Frequently Asked Questions (FAQ's)

1. What kind of microcontrollers are supported by Simulator2003 ?

Simulator2003 supports 8031/8032/87C51/87C52/89C51/89C52/8051/8052 and all MCS51 based microcontrollers.

2. How to install Simulator 2003 ?

3. I am unable to receive my registration info after purchase of Simulator2003 ?

Make sure email address you supplied does not filter incoming emails because your mail server might filter emails send by FST Soft carrying your registration info by thinking them as spam. FST Soft will not be responsible if you are unable to receive your User Name and Password because of any email filtration on your specified email address. In addition kindly avoid free email accounts while supplying your email address. User Name and Password is send as soon as payment verification is completed which normally takes maximum of two days. If you are unable to receive your User Name and password within 2 days of purchase, contact our sales team at

4. When I try to install Simulator2003, Installation program for a program other than  Simulator2003 is run or setup is unsuccessful.

This is because of a bug in previous installation. Please download latest version of Simulator2003 by clicking here. If problem still persists, please contact our technical staff by sending email to


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