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Articles by karthikeya Boyini
Page 139 of 143
Instruction type DCR R in 8085 Microprocessor
In 8085 Instruction set, DCR is a mnemonic, which stands for ‘DeCRement’ and ‘R’ stands for any of the following registers, or memory location M pointed by HL pair. R = A, B, C, D, E, H, L, or M This instruction is used to decrease the content of register R. Also we can say it will subtract 1 from the register R content. And the decremented value will be stored on to the register R itself. As it is an arithmetic instruction, so all flags, except Cy flag, are affected depending on the result. In those assembly ...
Read MoreInstruction type DCX rp in 8085 Microprocessor
In 8085 Instruction set, DCX is a mnemonic that stands for “DeCrementeXtended register” and rp stands for register pair. And it can be any one of the following register pairs − rp = BC, DE, or HL This instruction will be used to subtract 1 from the present content of the rp. And thus the result of the decremented content will remain stored in rp itself. Though, it is an arithmetic instruction, note that flags are not at all affected by the execution of this instruction. A register pair is generally used to store 16-bit memory address. If ...
Read MoreDraw geometric shapes on images using Python OpenCv module
The basic operations of OpenCV is to draw over images. The ability to add different geometric shapes just like lines, circles and rectangle etc. Often working with image analysis, we want to highlight a portion of the image, for example by adding a rectangle that defines that portion. Also as example an arrow to indicate something. cv2.line() − This function is used to draw line on an image. cv2.rectangle() − This function is used to draw rectangle on an image. cv2.circle() − This function is used to draw circle on an image. cv2.putText() − This function is used to write ...
Read MoreGenerating Random id's using UUID in Python
UUID is having the full form Universal Unique Identifier, it is a python library which supports 128 bits ids for generating random objects. Advantages of UUID As discussed, we can use it to generate unique random id for random objects. For cryptography and hashing applications, this id can be used. For generating random documents and also addresses etc. this id can be used. Method1 Using uuid1() Example code import uuid print ("Random id using uuid1() is : ", end="") print (uuid.uuid1()) Output Random id using uuid1() is : 4adeede2-e5d8-11e8-bd27-185e0fd4f8b3 Representations of uuid1() bytes − ...
Read MoreHow to get synonyms/antonyms from NLTK WordNet in Python
The WordNet is a part of Python's Natural Language Toolkit. It is a large word database of English Nouns, Adjectives, Adverbs and Verbs. These are grouped into some set of cognitive synonyms, which are called synsets. To use the Wordnet, at first we have to install the NLTK module, then download the WordNet package. $ sudo pip3 install nltk $ python3 >>> import nltk >>>nltk.download('wordnet') In the wordnet, there are some groups of words, whose meaning are same. In the first example, we will see how wordnet returns meaning and other details of a word. Sometimes, if some ...
Read MoreInstruction type ANA R in 8085 Microprocessor
In 8085 Instruction set, ANA is a mnemonic, which stands for “ANd Accumulator” and “R” stands for any one of the following registers, or memory location M pointed by HL pair. R = A, B, C, D, E, H, L, or M This instruction is used to AND contents of R with Accumulator’s content. The result thus produced for this AND operation will be stored back in to the Accumulator over writing its previous content. As R can have any of the eight values, there are eight opcodes for this type of instruction. It occupies only 1-Byte in ...
Read MoreInstruction type ORA R in 8085 Microprocessor
In 8085 Instruction set, ORA is a mnemonic, which stands for “OR Accumulator” and “R” stands for any of the following registers, or memory location M pointed by HL pair. R = A, B, C, D, E, H, L, or M This instruction is used to OR contents of R with the Accumulator. The result of OR operation will be stored back in the Accumulator. As R can have any of the eight values, there are eight opcodes for this type of instruction. It occupies only 1-Byte in memory. Mnemonics, Operand Opcode(in HEX) Bytes ...
Read MoreInstruction type XRA R in 8085 Microprocessor
In 8085 Instruction, XRA is a mnemonic that stands for “eXclusive OR Accumulator” and “R” stands for any of the following registers, or memory location M pointed by HL pair. R = A, B, C, D, E, H, L, or M This instruction is used to Ex-OR contents of R with the Accumulator. The result of Ex-OR operation will be stored in the Accumulator. As R can have any of the eight values, there are eight opcodes for this type of instruction. It occupies only 1-Byte in memory. Mnemonics, Operand Opcode(in HEX) Bytes ...
Read MoreInstruction type CMC in 8085 Microprocessor
In 8085 Instruction set, CMC stands for “CoMplement the Carry flag”. It performs complement operation on the cy flag, and the result is stored back in the cy flag. Mnemonics, Operand Opcode(in HEX) Bytes CMC 3F 1 The result of execution of this instruction has been depicted in the following tracing table − Before After (Cy) 1 0 Address Hex Codes Mnemonic Comment 2001 3F CMC Complement of Cy when Cy=1 The timing diagram against this instruction CMC execution is as follows − Summary − So this instruction CMC requires 1-Byte, 1-Machine Cycle (Opcode Fetch) and 4 T-States for execution as shown in the timing diagram.
Read MoreInstruction type CMP R in 8085 Microprocessor
In 8085 Instruction set, CMP is a mnemonic that stands for “CoMPareAccumulator” and hereR stands for any of the following registers, or memory location M pointed by HL pair. R = A, B, C, D, E, H, L, or M This instruction is used to compare contents of the Accumulator with given register R. The result of compare operation will be stored in the Temp register. Temp is not a GPR (General Purpose Register) but an internal register that is not accessible to the programmer. Actually R register’s content will get subtracted from Accumulators content and difference value ...
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