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Jean-Damien LEBUI wrote:I have never done this but I can tell you my understanding of the process. I may not have all the details and could even be wrong here so YMMV.
I've never working with the underline platform of javacard and now, I have a question related to the Javacard OS.
If you have ever done this kind of work, would you please share with me the basic step in the process?
1- Development of javacard OS (conform to Javacard specification) in C/C++?C and Assembly. You may also be able to use C++
2- The compilation of the javacard OS code must be based on target IC? That means, we can use the compiler to compile the code into the 'machine languages' targeted to a specific IC (i.e. ST or Samsung)?That is correct. The IC manufacturer will be able to provide a toolchain for this.
3- After the compilation, it's the phase of loading the compiled code into the memory of the 'blank card'. Normally, the 'blank card' must support ISO-7816 specification, is that right? So which commands we would use to load the javacard OS into the memory of the 'blank card'? I have no idea about the memory location when loading the OS into the card, I hope that someone here would clarify me on this point.This may depend on the IC you use and the developer documentation (or customer support) would be able to help here.
4- If the card is compatible with GP, another phase of compiled GP code loading must be added?If the card is GP compliant it will most likely have a JCRE as well. If you are building a JCVM/JCRE you will need to add the GP support as well.