calculator using vhdl
Doing Complete calculator in VHDL wont turn out to be economical design.
What you can do is you need to write / use some 8 bit VHDL CPU to do the job.
Using this cpu you can interface keyboard and display to it. And use it for doing
calculations also. 8051 core in VHDL is available you can use it. For testing you
can use RS232 port for kbd and display interfaces. Usesing Keil C you can easily
implemeny sine cos log functions also.
-nand_gates