ReadHighAndLoop.asm

Language: 8080 Assembly
Last Modified: 2022-11-13 1:21:13 AM UTC
File Size: 690 bytes

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

; Read High Value and Loop Program, displays value read from high nibble switches using address lights

ORG 0000H

IN FFH ; 0000: DB FF Read value from switches

RRC ; 0002: 0F Rotate high to low

RRC ; 0003: 0F

RRC ; 0004: 0F

RRC ; 0005: 0F

ANI 0FH ; 0006: E6 0F Clear high part

MOV D, A ; 0008: 57 Move to High register

LP: LDAX D ; 0009: 1A Load (display) address

JMP LP ; 000A: C3 09 00 Jump to display