CN2100662U

CN2100662U - Computer lightpen and interface arrangement thereof

Info

Publication number: CN2100662U
Application number: CN91219054U
Authority: CN
Inventors: 刘待秋
Original assignee: GEDIAN CHEMICAL PLANT WUHAN CITY
Current assignee: GEDIAN CHEMICAL PLANT WUHAN CITY
Priority date: 1991-07-26
Filing date: 1991-07-26
Publication date: 1992-04-01

Abstract

The utility model relates to a computer lightpen and the interface device of the computer lightpen. The utility model is characterized in that the lightpen is composed of a pulse amplifier (11) which is composed of three triodes (T1, T2, T3), a bistable flip-flop (8) and the triodes (5) and (6); The lightpen is provided with a press-button (4); The output terminal of the interface device is connected with the SW1, SW2 AN0 of the GAMEI/O terminal of the host computer. The utility model is simple, small, cheap and convenient. The software with a special design makes the utility model which is the economical and practical input peripheral equipment of the cheapness and popularization computers have each functions of the existing lightpen.

Description

Computer lightpen and interface arrangement thereof

The utility model relates to a kind of light pen and interface arrangement thereof of computing machine, the light pen and the interface arrangement thereof of particularly a kind of CEC and APPLE computing machine.

In the prior art, when the lip pencil optical sensor, after the sensing CRT display frame, the positional information of nib on picture can be read by computing machine.It is to utilize on the display that is refreshed, and electron beam is by different positions, and its time, discrepant principle design was come out.The interface card relative complex that adapts with this technology on APPLE-∏ microcomputer costs an arm and a leg, and takies the expansion notch.This popular computing machine for a kind of cheapness that the utility model will be introduced is unfavorable, CEC computing machine particularly, and it only has a notch.

The utility model adopts the search gating technique, provides a kind of light pen that is applicable to cheap popular computing machine by specially designed light pen and interface arrangement thereof and support software, and its purpose is intended to solve the contradiction between described cheap computing machine and its expensive peripheral hardware.

Accompanying drawing 3,1 is the light pen of computing machine described in the utility model and the circuit theory diagrams of interface arrangement thereof.At the nib position of light pen shown in the accompanying drawing 3 one photosensitive device (1) is arranged, when light pen is pointed to CRT, photosensitive device (1) just can transfer the optical information on the picture to electric signal, deliver to two signal input parts of the light pen interface arrangement shown in the accompanying drawing 1 then through terminal board (3) by its two output signal line, on light pen, also be provided with a button (4), two leads that are connected by other two signal input parts of terminal board (3) and light pen interface arrangement are arranged under (4); The light pen interface arrangement is by three triode (T of a usefulness ₁, T ₂, T ₃) pulse amplifier (11) formed, a trigger flip-flop (8), one is reduced and disturbs with triode (5), and a protection constitutes the triode T in pulse amplifier (11) with triode (6) ₂Emitter and triode T ₃The inter-collector cross-over connection diode D is arranged; The output terminal of pulse amplifier (11) links to each other with the reset terminal R of the trigger flip-flop that is made of 555 integrated packages (8); The output terminal V of trigger flip-flop (8).Link to each other through the base stage of a resistance with triode (6), the collector of this triode then with through the lead-out terminal board (7) of light pen interface arrangement and described computing machine GAMEI/O(9) SW of interface ₂End links to each other; The triggering input end S of trigger flip-flop (8) connects through light pen by a resistance.The lead-out terminal board (7) of device and the AN of described computing machine GAMEI/O interface (9).End links to each other, and the base stage of triode (5) links to each other from two leads under the button (4) with aforementioned through resistance respectively with collector; The SW of the collector of triode (5) and light pen interface arrangement lead-out terminal board (7) ₂Be connected with a lead between the end.

Light pen is pointed to CRT press the button (4), the collector of the triode on the light pen interface arrangement (5) just is noble potential, and this is equivalent to press the recreation switch SW ₁, this provides a manipulator meeting easily to the user, and SW ₁State can in main frame, read on the ＄ cO62 address; Pulse amplifier in the light pen interface arrangement (11) is that a static state is very stable, and the dynamic very high amplifier of enlargement factor can be amplified to the threshold value that is higher than trigger flip-flop (8) reset terminal R with the sharp cutting edge of a knife or a sword from the signal of light pen, so that this trigger output terminal V ₀Be electronegative potential, be connected to SW thereby make ₂Collector be noble potential, this is equivalent to press game button SW ₂After calling the light pen finder, promptly start custom-designed search utility and find light pen indication position rapidly, with SW ₂Closure is according to SW ₂State change corresponding coordinate program over to, when the coordinate values of this position is quoted by the cursor statement in the computer software, mapping statement and other statement relevant with the screen position, just can realize light pen setting-out on screen, painted to the image of appointment, choice menus is being used functions such as light button.Bistable state is touched the triggering input end S of (8) if be triggered, and then the collector of (6) then is electronegative potential, and this is equivalent to unclamp game button SW ₂, SW ₂State ＄ cO63 in main frame can read this address.Trigger flip-flop (8) triggers the required undersuing of input end S, can take from the AN on the host game mouth easily ₀, this needs this address of visit ＄ cO59 earlier, and this address of back visit ＄ cO58 visits again this address of ＄ cO59 and just can realize, repeats the just available described light pen of aforementioned process in this way, with being intended to the enterprising line operate of CRT.

As above as seen, light pen described in the utility model and interface arrangement thereof have simply small and exquisite on hardware constitutes, easy for installation, advantage such as cheap, and specially designed software makes it possess every function that existing light pen had, and real be the popular computing machine economy of cheapness and input peripheral easily.

Below introduce drawings and Examples.

Accompanying drawing 1 is the utility model light pen interface arrangement circuit theory diagrams.(11) are pulse amplifier among the figure, and (5), (6) are triode, and (7) are that light pen interface arrangement lead-out terminal board (8) is a trigger flip-flop, and (9) are computing machine GAMEI/O interface.

Accompanying drawing 2 is used for the light pen interface arrangement circuit theory diagrams of CEC-I computing machine for this practicality.Compare only many triodes (10) in the present embodiment with the circuit of introducing previously.This is because the GAMEI/O of APPLE-∏ computing machine has AN ₀This signal, and the AN of CEC-I computing machine ₀This signal does not appear on the GAMEI/O, so the required AN of CEC-I computing machine light pen interface card ₀This signal just replaces (seeing accompanying drawing 2) by the CASSIN signal.This can be avoided connecing wire jumper from motherboard when the light pen interface board is installed, but this signal must for this reason, design the one-stage amplifier of mainly being made up of triode (10) through utilizing after the amplification.Be no less than this address of visit ＄ CO20 of twice, trigger flip-flop (8) is triggered, in fact, the employed technical scheme of light pen interface card of above-mentioned two kinds of computing machines is identical, and the difference right and wrong between them are substantial.

Accompanying drawing 3 is the utility model light pen structural representation.(1) is photosensitive device among the figure, and with reaching the quick triode of occulting light, (4) are button, and (3) are light pen terminal board.

Claims

A kind of computing machine light pen and interface arrangement thereof is characterized by: a button (4) is arranged on the light pen, under (4), have two by light pen terminal board (3) respectively with the light pen interface arrangement in the lead that links to each other with collector of triode (5) base stage; The SW of the collector of triode in the light pen interface arrangement (5) and its lead-out terminal board (7) ₁Between be connected with a lead, the light pen interface arrangement is by three triode (T of a usefulness ₁, T ₂, T ₃) pulse amplifier (11) formed, a trigger flip-flop (8), one is reduced and disturbs with triode (5), and a protection constitutes triode T in pulse amplifier (11) with triode (6) ₂Emitter and triode T ₃The inter-collector cross-over connection diode D is arranged; The output terminal of pulse amplifier (11) links to each other with the reset terminal R of the trigger flip-flop that is made of 555 integrated packages (8); The output terminal V of trigger flip-flop (8) ₀Link to each other through the base stage of a resistance with triode (6), the collector of this triode then with through the lead-out terminal board (7) of light pen interface arrangement and the SW of described computing machine GAMEI/0 (9) interface ₂End links to each other; The triggering input end S of trigger flip-flop (8) passes through a resistance through the lead-out terminal board (7) of light pen interface arrangement and the AN of described computing machine GAMEI/0 interface (9) ₀End links to each other.