Emulator payphone cards

At the heart of building emulators different cards based on the following principle. As the memory of the smart card consists of a block and a rewritable neperezapisyvaemogo, and the phone says only in the rewritable area, what prevents us to consider information from a new map and save it somewhere? Suppose that the algorithm of the phone depends on the content "neperezapisyvaemoy" memory area, and it is each individual instance of the card, but that this region remains unchanged! The only drawback of this method can be considered pretty much the complexity of implementation, but this is compensated by the fact that on the basis of this principle is implemented emulators almost all cards, including even the SIM-card mobile phones.

The implementation of an emulator on this principle can be achieved in two ways. The first is that going to the logic circuit, carrying out all the logic circuit "unit card". However, the scheme becomes quite cumbersome. The second method, which is described below, based on the use of microcontrollers. In general, suggest the use of microcontrollers PIC-series, but such a program controller - gimor the highest degree. And for some reason people forget about the estate in the presence of   controllers of other series, including ours, domestic. But I do not recommend to use the past because of their great and mighty size. The most acceptable in my view, is to use a controller motorolovskogo MS68NS705K1. First, it is fairly easy to find, secondly, it is cheap. So, everything is very simple. Putting the programmer in the circuit shown in Fig.

Programmer.

Read the information (firmware) from the new card using the program with the help of this program and can record information on a blank card if it is not disposable

Pprogramiruem controller by connecting it to the scheme to the LPT port on your computer using the program. Download 32 kb

Putting an emulator for the scheme.

Emulator.

The emulator is ready for use.