Information processing device in an electronic apparatus utilizi

Details Information processing device in an electronic apparatus utilizi Information processing device in an electronic apparatus utilizi

1995-06-05

1996-07-16

Evans, Arthur G.

395166, G06K 1500

Patent

active

055375170

ABSTRACT:
Electronic apparatus, e.g., a printer, can transfer data or information to a releaseably connected accessory control device, e.g., a removable cartridge, installed in an input connector of the electronic apparatus wherein the accessory control device has no existing or designed input data line or data bus connect through which to receive data. The transferred data can then be processed by a microprocessor in the accessory control device. The data to be transferred to the accessory control device is accomplished as part of the address signal utilizing the lower 8 bits of the address signal provided as output on an address signal line (CAB). The data corresponding to the address specified by this address is read from a ROM (617) and thereafter held in latches (651, 652), and the holding of the read data is announced by a signal, EWRDY. When cartridge microprocessor reads the data held in latches (651, 652) via an internal data bus (DB29), the transfer of data from the electronic apparatus is complete. This arrangement makes it possible to transfer data to an accessory control device, which has no existing or designed data bus and is adapted as a read only device by the electronic apparatus, so that data can be readily processed by accessory control device microprocessor and either returned to the electronic processor, such as, for printing in the case of a printer, or held at the accessory control device for utilitarian purposes, e.g., display of data.

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E. Meyer, "Hochzeit Zu Drift--Atari ST mit ECB- und IBM-PC-Bussystem", C T, No. 7, pp. 138-145, Jul., 1987 (German Language).

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