ static        char *ParmStringsexmm[] = {"noems","noxms",""};
 
 boolean MML_CheckForEMS(void)
 {
-       boolean emmcfems=0;
+       boolean emmcfems = false;
+       word            EMSPageFrame = 0;
        static char     emmname[] = "EMMXXXX0"; //fix by andrius4669
        __asm {
                mov     dx,OFFSET emmname       //fix by andrius4669
@@ -115,11 +116,21 @@ boolean MML_CheckForEMS(void)
                mov     ah,0x3e
                int     0x21            // close handle
                jc      error
+
+               //
+               // pageframe check
+               //
+               mov     ah,EMS_GETFRAME
+               int     EMS_INT                 // find the page frame address
+               or      ah,ah
+               jnz     error
+               mov     [EMSPageFrame],bx
+
                //
                // EMS is good
                //
-               mov     emmcfems,1
-               jmp End
+               mov     emmcfems,1
+               jmp     End
 #ifdef __BORLANDC__
        }
 #endif
@@ -130,7 +141,7 @@ boolean MML_CheckForEMS(void)
                //
                // EMS is bad
                //
-               mov     emmcfems,0
+               mov     emmcfems,0
 #ifdef __BORLANDC__
        }
 #endif
@@ -138,6 +149,17 @@ boolean MML_CheckForEMS(void)
 #ifdef __WATCOMC__
        }
 #endif
+
+       //
+       // Pageframe switch to determine if there is one!
+       //
+       if(!EMSPageFrame)
+       {
+               emmcfems = false;
+#if defined(__DEBUG_PM__) || defined(__DEBUG_MM__)
+               printf("MML_CheckForEMS: EMS error No Pageframe!\nAddress detected to be %04x\n", EMSPageFrame);
+#endif
+       }
        return(emmcfems);
 }
 

diff --git a/src/lib/16_pm.c b/src/lib/16_pm.c
index 03df023..f4e1508 100755 (executable)
--- a/src/lib/16_pm.c
+++ b/src/lib/16_pm.c
@@ -158,57 +158,45 @@ boolean
 PML_StartupEMS(global_game_variables_t *gvar)\r
 {\r
        int             i;\r
-       //long  size;\r
+#ifdef __PM__NOHOGEMS__\r
+       long    size;\r
+#endif\r
        byte    err=0, str[64];\r
 \r
        boolean errorflag=false;\r
        static char     emmname[] = "EMMXXXX0"; //fix by andrius4669\r
-       unsigned int EMSVer = 0;\r
-       unsigned        totalEMSpages,freeEMSpages,EMSPageFrame,EMSHandle=0,EMSAvail=0;\r
-#ifdef __DEBUG_PM__\r
-       word e=0;\r
-#endif\r
-       totalEMSpages = freeEMSpages = EMSPageFrame = 0;\r
+       unsigned        EMSVer;\r
+       unsigned        totalEMSpages,freeEMSpages,EMSPageFrame,EMSHandle,EMSAvail;\r
+       totalEMSpages = freeEMSpages = EMSPageFrame = EMSHandle = EMSAvail = EMSVer = 0;        // set all to 0~\r
        gvar->pm.emm.EMSPresent = false;                        // Assume that we'll fail\r
-       gvar->pm.emm.EMSAvail = 0;\r
-       gvar->mmi.EMSmem = 0;\r
+       gvar->pm.emm.EMSAvail = gvar->mmi.EMSmem = 0;\r
 \r
        __asm {\r
                mov     dx,OFFSET emmname       //fix by andrius4669\r
                mov     ax,0x3d00\r
                int     EMM_INT         // try to open EMMXXXX0 device\r
                jc      error1\r
-#ifdef __DEBUG_PM__\r
-               add     e,1\r
-#endif\r
+\r
                mov     bx,ax\r
                mov     ax,0x4400\r
 \r
                int     EMM_INT         // get device info\r
                jc      error1\r
-#ifdef __DEBUG_PM__\r
-               add     e,1\r
-#endif\r
+\r
                and     dx,0x80\r
                jz      error1\r
-#ifdef __DEBUG_PM__\r
-               add     e,1\r
-#endif\r
+\r
                mov     ax,0x4407\r
 \r
                int     EMM_INT         // get status\r
                jc      error1\r
                or      al,al\r
                jz      error1\r
-#ifdef __DEBUG_PM__\r
-               add     e,1\r
-#endif\r
+\r
                mov     ah,0x3e\r
                int     EMM_INT         // close handle\r
                jc      error1\r
-#ifdef __DEBUG_PM__\r
-               add     e,1\r
-#endif\r
+\r
                mov     ah,EMS_STATUS\r
                int     EMS_INT\r
                jc      error1                  // make sure EMS hardware is present\r
@@ -217,7 +205,7 @@ PML_StartupEMS(global_game_variables_t *gvar)
                int     EMS_INT                 // only work on EMS 3.2 or greater (silly, but...)\r
                or      ah,ah\r
                jnz     error1\r
-               mov     [EMSVer],ax             //      set EMSVer\r
+               mov     [EMSVer],ax             // set EMSVer\r
                cmp     al,0x32                 // only work on ems 3.2 or greater\r
                jb      error1\r
 \r
@@ -238,7 +226,7 @@ PML_StartupEMS(global_game_variables_t *gvar)
                mov     [totalEMSpages],dx\r
                mov     [freeEMSpages],bx\r
                mov     [EMSAvail],bx\r
-               jmp End1\r
+               jmp     End1\r
 #ifdef __BORLANDC__\r
        }\r
 #endif\r
@@ -246,12 +234,9 @@ PML_StartupEMS(global_game_variables_t *gvar)
 #ifdef __BORLANDC__\r
        __asm {\r
 #endif\r
-#ifdef __DEBUG_PM__\r
-               mov     e,1\r
-#endif\r
                mov     err,ah\r
                mov     errorflag,1\r
-               jmp End1\r
+               jmp     End1\r
 #ifdef __BORLANDC__\r
        }\r
 #endif\r
@@ -260,7 +245,7 @@ End1:
 #ifdef __WATCOMC__\r
        }\r
 #endif\r
-/*\r
+#ifdef __PM__NOHOGEMS__\r
        if(errorflag==false)\r
        {\r
                // Don't hog all available EMS\r
@@ -271,7 +256,7 @@ End1:
                        gvar->pm.emm.EMSAvail = size / EMSPageSize;\r
                }\r
        }\r
-*/\r
+#endif\r
        __asm {\r
                mov     ah,EMS_ALLOCPAGES\r
                mov     bx,[EMSAvail];\r
@@ -287,40 +272,28 @@ End1:
 #ifdef __BORLANDC__\r
        __asm {\r
 #endif\r
-#ifdef __DEBUG_PM__\r
-               mov     e,1\r
-#endif\r
                mov     err,ah\r
                mov     errorflag,1\r
-               jmp End2\r
+               jmp     End2\r
 #ifdef __BORLANDC__\r
-       }\r
+       }//end of assembly\r
 #endif\r
 End2:\r
 #ifdef __WATCOMC__\r
-       }\r
+       }//end of assembly\r
 #endif\r
-\r
-       if(errorflag==false)\r
-       {\r
-       gvar->mmi.EMSmem = EMSAvail * (dword)EMSPageSize;\r
-\r
-       // Initialize EMS mapping cache\r
-       for (i = 0;i < EMSFrameCount;i++)\r
-               gvar->pm.emm.EMSList[i].baseEMSPage = -1;\r
-\r
-       }\r
-       else\r
+       if(errorflag==true)\r
        {\r
                strcpy(str,"PML_StartupEMS: EMS error ");\r
                MM_EMSerr(str, err);\r
                printf("%s\n",str);\r
-#ifdef __DEBUG_PM__\r
-               printf("e=%u\n", e);\r
-               getch();\r
-#endif\r
                return(gvar->pm.emm.EMSPresent);\r
        }\r
+       gvar->mmi.EMSmem = EMSAvail * (dword)EMSPageSize;\r
+\r
+       // Initialize EMS mapping cache\r
+       for (i = 0;i < EMSFrameCount;i++)\r
+               gvar->pm.emm.EMSList[i].baseEMSPage = -1;\r
 \r
        gvar->pm.emm.EMSPresent = true;                 // We have EMS\r
        gvar->pm.emm.EMSPageFrame = EMSPageFrame;\r

diff --git a/src/lib/16_pm.h b/src/lib/16_pm.h
index 2ce5fc1..bdf29a5 100755 (executable)
--- a/src/lib/16_pm.h
+++ b/src/lib/16_pm.h
@@ -34,6 +34,7 @@
 #include "src/lib/16_ca.h"\r
 #include <dos.h>\r
 \r
+//#define __PM__NOHOGEMS__\r
 /*//   NOTE! PMPageSize must be an even divisor of EMSPageSize, and >= 1024\r
 #define        EMSPageSize             16384\r
 #define        EMSPageSizeSeg  (EMSPageSize >> 4)\r