The MECHANISM_STATUS CD-ROM command now correctly calculates length from the CDB instead of the CD buffer, fixes crash with NT 4.0 and the BT-542b controller;

Applied the remaining mainline PCem commits.

src/CPU/x86seg.c

@@ -2197,14 +2197,17 @@ void taskswitch286(uint16_t seg, uint16_t *segdat, int is32)
                 if (optype==OPTYPE_INT || optype==CALL)
                 {
                         writememl(base,0,tr.seg);
-                        new_flags|=NT_FLAG;
+                        if (cpu_state.abrt)
+                                return;
                 }
-                if (cpu_state.abrt) return;
 
                 new_cr3=readmeml(base,0x1C);
                 new_pc=readmeml(base,0x20);
                 new_flags=readmeml(base,0x24);
                 
+                if (optype == OPTYPE_INT || optype == CALL)
+                        new_flags |= NT_FLAG;                
+
                 new_eax=readmeml(base,0x28);
                 new_ecx=readmeml(base,0x2C);
                 new_edx=readmeml(base,0x30);
@@ -2383,13 +2386,16 @@ void taskswitch286(uint16_t seg, uint16_t *segdat, int is32)
                 if (optype==OPTYPE_INT || optype==CALL)
                 {
                         writememw(base,0,tr.seg);
-                        new_flags|=NT_FLAG;
+                        if (cpu_state.abrt)
+                                return;
                 }
-                if (cpu_state.abrt) return;
                 
                 new_pc=readmemw(base,0x0E);
                 new_flags=readmemw(base,0x10);
                 
+                if (optype == OPTYPE_INT || optype == CALL)
+                        new_flags |= NT_FLAG;
+
                 new_eax=readmemw(base,0x12);
                 new_ecx=readmemw(base,0x14);
                 new_edx=readmemw(base,0x16);

src/cdrom.c

@@ -2400,7 +2400,7 @@ void cdrom_command(uint8_t id, uint8_t *cdb)
 			break;
 
 		case GPCMD_MECHANISM_STATUS:
-			len = (cdbufferb[7] << 16) | (cdbufferb[8] << 8) | cdbufferb[9];
+			len = (cdb[7] << 16) | (cdb[8] << 8) | cdb[9];
 
  			memset(cdbufferb, 0, 8);
 			cdbufferb[5] = 1;

src/model.c

@@ -179,7 +179,7 @@ MODEL models[] =
         {"[386SX] Amstrad MegaPC",	ROM_MEGAPC,		"megapc",		{{"Intel", cpus_i386SX},      {"AMD", cpus_Am386SX}, {"Cyrix", cpus_486SLC}, {"",      NULL},     {"",      NULL}}, 1, MODEL_AT | MODEL_PS2 | MODEL_HAS_IDE,			  1,   16,   1, 127,     at_wd76c10_init, NULL			},
         {"[386SX] DTK 386SX clone",	ROM_DTK386,		"dtk386",		{{"Intel", cpus_i386SX},      {"AMD", cpus_Am386SX}, {"Cyrix", cpus_486SLC}, {"",      NULL},     {"",      NULL}}, 0, MODEL_AT | MODEL_HAS_IDE,				512,16384, 128, 127,        at_neat_init, NULL			},
         {"[386SX] IBM PS/1 model 2121",	ROM_IBMPS1_2121,	"ibmps1_2121",		{{"Intel", cpus_i386SX},      {"AMD", cpus_Am386SX}, {"Cyrix", cpus_486SLC}, {"",      NULL},     {"",      NULL}}, 1, MODEL_AT | MODEL_PS2 | MODEL_HAS_IDE,			  1,   16,   1, 127,      ps1_m2121_init, NULL			},
-        {"[386SX] IBM PS/1 m.2121+ISA", ROM_IBMPS1_2121_ISA,	"ibmps1_2121_isa",	{{"Intel", cpus_i386SX},      {"AMD", cpus_Am386SX}, {"Cyrix", cpus_486SLC}, {"",      NULL},     {"",      NULL}}, 1, MODEL_AT | MODEL_PS2 | MODEL_HAS_IDE,			  1,   16,   1, 127,      ps1_m2121_init, NULL			},
+        {"[386SX] IBM PS/1 m.2121+ISA", ROM_IBMPS1_2121_ISA,	"ibmps1_2121_isa",	{{"Intel", cpus_i386SX},      {"AMD", cpus_Am386SX}, {"Cyrix", cpus_486SLC}, {"",      NULL},     {"",      NULL}}, 0, MODEL_AT | MODEL_PS2 | MODEL_HAS_IDE,			  1,   16,   1, 127,      ps1_m2121_init, NULL			},
         {"[386SX] IBM PS/2 Model 55SX",	ROM_IBMPS2_M55SX,	"ibmps2_m55sx",		{{"Intel", cpus_i386SX},      {"AMD", cpus_Am386SX}, {"Cyrix", cpus_486SLC}, {"",      NULL},     {"",      NULL}}, 1, MODEL_AT | MODEL_PS2 | MODEL_PS2_HDD | MODEL_MCA,	  1,    8,   1,  63, ps2_model_55sx_init, NULL			},
 
         {"[386DX] AMI 386DX clone",	ROM_AMI386DX_OPTI495,	"ami386dx",		{{"Intel", cpus_i386DX},      {"AMD", cpus_Am386DX}, {"Cyrix", cpus_486DLC}, {"",      NULL},     {"",      NULL}}, 0, MODEL_AT | MODEL_HAS_IDE,				  1,   64,   1, 127,     at_opti495_init, NULL			},
@@ -192,7 +192,7 @@ MODEL models[] =
         {"[486] AMI 486 clone",		ROM_AMI486,		"ami486",		{{"Intel", cpus_i486},        {"AMD", cpus_Am486},   {"Cyrix", cpus_Cx486},  {"",      NULL},     {"",      NULL}}, 0, MODEL_AT | MODEL_HAS_IDE,				  1,   64,   1, 127,     at_ali1429_init, NULL			},
         {"[486] AMI WinBIOS 486",	ROM_WIN486,		"win486",		{{"Intel", cpus_i486},        {"AMD", cpus_Am486},   {"Cyrix", cpus_Cx486},  {"",      NULL},     {"",      NULL}}, 0, MODEL_AT | MODEL_HAS_IDE,				  1,   64,   1, 127,     at_ali1429_init, NULL			},
         {"[486] DTK PKM-0038S E-2",	ROM_DTK486,		"dtk486",		{{"Intel", cpus_i486},        {"AMD", cpus_Am486},   {"Cyrix", cpus_Cx486},  {"",      NULL},     {"",      NULL}}, 0, MODEL_AT | MODEL_HAS_IDE,				  1,   64,   1, 127,      at_dtk486_init, NULL			},
-        {"[486] IBM PS/1 model 2133",	ROM_IBMPS1_2133,	"ibmps1_2133",		{{"Intel", cpus_i486},        {"AMD", cpus_Am486},   {"Cyrix", cpus_Cx486},  {"",      NULL},     {"",      NULL}}, 1, MODEL_AT | MODEL_PS2 | MODEL_HAS_IDE,			  1,   64,   1, 127,      ps1_m2133_init, NULL			},
+        {"[486] IBM PS/1 model 2133",	ROM_IBMPS1_2133,	"ibmps1_2133",		{{"Intel", cpus_i486},        {"AMD", cpus_Am486},   {"Cyrix", cpus_Cx486},  {"",      NULL},     {"",      NULL}}, 0, MODEL_AT | MODEL_PS2 | MODEL_HAS_IDE,			  1,   64,   1, 127,      ps1_m2133_init, NULL			},
         {"[486] Rise Computer R418",	ROM_R418,		"r418",			{{"Intel", cpus_i486},        {"AMD", cpus_Am486},   {"Cyrix", cpus_Cx486},  {"",      NULL},     {"",      NULL}}, 0, MODEL_AT | MODEL_HAS_IDE | MODEL_PCI,			  1,   64,   1, 127,        at_r418_init, NULL			},
 
         {"[Socket 4 LX] Intel Premiere/PCI",ROM_REVENGE,	"revenge",		{{"Intel", cpus_Pentium5V},   {"",    NULL},         {"",      NULL},        {"",      NULL},     {"",      NULL}}, 0, MODEL_AT | MODEL_PS2 | MODEL_HAS_IDE | MODEL_PCI,	  1,  128,   1, 127,      at_batman_init, NULL			},