Display data transfer control apparatus applicable for display unit
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United States of America Patent
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Jul 18, 1989
Issued Date -
N/A
app pub date -
Nov 7, 1986
filing date -
May 7, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Disclosed is a display data transfer control apparatus in which a line control memory which can preset raster count data for modifying, in units of lines, an address of a main storage storing a character font to be displayed and character attribute data are provided, and a transfer line in the character font is determined for each line transfer in a DMA transfer sequence, so that, e.g., multi font control, character vertical elongation control, and ruled line vertical extension control, as well as processing character attributes such as an underline and overline, can be realized in the DMA transfer sequence.
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