MULTI-PORT-SPEICHER UND QUELLENEINRICHTUNG FUER BILDPUNKTINFORMATION.

摘要

The chip includes a bit map memory and a control unit for enabling the intput and output of pixels and masking information to and from given addresses in the memory. A register for shifting stored pixel information is included. This register has data ports connected to data ports of the memory via a gating unit and a mask register is connected to the memory data ports via a second gating unit. The gating units are controlled by a second control unit.$The second control unit is capable of outputting a signal to the second gating unit to enable the transfer of masking information from the memory to the mask register and a second control signal to the first gating unit for enabling the transfer of pixel information from the memory to the shift register. The mask register is capable of transferring the masking information to the gating means for masking given bits of the pixel information. The memory pref. consists of a no. of units pack with a respective shift register.$