| 摘要 |
A printer driver of a host computer checks the size of RAM of a dumb printer. There are prepared print data comprising a bit image, which has resolution and levels of halftone matching the size of the RAM. Print data are divided into data on a per-page basis or a per-band basis. While managing the sequence of band data pertaining to individual pages of the print data, a print monitor sequentially sends the band data to the dumb printer. Every time one of the band data sets is transmitted, the print monitor receives, from the dumb printer, data pertaining to the current status of or an error in the dumb printer. The thus-received data are indicated on a display. In accordance with the printer status or an error in the printer, the print monitor controls the dumb printer so as to transmit subsequent band data, suspend transmission of subsequent band data, or re-transmit subsequent band data. The print monitor retains print data pertaining to an individual page until the completion of printing of the page is reported by the dumb printer. If there arises a necessity for print data pertaining to individual pages as a result of occurrence of an error, the print monitor re-transmits the data pertaining to the page. <IMAGE> |
