20x4 LCD shows Black boxes

[PA3040]

I checked your MCU and I think it is 100% pin compatible with PIC16f877a MCU
If you have or if you can simply buy one I can send all files. That will help to you some extend

 

[ADGAN]

I'll be able to ask for a PIC16F88 from a friend.

 

[PA3040]

Please check attached file
I am using HI-TECH C Lite
MCU 16f877a
Fosc 4MHz
Config in the source code
Change setting as per your hardware

Which version you are using with Micro C, I mean PRO or Lite

 

[ADGAN]

Thanx. I'm using MikroC pro.