I use Arch btw source code is text encoded in ASCII.
I use Arch btw programs are given the following resources:
- a working memory of 65,536 (2^16) 8-bit bytes,
- a pointer initialized to point to the first byte of working memory, referred to as the data pointer,
- an input file,
- an output file.
They can use these resources through commands represented in source code by keywords.
Source code can contain comments that will be ignored during lexical
analysis. Comments start with the semicolon character (';') and stop at the
end of the line.
Programs are a sequence of commands represented in source code by the following keywords:
| Keyword | Meaning |
|---|---|
i |
Increment the data pointer by 1. It is an execution error to do so when it points to the last byte of the working memory. |
use |
Decrement the data pointer by 1. It is an execution error to do so when it points to the first byte of the working memory. |
arch |
Increment the value pointed to by the data pointer by 1. If it was 255, then it becomes 0. |
linux |
Decrement the value pointed to by the data pointer by 1. If it was 0, then it becomes 255. |
btw |
Write the value pointed to by the data pointer as character to the output file. |
by |
Read a character from the input file into the value pointed to by the data pointer. |
the |
If the value pointed to by the data pointer is zero, then continue execution of the program after the matching way keyword. |
way |
If the value pointed to by the data pointer is not zero, then continue execution of the program after the matching the keyword. |
gentoo |
Call the debugging event handler. |
Keywords are separated by whitespace, defined as a sequence of one or more of the following characters:
- horizontal tab (
'\t'), - new line (
'\n'), - carriage return (
'\r'), - space (
' ').