CN1105768A

CN1105768A - Built-in multiple parallel interface shared device for printing machine

Info

Publication number: CN1105768A
Application number: CN 94100171
Authority: CN
Inventors: 徐非; 李建科
Original assignee: LIANXIANG COMPUTER GROUP CO BEIJING
Current assignee: LIANXIANG COMPUTER GROUP CO BEIJING
Priority date: 1994-01-17
Filing date: 1994-01-17
Publication date: 1995-07-26

Abstract

The present invention relates to a printer built-in multiple parallel interface shared device. Said shared device uses a multipath input technique, and makes each path input correspond to each path output of computer, and in the course of receiving output signal of computer it uses a control line which is completely identical with output so as to truely implement multiple parallel interface communication protocol. Its input insulating technique is suitable for output signal of various computers, and its built-in shared device is active driving, and its computr administration can make the shared device have intelligent capability. The multipath input signals can be automatically queued, and the output literals of various computers can be printed on the different output papers.

Description

Built-in multiple parallel interface shared device for printing machine

The present invention relates to the improvement of computer peripheral.

At present, the peripherals of computing machine such as printer have only a parallel entry usually.Therefore a computing machine can only be connected with a printer.When many computing machines are wished shared same printer, must use by " computing machine multiple parallel shared device ".The data that shared device can be automatically be input to printer to many computing machines manage, and removed plug wire from, pulled out the troublesome poeration of line, have improved the utilization factor of printer, for use provides convenience.This shared device is called the external shared device.Though the external shared device can solve the sharing problem of many computing machines to printer, the external shared device still has following weak point:

1. though many calculating functions are received on the printer simultaneously, printer can't be distinguished the information that the various computing machine transports.

2. can not really realize multiple parallel communication protocol, and external control line is incomplete.

3. external coupling adaptive faculty is limited.Because the external shared device needs from input, two aspects of output different computing machines and peripherals to be mated.Therefore, not only poor stability, and damage easily.

4. the external shared device is passive drive substantially, poor anti jamming capability, and transmission range is near.

5. when multimachine is printed simultaneously, can't print to not on the same page.

6. can not adjust the stand-by period.

7. the cost height uses inconvenience.

The purpose of this invention is to provide a kind of built-in multiple parallel shared device that is embedded in printer.

Technical scheme of the present invention realizes by following mode:

1. adopt the multichannel input technology, make the input of every road corresponding with every road output of computing machine.In the output signal process of receiving computer, used the on all four control line of output, so that real realization multiple parallel communication protocol.

2. adopt the input isolation technology, can adapt to the output signal of various computing machines, and good stability, antijamming capability is strong, and is not fragile.

3. built-in shared device is active driving, computer management.Therefore, make shared device realize intellectuality.

4. adopt inner queueing technique, can line up automatically, so that the literal of computing machine output can be printed on the different output pages to the multichannel input signal.

5. use internal timing to wait for technology, can use the manual adjustment stand-by period, make operation become more flexible each road input signal.

6. remove the shell and the patchcord of external shared device, not only easy and simple to handle, and reduced cost.

The present invention is described in detail as follows below in conjunction with accompanying drawing:

Fig. 1 is the block scheme that many computing machines are connected with printer by the external shared device

Fig. 2 is for many computing machines and with the connection box figure between the printer of built-in shared device

Fig. 3 is the block diagram of built-in shared device

Among Fig. 3, from

computer

1,2,3 multichannel output data, through multidiameter

delay input port

4,5,6 inputs of built-in shared device, behind

isolation buffer

7,8,9, deliver to internal data bus. Each road control signal is sent to queue circuit 13 again after

input control circuit

10,11,12 is differentiated. Queue circuit 13 is ranked to it according to the order that signal arrives. Microprocessor CPU14 reads each circuit-switched data according to the result of queuing. When free of data was imported, microprocessor CPU14 is touring to detect each road input, and adjusts the stand-by period on every road by timing circuit 15.

Embodiment:

Data latching: 373, data input latch: 74, input selects 153, data answering decoding 139, CPU is 80C188.The parallel port selects 273, and the parallel port input state isolates 264, and the parallel port output state is provided with 273.

The present invention compared with prior art has the following advantages:

1. cost is low;

2. the content sent here of different main frames is printed on not on the same page;

3. different main frames can not produce interference to the setting of different printers;

4. at the automatic choosing mouth of panel control/fixing choosing mouth;

5. control lag time on panel.

Claims

1, a kind of built-in multiple parallel interface shared device for printing machine, it is characterized in that: this shared device adopts the multichannel input technology, make the input of every road corresponding with every road output of computing machine, in the output signal process of receiving computer, used the on all four control line of output, so that real realization multiple parallel communication protocol; Adopt the input isolation technology, can adapt to the output signal of various computing machines, built-in shared device is active driving, and computer management makes shared device realize intellectuality; The literal of computing machine output adopts inner queueing technique, can line up automatically, so that can be printed on the different output pages to the multichannel input signal; Adopt internal timing to wait for technology, can use the manual adjustment stand-by period, make operation become more flexible each road input signal; Cancelled the shell and the patchcord of external shared device, made easy and simple to handlely, cost is low;

2, built-in multiple parallel interface shared device for printing machine according to claim 1, it is characterized in that: from the multichannel output data of computing machine, multidiameter delay input port input from built-in shared device, after isolating buffer, deliver to internal data bus, each road control signal is sent to queue circuit again after input control circuit is differentiated, queue circuit is ranked to it according to the order that signal arrives, and CPU reads each circuit-switched data according to the result of queuing.When no datat was imported, CPU is touring to detect each road input, and is adjusted at the stand-by period on every road by timing circuit.