Lxi h,xx50 mov a,m inx h mov b,m mvi ,ffh inr c sub b jnc xx08 add b inx h mov m,c inx h mov m,a hlt
Lxi b, 0000h lhld 8000h xchg lhld 8002h dcx d l006: lda 8002h add l mov l, a lda 8003h adc h mov h, a jnc l013 l013: inx b dcx d mov a, d ora e jnz l006 shld 8006h mov l, c mov h, b shld 8004h hlt
Capital H has 2 lower case h has none
4: h/h, h/t, t/h & t/t
O h i o
Lxi h,xx50 mov a,m inx h mov b,m mvi ,ffh inr c sub b jnc xx08 add b inx h mov m,c inx h mov m,a hlt
In order to add 32 bit numbers in the 8085, you need to add them 8 bits at a time, tracking the carrys between each add. LXI B,first_number LXI H,second_number LXI D,result LDAX B ;first byte - no carry in ADD M STAX D INX B; point to next byte INX D INX H LDAX B ;second byte - carry in ADC M ;note the ADC instead of ADD STAX D INX B; point to next byte INX D INX H LDAX B ;third byte - carry in ADC M STAX D INX B; point to next byte INX D INX H LDAX B ;fourth - carry in ADC M STAX D
mvi c,ooh lxi h,foooh mov a.m lxi h add m jnc inr c inx h mov m,a inx h mov m,c hlt
Because that is the way Intel designed the INX instruction of the 8085. The 8080 is also the same. INX increments (and DCX decrements) the 16 bit register pairs or BC, DE or HL, depending on what register pair you specify in the INX (or DCX) instruction. To check is the value is 0 after an INX (or DCX) instruction, you need to OR the values of the register pair into the A register. For example..... INX H ;increment HL register pair MOV A,H ; move H register into the accumulator ORA L ; Logical OR it with the L register JZ ADDR ; If 0 then jump to ADDR
INX H instruction requires 1 machine cycle having 6 T-states because 8-bit instruction operate on 16 bit data (HL) completed in 6 T-states.
Block transfer in 8085... PUSH FLAGS {optional, if registers need to be saved} PUSH B PUSH D PUSH H LXI H,COUNT LXI B,SOURCE LXI D,DESTINATION LOOP LDAX B STAX D INX B INX D DCX H MOV A,H ORA L JNZ LOOP POP H {optional, if registers need to be saved} POP D POP B POP FLAGS
Lxi h, 2000h mov a,m mov b,a inx h mov a,m add b sta 2002h hlt
its in mnemonics : get the hex code from internet. MVI B,10H(REGISTER B AS A COUNTER) LXI H,C000H(SOURCE REGISTER, H-L AS MEMORY POINTER) LXI D,C050H(DESTINATION REGISTER) L1: MOV A,M STAX D INX H INX D DCR B JNZ L1 RST 1
The US State capitals that start with H are:Harrisburg, PAHartford, CTHonolulu, HI
· Hawaii is the only U.S. state that begins with the letter h.
One; Hawaii.
Lxi h,8000h // hl pointes to the location 8000 mov a,m // the value at 8000 copied to accumulator inx h // increment hl add m // add values at 8000 and 8001 hlt // quit the program