| 摘要 |
PURPOSE:To attain high speed printing without increasing the storage capacity by controlling the system so that the image storage start and end address of continued pages is made continuous and expanding sequentially the image of the next page to the read end area. CONSTITUTION:A bit map memory (BMM) 25 has a memory capacity of 1 page +alpha. When the image of the 1st one page's share is expanded to the area of addresses A-B-1 of the BMM25, a control section 22 sets a start address A to an address register (AR) 42, sets a page end address B-1 to an end address register (EA) 43 and also starts a printer 3. The control section 22 reads a character code of the next page from a RAM23 without awaiting the read of data from the BMM25 and expands it to an idle area (+alpha area) represented by the addresses B-C-1. In this case, when the control section 22 expands the area to the area of the address C-1, the section receives an address data represented in an AR42, identifies the read position and after the idle area cleared exists with the finished read, the image is expanded to the area.
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