ULTERNATING DISPLAY METHOD AT RANDOM SECTION

摘要

The method inverses the applied state signal to display it at random area of the CRT. The data signal stored at a RAM (6) is applied to a microprocessor (1) through a multiplexer (3) and stored to buffers (4,5). The state signal stored in the buffer (5) detects the corresponding image signal at a character ROM (12) and provides it to a shift register (13). At this time, the inversed image signal passed through an inverter (I1) and compared output signals passed through an AND gate (A1) are applied to a multiplexer (11). An upper register (7) stores the start address of the inversed signal and a lower register (9) stores the last address of it. The address signals are compared at comparators (8,10).