↑110010000100110110010

Not to be confused with ↓110010000100110110010.

↑110010000100110110010 is an esolang by User:PythonshellDebugwindow.

Memory

↑110010000100110110010 uses data (initialized to an right-unbounded infinite tape of zeros), a data pointer (initialized to 0), a command pointer (initialized to nil), and a jump offset (initialized to 0), all of which are unbounded signed integers (or, in the data's case, a right-unbounded tape of them).

Commands

The command is on the left, and the value of the command pointer is on the top.

	Nil	0	1	2	Anything else
↑	Increment the data pointer	Increment the data pointed to by the data pointer	Increment the jump offset	Increment the command pointer	Set the command pointer to 2
↓	Decrement the data pointer	Decrement the data pointed to by the data pointer	Decrement the jump offset	Decrement the command pointer	Input an integer to the data pointed to by the data pointer
0	Set the data pointer to 0	Set the data pointed to by the data pointer to 0	Set the jump offset to 0	Set the command pointer to 0	Jump backwards the number of times specified by the jump offset
1	Set the data pointer to 1	Set the data pointed to by the data pointer to 1	Set the jump offset to 1	Set the command pointer to 1	Jump forwards the number of times specified by the jump offset
↕	Set the command pointer to 0	Print the data pointer, then set the command pointer to 2	Print the data pointed to by the data pointer	Print the jump offset, then double the jump offset	Print the command pointer
↨	Set the command pointer to 3	Skip the next command if the data pointed to by the data pointer is not 0	Set the command pointer to nil	Skip the next command if the data pointer is not 0	Set the command pointer to nil

Programming in this language takes a lot of trial and error, and sometimes simple effects can take 3 commands. Due to the command pointer, and the sometimes not-so-obvious ways to change it as desired, you have to go through the whole program character-by-character to find out what any one character does.

Undefined behaviour

It's undefined behaviour when the data pointer goes negative, or when a jump goes out-of-bounds.

Snippets

To set the command pointer to 1 if it's at nil:

↨↑↓

Examples

One-time cat program

↨↓↑↓↕

XKCD Random Number

↑↑↑↑↕↕

Computational class

Unbounded data storage is available, so memory isn't an issue for Turing-completeness; the real problem is constructing a while loop (to effectively use the jump offset, garbage output must be produced (e.g., it's print then double), but this doesn't really matter), but if the command pointer can be effectively altered, which I suspect it can be, then there's no problem there, and the language is quite likely Turing-complete.

External resources

• An interpreter on GitHub