In our experiments we used Micro 85 EB trainer kit from Vi Micro systems. The steps involved in doing programs in trainer kit are summarized below.
1.Write the program
2.Prepare the hex code of the program
3.Enter the hex code to trainer kit in suitable locations(eg:From 4100 H)
4.Give sufficient data for program in data memory(eg:From 4200 H)
5.Run the program
6.Check for output
The programming procedure is explained through an example. Consider the case of addition of two 8 bit numbers.
1.WRITE THE PROGRAM
MV1 C,00
LDA 4200
MOV B,A
LDA 4201
ADD B
JNC LABEL1
INRC
LABEL1:STA 4202
MOV A,C
STA 4203
HLT
2.PREPARE HEX CODE OF THE PROGRAM
Hex code is preparing in accordance with the Intel Hex file format.The hex code table is given below.Each instruction has a hex code. Consider the instruction ADD B.From the hex file format the corresponding hex code is 80.
Consider STA 4203 .The first location should contain the hex code of STA. That is 32.Next location should contain the LSB of 4203, that is 03.The next location should contain the MSB of the address,that is 42.
The hex code table is given below
The hex code of the above program is given below.
LABEL |
ADDRESS |
MNEMONIC |
CODE |
COMMENT |
LABEL1 |
4100 4101 4102 4103 4104 4105 4106 4107 4108 4109 410A 410B 410C 410D 410E 410F 4110 4111 4112 4113 4114 4115 |
MVI C,00 – LDA 4200 – – MOV B,A LDA 4201 – – ADD B JNC LABEL1 – – INR C STA 4202 – – MOV A,C STA 4203 – – HLT |
0E 00 3A 00 42 47 3A 01 42 80 D2 0E 41 0C 32 02 42 79 32 03 42 76 |
Write the meaning of each instruction in this column |
3.ENTER THE HEX CODE TO THE TRAINER
The obtained hex code now can be entered to the trainer. Assume the program is entering from location 4100. Now to enter the code,press SUB key +4100+NEXT key. Now the location will be 4100. Now start entering the program. After entering each code press the NEXT key to get the next location.
4.ENTER SUFFICIENT DATA
In the above program the two numbers which are to be added are to be supplied. Suppose the data memory is from locations 4200.To write data press SUB key +4200+NEXT key . Now the address will be 4200.Enter the first data in 4200.Now press NEXT key to get the next location .
5.EXCECUTE THE PROGRAM
6. CHECKING DATA MEMORY FOR RESULTS
ADDRESSES |
DATA |
INPUT/OUTPUT |
4200 |
05 |
Input |
4201 |
04 |
Input |
4202 |
09 |
Output |
4203 |
00 |
Output |
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