| 摘要 |
PURPOSE:To attain plotting over graphics memories having discontinuous address spaces without providing a virtual memory with mass storage by referring to a memory control table and deciding a plotting position. CONSTITUTION:A memory control table 2 stores the starting address and completing address of a usable memory block for a program. A plotting control circuit 4 plots a graphic on a memory 1. When the position to plot is supplied by a plotting control circuit 4, an address generating circuit 3 refers to the memory control table 2, generates the address to draw, and output it to the plotting control device 4. |
