Hi Ayman,

you can download an evaluation version from the well known Keil C51, limited to 4kB and without floating point library:

http://www.cypress.com/support/d...F47620AEE8


As cheap developing hardware I suggest the T89C51RD2 or P89C668 or similiar, since no programmer was needed, only a connection to the PC over the COM port.


Peter