dual tape ez

dual tape ez is a simple tape machine. Every cell holds an instruction and a number.

About

About
Author	Charles McMarrow
User	User:Ch44d
Conceived	8/18/2021
Birthday	10/30/2021

Official Interpreter
pip install dual_tape_ez
https://github.com/cmcmarrow/dual_tape_ez

Instructions

Name	Instruction	Description
Halt	h	Stop the program.
Out Number	n	Outputs the number from item_1.
Out Character	c	Outputs the number as a UTF-8 character from item_1.
In Number	i	Read number from console into item_1. Falls back to 0 if error.
In Character	o	Read UTF-8 character from console into item_1. Falls back to "\0" if error.
Add	a	item_1 = item_2 + item_1
Subtract	s	item_1 = item_2 - item_1
Jump	j	pc = current value in memory
Jump Dynamic	k	pc = value from memory address in item_1
Jump Zero	z	pc = item_1 if item_2 == 0
Jump Greater	g	pc = item_1 if item_2 >= 0
Read	r	item_2 = item_1; item_1 = current value in memory
Read Dynamic	t	item_2 = item_1; item_1 = value from memory address in item_1
Read Dynamic Instruction	y	item_2 = item_1; item_1 = value from memory instruction address in item_1
Write	w	current location in memory = item_1
Write Dynamic	e	value from memory address in item_1 = item_2
Write Dynamic Instruction	d	value from memory instruction address in item_1 = item_2 if item_2 is a valid instruction
NOP	.	No operation performed.

Registers

Register	Description
pc	Holds the current program counter. At program start pc is set to the label "@". If Label "@" is not present an error will be thrown.
item_1	Set to 0 at program start.
item_2	Set to 0 at program start.

Memory

A single memory cell holds two items, instruction and data. The default instruction value is "." and the default data value is 0. Memory range is negative infinity to infinity.

Syntax

Syntax
<CODE> ::= {(([LABEL] INSTRUCTION [LABEL | NUMBER | CHARACTER | COMMENT] [COMMENT]) | COMMENT | "") NEWLINE}
<LABEL> ::= "@" {Any UTF-8 Character excluding white space}
<INSTRUCTION> ::= "n" | "x"
<COMMENT> ::= "#" {Any UTF-8 Character excluding NEWLINE}
<NEWLINE> ::= "\n"
<CHARACTER> ::= "c" (Normal UTF-8 Character)
<NUMBER> ::= An Integer

Sister Language

dual_tape

Programs

truth-machine

@ i # Truth Machine
r @zero
z
@one_loop r 1
n
j @one_loop
@zero r 0
n
h

Hello World

@hello_str . cH # Hello World
. ce
. cl
. cl
. co
. 32
. cW
. co
. cr
. cl
. cd
. c!
. 10
. 0

@ r @ptr
t
t
r @exit
z
r @ptr
t
t
c
r @ptr
t
r 1
a
@ptr w @hello_str
j @
@exit h