| 摘要 |
PURPOSE:To generate a line drawing at a high speed as a whole by providing plural pieces of DDAs (digital differential analyzers), generating in parallel dot data of plural pieces of line drawing patterns, distributing them to each memory block, and executing write independently from others. CONSTITUTION:In each DDA 2, 2', a given segment data is developed to a dot pattern of the respective segments, and a position coordinate on a screen of all dots for constituting this dot pattern is calculated. Subsequently, this position coordinate is converted to a unit number and an address of the corresponding memory unit 9, and sent out as a dot data to a distributor 3. The distributor 3 distributes the received dot data to every memory block concerned 5 from the unit number, and sends it to a register 4 which has been provided on each memory block 5. This register 4 is a pushup storage, and the received dot data is written in an address of the designated memory unit. |
