HL is a register pair that is used to store 16-bit data in 8085 Microprocessor
The various 16-bit registers on the 8085 are BC, DE, HL, SP, PC.
with neat diagram explain the system bus structure of 8085
in 8085 only one accumulator used where in 6800 used two accumulator.
A subroutine is a group of instructions that will be used repeatedly in diff locations of the program..........rather than repeating the same instructions several times, they can be grouped into a subroutine that is called from diff locations. 8085 has 2 instruction set for dealing with subroutines: 1.CALL -direct the program execution to the subroutine. Generally it pushes address of next instruction of program counter onto the stack,then goes to the address of subroutine. 2.RET:- pops the address of next instruction from the stack and places it in the program counter and returns to that address to continue processing. For example, you have an often used value stored in HL. You have to call a subroutine that you know will destroy HL (with destroy I mean that HL will be changed to another value, which you perhaps don't know). Instead of first saving HL in a memory location and then loading it back after the subroutine, you can push HL before calling and directly after the calling pop it back. Of course, it's often better to use the pushes and pops inside the subroutine.
Because in many statements you use HL as a pointer to memory data, eg: LD B,(HL) SUB A,(HL) LD (HL),E
Intel 8085 is a microprocessor that is used in various electronics devices.
HL is a register pair used to store 16 bit of data in 8085 microprocessor.
8085 is a microprocessor designed by Intel
The 8085 was introduced by Intel in 1977.
The various 16-bit registers on the 8085 are BC, DE, HL, SP, PC.
The data size in the 8085 is 8 bits.
8085 is a 8 bit microprocessor designed by Intel Co.
for the purpose of computing.
with neat diagram explain the system bus structure of 8085
XTHL == eXchange Top of stack with HL
The 8085 is a 40 pin ic because Intel designed it that way.
+5v supply is alone needed for Intel 8085 Microprocessor