The problem of addressing.
Ease of programming with four targeted teams and has negative side. Length team gets big, the program takes up space in RAM, slows down its performance. There are several ways to overcome these difficulties, a problem called addressing. Consider some of them.
If the sequential access memory to place teams in the order in which they appear on the program, the transition from one team to the next will happen automatically, and the address A4 is not necessary.
For the RAM can be eliminated from each team address A4, if you enter into the CU special device - the program counter (SC). At the beginning of the counter contains the address of the first team of the program. Recognizing its CPC, N content increases the number of cells in the SC occupied by this command. If the teams are located in the RAM series, the new contents of the SC is now the location of the second team. It is easy to see that, in general, SC is a pointer to address the team following the current one. As a result, all commands can be three-address.
Note that if you want to disturb the natural sequence of commands, for example due to changed as a result of the alerting signal state N, or in the implementation of branching algorithm, it is necessary to force the contents of the IC. To this end, use the special commands the transfer of control (CP). Teams conditional transfer of control is useful for algorithms that contain branching, depending on whether, or not any conditions.
Teams unconditional transfer of control does not contain a condition code and always ensure that the transition to a team located at A. They are comfortable, if a sequential arrangement of commands in the program memory is "islands" that contain operands or side branches of the program.