EchoSIOInt.asm

Language: 8080 Assembly
Last Modified: 2022-11-14 1:09:26 AM UTC
File Size: 933 bytes

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

;EchoSIOwithinterupts

ORG0000H

LXISP0100H;0000:310001Initalizestackpointer

MVIA01H;0003:3E01

OUT00H;0005:D300EnableSIOinputinterupt

EI;0007:FBEnableCPUinterupts

LOOP:NOP;0008:00

NOP;0009:00

NOP;000A:00

JMPLOOP;000B:C30800Programloop

ORG0038H;InteruptHandler

PUSHA;0038:F5SavevalueofaccumulatorandPSW

IN01H;0039:DB01

OUT01H;003B:D301Echovalue

POPA;003D:F1RestoreaccumulatorandPSW

EI;003E:FBRenableinterupts

RET;003F:C9return