extern int		Port;
extern HANDLE	hCom;
extern BYTE	pkt[1024];
extern BOOL SerialOpen();
extern void SerialClose();
extern BOOL SendPKT(BYTE type, int n, char *d);
extern BYTE RecvPKT();
extern char *CommandPKT(char *cmd, DWORD *len);
extern char *DumpRange(DWORD a, DWORD b);
#ifdef _STEP2_
extern BYTE *DumpRangeBin(CStep2 *dlg,DWORD a, DWORD b);
#endif
extern BOOL CheckROM(LPBYTE pRom, UINT uType);