C51: 80C751.LIB is Missing From Evaluation Version

Information in this article applies to:

• C51 Version 6.00 and later

SYMPTOMS

I downloaded and installed the µVision Development Environment and the 8051 Evaluation Tools. I am creating some test code for the NXP 87C752 microcontroller and the documentation says I need to include the 80C751.LIB library file. I can't find this file anywhere on my hard drive or on the Keil web site. Is this LIB file still required? If so, where can I find it?

CAUSE

This library file is not included with the Evaluation Tools download. The reason is because the code generated by the evaluation software cannot be run on a NXP 750/751/752 device. The code from the evaluation compiler starts executing at 4000h which is located above the address space of these devices.

RESOLUTION

If you are using the evaluation compiler to get a better feel for how the tools work, you will have to run your program code on an 8051 that supports external CODE memory and that lets you load programs at address 4000h and higher.

SEE ALSO

• C51: Using the NXP 87C751

Last Reviewed: Thursday, February 25, 2021