JPS6373331A - Data processor - Google Patents

Abstract

PURPOSE:To attain the indirect designation of a command group in a microprogram by providing a display means which displays the direct designation or the indirect designation of the command group, and an updatable memory means. CONSTITUTION:A write circuit 70 writes the command group designated indirectly from a memory means 50 by an instruction from a processing circuit 60. The readout of the memory 50 is received by an address 401 from a switching circuit 40 assuming the content of a signal from a control memory 10 as a bit of address information, and a read out result is sent as a signal 501. A switching circuit 30 follows the set content of a display means 80, and when designation is the indirect designation the readout result of the control memory 50 is selected, and when it is the direct designation the readout result of the control memory 10 is selected and the content is set in a microprogram register 20. Thus, it is possible to designate the command group in the microprogram indirectly.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a data processing device, and particularly to a data processing device controlled by a microprogram.

[Conventional technology]

Conventionally, in this type of data processing device, especially when changing the microprogram is difficult, data is received and passed between processing sequences in a predetermined register (sometimes a memory flip-flop) controlled by the microprogram. After storing the delivery data, the corresponding processing sequence is generally started.

[Problem that the invention seeks to solve]

In such a data processing device, the transferred data is used to execute the processing, but if the transferred data is not a data value used for an operation, etc., but a parameter to control the operation, Alternatively, if the parameter specifies an operation in an area that can only be specified by a combination of commands in a microprogram, it is necessary to sequentially judge the contents and select and restart the sequence corresponding to each operation. Become.

Therefore, when a parameter requiring such an operation is given, in the conventional data processing apparatus, not only the processing steps are increased, but also the performance is reduced.

[Means for solving problems]

The data processing device of the present invention includes means for displaying whether a command group in a microprogram is directly designated or indirectly designated, and a memory means that can be updated according to instructions from the microprogram.
When the display means is displaying indirect designation, the information of a part of the command group in the microprogram is read out from the memory means as an address, and the result is placed in part or all of the command group in the microprogram. and means for executing the microprogram instead.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows an embodiment of the invention. In FIG. 1, this embodiment includes a processing circuit 6o, a writing circuit 7o, and a control memo! ,
J ] 0, and the processing circuit 6o is hardware that operates according to a microprogram, and operates in response to a signal 201 from the microprogram register 2o that stores the microprogram.

Writing port #! A numeral 70 writes a command group indirectly designated into the memory means 5o according to instructions from the processing circuit 6o. The control memory 1o is a memory that stores a microprogram, which is read out using the address signal 601 from the processing circuit 6o, and provides the result to the microprogram register 20 and the switching circuit 30.4.0 using signals 101 and 102.

Here, command 10 sent by control memory 1o
1 is a group of commands that are executed without depending on the settings of the display means 8o, and a command 102 sent out by the control memory 1o is a group of commands that can be selected depending on the settings of the display means 8o. The display means 80 is a display means for displaying whether the command group 102 specified in the control memory 1o is a direct specification or an indirect specification, and is set to either one depending on the contents of the microprogram stored in the microprogram register 20. The memory means 50 is a memory for storing parameters to be delivered, and in this case, a command group having the same format as the command group 102 given by the control memory 10 is stored.

Writing to this memory 50 is performed using address information 702. This is performed using the write data 703, but during writing, the switching circuit 40 is switched to the address information 702 side using the signal 701.

Further, for reading, the content of the signal 102 from the control memory 10 is regarded as address information and is received by the address 401 from the switching circuit 40, and the read result is sent out as the signal 501. The switching circuit 30 selects the result read from the memory means 50 in accordance with the setting contents of the display means 80 if the setting is indirect specification, or selects the result read out from the control memory 10 if the setting is direct specification, and transfers the contents to the microprogram. Set in register 20.

〔Effect of the invention〕

As explained above, the present invention enables indirect specification of a command group in a microprogram, thereby: 1. It is possible to dynamically change the operation sequence of a microprogram without rewriting it.

2. By enabling dynamic changes to the microprogram, the flow of the processing sequence can be easily controlled and the structure of the microprogram can be simplified.

There are other effects.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an embodiment of the present invention.

Claims (1)

[Claims] means controlled by a group of commands written in a microprogram and for displaying whether the command group is direct specification or indirect specification; memory means updatable by the display of the microprogram; and the display means indicates indirect specification. means for reading out the memory means using part of information of a command group in the microprogram as an address, replacing part or all of the command group in the microprogram with the result, and executing the microprogram; A data processing device comprising: