EchoSIO.asm

Language: 8080 Assembly
Last Modified: 2022-11-14 1:09:05 AM UTC
File Size: 350 bytes

http://www.penguinstew.ca/example/AltairSerialEcho/EchoSIO.asm

; Echo SIO

ORG 0000H

LOOP: IN 00H ; 0000: DB 00

RRC ; 0002: 0F

JC LOOP ; 0003: DA 00 00 Loop until byte received

IN 01H ; 0006: DB 01

OUT 01H ; 0008: D3 01 Echo Value

JMP LOOP ; 000A: C3 00 00 Loop