| abstract |
A scanner is connected to a G bus and a B bus by way of a scanner controller and a G bus/B bus interface (GBI). A printer is connected in a similar manner. Furthermore, the scanner controller is connected directly to a printer controller with a CP bus. The GBI is capable of performing DMA transfer and data can be transferred between the GBIs. Furthermore, data can be transferred by way of the G bus and a RAM or the B bus and the RAM. The GBI is connected to the scanner controller and the printer controller by way of FIFOs, respectively. Accordingly, an image input/output control system according to the present invention is capable of absorbing differences in data transfer speeds and can be connected to various kinds of scanners and printers. |