Implemented the symbolfile command (as mentioned by the help

debugger/dbg.y

@@ -66,6 +66,7 @@ extern void VIRTUAL_Dump(void);  /* memory/virtual.c */
 %token <string> tIDENTIFIER tSTRING tDEBUGSTR
 %token <integer> tNUM tFORMAT
 %token <reg> tREG
+%token tSYMBOLFILE
 
 %token tCHAR tSHORT tINT tLONG tFLOAT tDOUBLE tUNSIGNED tSIGNED 
 %token tSTRUCT tUNION tENUM
@@ -156,6 +157,7 @@ command:
     | tCOND tNUM tEOL          { DEBUG_AddBPCondition($2, NULL); }
     | tCOND tNUM expr tEOL     { DEBUG_AddBPCondition($2, $3); }
     | tDEBUGMSG tDEBUGSTR tEOL { MAIN_ParseDebugOptions($2); }
+    | tSYMBOLFILE pathname tEOL{ DEBUG_ReadSymbolTable($2); }
     | list_command
     | disassemble_command
     | set_command

debugger/debug.l

@@ -142,6 +142,7 @@ $gs     { yylval.reg = REG_GS;  return tREG; }
 
 <INITIAL>mode				{ BEGIN(NOCMD); return tMODE; }
 <INITIAL>show|sho|sh			{ BEGIN(SHOW_CMD); return tSHOW; }
+<INITIAL>symbolfile|symbols|symbol|sf   { BEGIN(PATH_EXPECTED); return tSYMBOLFILE; }
 
 <INITIAL,INFO_CMD,DEL_CMD>break|brea|bre|br|b	{ BEGIN(PATH_EXPECTED); return tBREAK; }