Abstract: A system relating to improved coin currency containment, collection, and retrieval, when carrying or utilizing a purse or pocketbook. The system provides an exterior-mounted coin slot that directs loose coin from such coin slot into an interior expandable zippered pocket within the pocketbook. Alternately, the pocket has a window to view such stored coin in the internal coin pocket portion, assisting a user in easy recognition and retrieval of desired coin from the pocket. It may, under appropriate circumstances, also be used on other personal item carriers such as, purses, handbags, wallets, backpacks, messenger bags, attachés, fanny packs, duffel bags, luggage, etc.

Abstract: A high resolution video graphics system for use with a processor and characterized by improved memory expandability particularly in connection with color display. The high resolution video graphics system includes a video memory which is preferably comprised of a plurality of video memory planes and video counter means for providing display timing. There are basically four buses that are used with the system including a control bus, a read bus, a write bus, and an address bus. A multiplexer means is provided for receiving either video counter addresses or direct addresses from the processor. There is associated with the video memory means for converting to serial output data which the preferred embodiment includes a series of shift registers corresponding to the number of separate memory planes employed. In the preferred embodiment the system has three memory planes, each of 16K by 16 capacity.

Abstract: An interface circuit is disclosed for connecting a digital computer to a modem or other peripheral circuit through either a standard digital signal (RS232) "port" or an audio-frequency "port" normally used by the computer to store and retrieve information on audio-frequency magnetic tapes. The interface circuit allows the modem to be used economically with a small computer which does not have a standard RS232 "port". In order to allow the modem to connect to the audio-frequency "port" the interface circuitry combines filtered audio signals received by the modem from an associated telephone line with RS232 signals generated by the modem decoding circuitry to produce tone bursts which can be decoded by the computer audio-frequency port. The interface circuitry can accept either RS232 signals or tone bursts from the computer to be transmitted by the modem by automatically adjusting an internal threshold level.