
Note for software.

The software includes three files, DLPORTIO.DLL,DLPORTIO.SYS and EpromM51.exe. 

All those three files should locate in the same directory. 

If the "access violation" exist, that means your computer has incompatiable multiple copy of DLPORTIO.DLL and DLPORTIO.SYS 
located at somewhere. 
 
Normally they are located in C:\winnt\system32 when you using win2k or C:\windows\system32 when you using win98/me.   

In this case you need copy the DLPORTIO.DLL and DLPORTIO.SYS to those directory to overwrite those multiple copy.
