Summation of an Array-full Numbers

This Program will add an Array of 8 bit Numbers with Carry.
Assume that the size of Array is stored at the location 2050H and Array starts from 3000H.
The Result will be stored from 4000H.

Memory Loc Hex Code Label Mnemonics Comment 3050 3051 3052 3A 50 20 START: LDA 2050H ;Take the Size of Array in A (Accumulator) 3053 47 MOV B, A ;Store the Array Size in B 3054 3055 3056 21 00 30 LXI H, 3000H ;Initialize the Array pointer (HL Register Pair) with Address of First Element 3057 3058 16 00 MVI D, 00H ;Reset the Carry Holder (D Register) for Addition 3059 305A 3E 00 MVI A, 00H ;Reset the Result Holder (Accumulator) 305B 86 LOOP: ADD M ;Add Accumulator Content with Each Element of Array 305C 305D 305E D2 60 30 JNC NOCARRY ;If Carry is not created don't increase Carry Holder 305F 14 INR D ;If Carry is generated the Carry Holder will be increased by 1 3060 23 NOCARRY: INX H ;Point the next Element of the Array 3061 05 DCR B ;Decrease the Loop Scope 3062 3063 3064 C2 5B 30 JNZ LOOP ;If all element of the Array is not eveluated go back in Loop 3065 3066 3067 32 00 40 STA 4000H ;Store the LSByte of Result at Memory Location 4000H 3068 7A MOV A, D ;Move the MSByte of Result into A 3069 306A 306B 32 01 40 STA 4001H ;Store the MSByte of Result at the Memory Location 4001H 306C 76 HLT ;End of the Program

This Program has a Drawback that, it can perform on Array of size atmost 255.

Comments

2's Complement of 2Byte Number

This program will work out the 2's Complement of a 2 Byte Number. As Microprocessor can perform 8 bits at a time in Accumulator, so we follow the foloowing Algo Fetch the 2 Byte Number in a Register Pair Bring Least Significant Byte of the Number from last Register into A (Accumulator) Make Complement of A and add 1 Store back the Updated LSByte into its source Register Bring MSByte of the Number from another Register into A Make Complement of A and add 1 if carry was genetrated at the time of LSByte opeartion Store back the Updated MSByte into its source Register Store the Result to a Memory location Suppose, Argument Number is stored in Location 1000H and 1001H Memory Location and store the value in 2000H and 2001H Memory Locations. Memory Location Hex Code Label Mnemonics Comment 3050 3051 3052 2A 00 10 START: LHLD 1000H ;Load the HL Register Pair with the content of Memory Location 1000H and 1001H 3053 7D MOV A, L ;Move the Content of L to A ( Accumulator ) 3054 2F

Flip-Flop Conversion

Flip-Flop is a memory element. You can say a basic element. It is a circuit that can hold a binary state (0 or 1 as low or high volts) until an input to change that state. We have many flip-flops as SR Flip-Flop (Set Reset) D Flip-Flop (Data) JK Flip-Flop T Flip-Flop (Toggle) Those Flip-Flops are available in market in IC Package Form. Now You have a circuit that uses 1 JK and 1 D Flip-Flop and 3 NOT Gates. So you have to buy three ICs- one for JK, one for D and other for NOT Gate. Ultimately you will see that a flip flop in IC of JK, a flip-flop in D IC and 3 NOT gates are not used. Now, if you convert a JK flip flop into D flip flop then you didn’t have to pay for the D flip flop IC. So, your circuit will be made by 2 ICs in place of 3 and in cheap cost. This article is for that reason. How the Flip-Flops are converted from one to other. Procedure: 1. Write Qt and Qt+1 Table with 4 combination of 0 and 1. 2. Write columns for inputs of destination Flop-Fl op. 3. Write the ce

How to set Set-Top Box to Resume automatically to last Channel after switch on?

How to set customised automatic Resume Channel to last viewed in Set-Top Box? Introduction In the era of Digitally fast growing life WiFi enabled smart devices and also voice controlled smart devices are trying to be companion of every human being. But, all human do not change their habit at the same time. It may be cause of mental attachment or financial limits or unwillingness or though as unnecessary. What ever the reason may be, there exists the old technology, like IR(Infrared), RF(Radio Frequency), etc. So, this article for them who are using "Un-smart" TV like me in this time of Smart World. I was searching for a solution to set my Set-top Box of Videocon DTH (controlled by a RF Remote) to resume the last viewed channel when I power on my TV anytime. Suppose, I was watching NAT-Geo and switch off my (Un-smart) TV, even switch off the plug power at board. Now, after some time / on the next day, when I switch on my TV it will directly tune to the last viewed channel, i.

Amar HiziBizi Khata

Search This Blog