Tal or Uxntal is a stack-based assembly language designed for the Uxn virtual machine. There are 256 instructions designed to work within a 16-bit space. The Uxn specification provides Tal with a 256 byte data-stack and 64kb of RAM. The language even features support for anonymous functions.

Sample Code

@fib ( num* -- numfib* )
	#0001 GTH2k ?{
		POP2 JMP2r }
	SUB2k fib STH2 INC2
	SUB2 fib STH2r
		ADD2
JMP2r

@paint-sprite ( x* y* -- )
	.Screen/y DEO2 ( set y position )
	.Screen/x DEO2 ( set x position )
	#16 .Screen/auto DEO ( set length 2 with auto y and addr )
	;23x-icns .Screen/addr DEO2 ( set addr )
	#01 .Screen/sprite DEOk DEOk DEO ( draw 3 rows of 1-bit sprites )
	JMP2r

@23x-icns
	( 0 ) ( 1 )
	( 0 ) 0010 2847 2810 0001 0000 00e0 2040 8000
	( 1 ) 0204 080f 0000 0001 0000 00e0 2040 8000

Uxn

Uxn is a small stack-based computer with an implementation-first design. It is specialized for building small, low-energy, audio-visual applications. The specification for Uxn fits onto a single page, and its implementation is 100 lines of C. Finally, it powers the personal computing stack called Varvara.