JPS63193205A - Simultaneous execution system for tape parity check character decoding - Google Patents

Abstract

PURPOSE:To check the parity of tape command characters and decode the characters by providing a character decoding table and a character decoding table control means in a numerical controller to the taper command characters are inputted. CONSTITUTION:Tape commands from a paper tape reader PTR1 is inputted to the numerical controller 10. The controller 10 is provided with the character decoding table 5, which contains registered data 50 consisting of the code specification 51 of tape command characters indicated by the code numbers of the tape command characters in EIA code and ISO code and processing addresses 51 in addresses based upon said code numbers. A character decoding table control means 3 finds address in the table from the code numbers of input tape command characters, reads data 50 out of the addresses, and makes a parity check based upon the code specification 51 in the read data and also decodes characters based upon the processing addresses 52, thereby performing decoding processing for a constant time even with any tape command characters.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a simultaneous execution method for decoding tape parity check characters, and more particularly to a simultaneous execution method for decoding tape parity check characters in a numerical control device.

[Conventional technology]

Conventionally, in the parity check of the tape command character input to the numerical control device, the bit "1" (indicating "information present" when the tape hole is punched) of the 8-bit tape command character is counted. The number is E
IA (Electr.

nic Industries As5ociat
ion, Electronic Industries Association) code, a tape parity alarm occurs when the number is even;
international organization
n for 5 standardization
, International Organization for Standardization) code, a tape parity alarm was activated when an odd number was reached.

Furthermore, in character decoding of the tape command character input to the numerical control device, the input tape command character is an alphabet (A-Z).

6I: Signs (+ and -), numbers (0 to 9), skipping characters (blanks, etc.), special characters (left and right parentheses, etc.), and other (if the applicable character does not exist) It is necessary to perform E'2, and this confirmation is made by sequentially comparing the input tape command character with predetermined data indicating each character.

FIG. 5 is a block diagram showing the structure of an example of a conventional tape command character parity check and character decoding execution method. An example of a conventional method for performing parity check and character decoding of tape command characters is PTR (Punched Tape Re).
ader, Gion Tape: Sales device. Same below) 11 and
It is composed of a numerical control device 20.

The numerical control device 20 includes a PTR control means 12, a tape parity checking means 13, and a character decoding processing means 1.
4 and a character processing means 15.

PTR II to PTR control means 1 in numerical control device 20
The tape command character inputted to 2 is first passed to tape parity check means 13.

The tape parity check means 13 counts the number of bits of rlJ of the input tape command character and performs a parity check.

When the parity check shows that the number of "1" bits is an even number in the case of an EIA code, and an odd number in the case of an IsO code, a parity alarm is generated.

If the number of "1" bits in the parity check 7 of the tape parity check means 13 is an EIA code, the I
In the case of an SO code, when the number is even, the input tape command character and predetermined data indicating each character are sequentially compared by the character decoding processing means 14, and it is determined which character the tape command character corresponds to. (See FIG. 2 for the correspondence between tape command characters and characters.) Furthermore, a jump is made to an address in memory (not shown) where the processing content indicated by the character determined in this way is stored.Character decoding involves determining which character the tape command character indicates. This process also includes this jump process).

Next, the character processing means 15 extracts the processing contents indicated by each character from the jump destination address and performs the processing.

[Problem that the invention seeks to solve]

Parity check of the conventional tape command character described above.
) and character decoding have the disadvantage that a large amount of processing time is required for parity checking and character decoding because complex processing must be performed individually (in character decoding, the parity bit ( The 5th bit and I in the E■A code
Although there are improvement measures such as cutting the 8th bit in the SO code to reduce the number of data to be compared and shorten the processing time, the processing time still increases).

In addition, since the input tape command character and predetermined data are sequentially compared during character decoding to determine which character the tape command character represents, the corresponding predetermined data is determined by the tape command character. There is a drawback that the time it takes to reach the characters is different and the time for character decoding is not constant.

In view of the above-mentioned points, an object of the present invention is to provide a table called a character decoding table in a memory, to perform a parity check and a character decoding of an input tape command character almost simultaneously in a series of processes. To provide a tape parity chenok character decoding simultaneous execution method which can process the characters at high speed and decode any tape command character in a fixed time.

[Means for solving problems]

The tape parity check character decoding simultaneous execution method of the present invention uses a numerical control device that executes a parity check and character decoding of a tape command character input by a tape command.
A character decoding table having registration data consisting of the code designation and processing address of the tape command character indicated by the code number in the address based on the code number of the tape command character of the O code, and the code number of the input tape command character. The apparatus further includes character decoding table control means for determining the address on the character decoding table based on the character decoding table, reading the registered data of the address, and performing parity check based on the code designation in the registered data and character decoding based on the processing address.

[Effect]

In the tape parity check character decoding simultaneous execution method of the present invention, a character decoding table is created from an address based on the code number of the tape command character in the EIA code and the ISO code from the code designation of the tape command character indicated by the code number and the processing address. The character decoding table control means determines the address on the character decoding table based on the code number of the input tape command character, reads the registered data of that address, and performs a parity check based on the code designation in the registered data. and character decoding based on the processing address.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of the tape parity check character decoding and simultaneous execution method of the present invention. It is composed of.

The numerical control device 10 includes a PTR control means 2, a character decoding table control means 3, a character processing means 4,
It is configured to include a character decoding table 5.

FIG. 2 is an EIA/ISO code table showing which characters the 6EIA code and +30 code tape command characters input from PTRl correspond to. In the figure, O indicates that the tape is perforated.
In the EIA code, the number of O's is odd, and in the ISO code, the number of O's is even.

Referring to FIG. 3, the character decoding table 5 contains 1
It is configured on a memory (not shown) having 6×16=256 registration data 50. The tape command character of the EIA code and the ISO code consists of 8 bits, and there are 2"=256 possible combinations, so in order to correspond to all of them, a character decoding table 5 of the size shown in Fig. 3 is required. is necessary and this size is sufficient.

For example, the tape command character indicating character A of the EIA code is expressed by the code number 61H (H indicates hexadecimal notation. The same applies hereinafter), so in the character decoding table 5, there is a row indicating 608 and a column indicating IH. Registration data 50 corresponding to character A is allocated to the area specified by . At that time, this character A is EIA
Since it is a code, it is written in the upper part of the area (I
In the case of SO code, it is written in the lower row). In this way, the registration data 50 corresponding to all the characters in the EIA/, +50 code table shown in FIG. 2 are entered into the character decoding table 5.

Referring to FIG. 4, the registered data 50 in the character decoding table 5 consists of 16 bits (1 word),
Code designation 51 (FH beep) indicating whether the tape command character is an EIA code or an ISO code, E
(0 in the case of IA code and 1 in the case of ISO code), and a processing address 52 (bits EH to OH) indicating the address in memory where the processing content indicated by each character is stored. It consists of

Next, the operation of the tape parity check character decoding and simultaneous execution system of this embodiment configured as described above will be explained.

When the PTR control means 2 passes the tape command character input by the tape command from the PTR 1 to the character decoding table control means 3, the following calculation is performed.

[Hexadecimal value of code number of tape command character] +
"Start address on memory of character decoding table 5" - "Address to be accessed on character decoding table 5" The registered data 50 is read from the address on the character decoding table 5 obtained in this way.

Regarding this registered data 50, the code specification 51 is first checked for parity check (although it is not a parity check in the exact sense, it is set based on whether the number of 1 bits of the tape command character to which the parity bit is added is an odd number or an even number. Since the value of the specified code specification 51 is checked, a parity check (herein referred to as parity check) is performed. That is, the code system currently being processed (the code system has been instructed to the numerical control device 10 in advance) is EIA.
code, the code designation 51 is O, and IS
When the code is an O code, the code designation 51 should be 1, so if this is not satisfied, the character decoding table control means 3 issues a tape parity alarm.

When the code designation 51 indicates the code system currently being processed, the processing address 52 in the registered data 50 that has been read out is checked, and the memory in which the processing content indicated by the character corresponding to the registered data 50 is stored is stored. A jump to the upper address is performed and character decoding is completed.

Next, the character processing means 4 retrieves the processing content stored at the jump destination address and performs the processing.

〔Effect of the invention〕

As described above, the present invention provides a character decoding table and a character decoding table control means in a numerical control device into which tape command characters are input, thereby performing a parity check of tape command characters and character decoding in a simple process. can run fast,
This has the advantage that any tape command character can be deciphered in a certain amount of time.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, FIG. 2 is a diagram showing an ErA/ISO code table of tape command characters input to the numerical control device in FIGS. 1 and 5, 3 is a diagram showing the structure of the character decoding table shown in FIG. 1, FIG. 4 is a diagram showing the structure of registered data in the character decoding table shown in FIG. 3, and FIG. 5 is a diagram showing the structure of the conventional tape command character. FIG. 2 is a block diagram showing the configuration of an example of a parity check and character decoding execution method. In the figure: 1...PTR. 2... P T RI + Gohei means 3... Character decoding table control means, 4... Character processing means, 5... Character decoding table, 10... Numerical system '4n device, 50... Registration data, 51...Code designation, 52...Processing address.

Claims (1)

[Claims] In a numerical control device that executes a parity check and character decoding of a tape command character input by a tape command, the code number is sent to an address based on the code number of the tape command character of an EIA code and an ISO code. A character decoding table having registered data consisting of the code designation and processing address of the indicated tape command character, and an address on the character decoding table based on the input code number of the tape command character and reading the registered data of that address. A tape parity check character decoding simultaneous execution method comprising: character decoding table control means for performing a parity check based on a code designation in the registered data and character decoding based on a processing address.