ReadAddAndLoop.asm

Language: 8080 Assembly
Last Modified: 2022-11-13 1:21:06 AM UTC
File Size: 1019 bytes

http://www.penguinstew.ca/example/AltairAdder/ReadAddAndLoop.asm

; Read Add and Loop Program, displays result of adding low and high value from switches using address lights

ORG 0000H

IN FFH ; 0000: DB FF Read value from switches

MOV B, A ; 0002: 47 Store value

ANI 0FH ; 0003: E6 0F Clear high part

MOV C, A ; 0005: 4F Store low part

MOV A, B ; 0006: 78 Load value

RRC ; 0007: 0F Rotate high to low

RRC ; 0008: 0F

RRC ; 0009: 0F

RRC ; 000A: 0F

ANI 0FH ; 000B: E6 0F Clear high part

ADD C ; 000D: 81 Add High to low

MOV D, A ; 000E: 57 Move to High address register

LP: LDAX D ; 000F: 1A Load (display) address

JMP LP ; 0010: C3 0F 00 Jump to display