| 摘要 |
The control system of C.R.T. display consists of the memory(1030), the control circuit(102), the character generator(106) and the cathod-ray tube(109). The counter of line-number(121) represents the number of lines to practise a memory operation. The LREG(122) appoints the number of lines to fix the arbitrary number of line in the CRT(109). The comparator(123) compares the counter of line-number(121) with the LREG(122). The summing circuit(125) draws up a address to access the memory(103).
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