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Установить адрес.
RD/WR = 1.
A0 = 1.
E = 1. <= это dummy read
Пауза.
E = 0.
E = 1.
Пауза.
Прочитать данные.
E = 0.
Почитать даташит на KS108
To read the contents of display data RAM, twice access of read instruction is needed. In first access, data in display data RAM
is latched into output register. In second access, MPU can read data which is latched. That is, to read the data in display data
RAM, it needs dummy read. But status read is not needed dummy read.
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