ShiftbB

ShiftbB (meaning "Shift bit Byte") is a cell-based esoteric programming language that uses 2 data units without explicit types: bits and bytes. The move pointer instructions are bit-sized and most of the other instructions are byte sized. The current byte is from your_position to your_position+8. Because there are no proper increment/decrement operators, setting a value involves manually setting the bits, and an "overflow region" where any extra data is destroyed.

Instructions

Instruction	Scope	Action
,	Bit	Decrement instruction pointer
.	Bit	Increment instruction pointer
1	Byte	Sets the current byte to 0x00
2	Byte	Sets the current byte to 0xff
_	Byte*2	Print operator. Prints previous byte as ASCII char if current byte is 0x00, prints previous byte as hex value if current byte is 0xff
/	N/A	Ends the program. Programs without this as the last instruction are undefined, and will segfault on the reference implementation
@	Byte	Sets the current position as the return, and sets the current byte as the left operand for a comparison
=	Byte	If current left operand == current byte, return to return
?	Byte	Sets current byte to user input

Examples

Hello World

1.2.1..2.1...1_.2..1..2.1.2.1_.2..1.2..1..1_.2..1.2..1..1_.2..1.2....1_..2.1.2..1..1_..2.1.....1_.2.1.2.1.2...1_.2..1.2....1_.2...1..2.1.1_.2..1.2..1..1_.2..1..2.1..1_..2.1....2.1_/

Cat

This implementation only allows 1 char at a time.

?........1_/

Truth Machine

If input is 1, loop. Else, halt.

?@........1_,,,,,,,,1..2..1...2,,,,,,,=/

Implementation

Reference implementation is at https://gitlab.com/KSPAtlas/shiftbb