G - Physics – 09 – G
Patent
G - Physics
09
G
375/12
G09G 1/00 (2006.01) G09G 5/22 (2006.01)
Patent
CA 1183976
ABSTRACT OF THE DISCLOSURE An information processing apparatus includes a RAM for storing character information and character pitch information corresponding thereto; a CRT for simultaneously displaying character information having different character pitches; line buffers supplied with the information from the RAM; a character pitch switching circuit for producing a character pitch or load clock signal in response to the character pitch information stored in the RAM; a memory address counter for reading out the contents of the line buffers at a rate determined by the character pitch clock signal; an address setting circuit for producing an address signal for a horizontal scroll operation in which the displayed characters are shifted in the horizontal direction on the screen; start address registers for determining how many characters to shift in response to the address signal and in accordance with the character pitch with which each is associated; and a selecting circuit for gating the output from only one of the start address registers, in response to the character pitch information in the RAM, to the memory address counter which controls which character is to be read first from the line buffers.
392196
Gowling Lafleur Henderson Llp
Sony Corporation
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