Flexible frame buffer for raster output devices

U.S. Patent Number: 5299310

Abstract: A frame buffer for constructing a full page bit map for a raster device includes a plurality of memory cells arranged in lines and columns. The bits in the memory cells have a predetermined order, and the addresses associated with the memory cells have a linear consecutive sequence when the frame buffer is scanned out according to an originally planned direction. However, when the scan out direction is perpendicular to the originally planned direction, the predetermined bit order and the linear consecutive address sequence will not hold. The frame buffer in the invention includes mechanisms to adjust the bit order and scan out addresses when the scan out direction is perpendicular to the originally planned scan direction.

Inventors: Motoyama; Tetsuro (Santa Clara County, CA)

Assignee: Ricoh Company, Ltd. (San Jose, JP) Ricoh Corporation (San Jose, CA)

Application Number: 07/821,176

Issued: 1994-03-29

Expired: 2006-03-29

Classes: 345/545 ; 358/1.17

Field of search: 395/115,116,162,164-166 358/296 340/798-799

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