Minimum pin memory device
Automatic print wheel element changing mechanism for a serial printer
Font module for matrix printer
Printer subsystem with dual cooperating microprocessors Patent #: 4452136
ApplicationNo. 06/770995 filed on 08/30/1985
US Classes:400/61, INCLUDING CONTROL OF FORMAT AND SELECTION OF TYPE-FACE BY PROGRAMMED CONTROL-SYSTEM (E.G., INPUT TYPEWRITER)358/1.11, Character or font365/63, INTERCONNECTION ARRANGEMENTS400/692, Having means facilitating interchange of parts400/70INCLUDING SELECTION OF TYPE-FACE BY PROGRAMMED-CONTROL-SYSTEM OR BY REMOTE CONTROL
ExaminersPrimary: Sewell, Paul T.
Attorney, Agent or Firm
International ClassesG06K 15/02 (20060101)
G06K 15/10 (20060101)
Foreign Application Priority Data1984-08-31 JP
AbstractA dot-matrix printer of the invention uses a font cartridge unit storing in advance character pattern data corresponding to characters other than standard characters. The font cartridge unit has a memory area divided into a plurality of page areas, and comprises memory groups consisting of ROMs and RAMs storing character pattern data in units of page areas. A CPU sets a predetermined page address in a page address register in the font cartridge unit when dot printing of characters other than standard characters is performed. The CPU reads out desired character pattern data from the page area of the memory group corresponding to the preset page address. The CPU recognizes that no ROM is mounted at a position corresponding to the page area when predetermined data cannot be read out from the ROM. The CPU writes the predetermined data in the predetermined page area, and thereafter, when the predetermined page area is accessed, if the predetermined data cannot be read out, the CPU determines that no RAM is mounted at a position corresponding to the page area.
Field of SearchINCLUDING CONTROL OF FORMAT AND SELECTION OF TYPE-FACE BY PROGRAMMED CONTROL-SYSTEM (E.G., INPUT TYPEWRITER)
Including means for responding to input program or incoming signals and providing output program or signals representing typing operations (e.g., output typewriter)
INCLUDING SELECTION OF TYPE-FACE BY PROGRAMMED-CONTROL-SYSTEM OR BY REMOTE CONTROL
Having means facilitating interchange of parts