NABC

NABC is an esolang by User:ChuckEsoteric08 in which command is defined by number of a, b and c.

Specification

d is used to separate commands. Data is stored in Accumulator and stack. Line numbers are 0-indexed.
n(x) means "number of symbol X".

Name	Number of A	Number of B	Number of C	Meaning
inc x	1	2	x	Increment Accumulator by n(c)
dec x	2	1	x	Decrement Accumulator by n(c).
psh x	0	2	x	Push n(c) to the stack.
inp	3	0	1	Push ASCII value of next byte of user input to the stack.
psa	3	1	0	Push accumulator to the stack.
swp	2	4	0	Swap top stack elements.
peq x y	9	x	y	Pop and if that value is equal to n(b) goto n(c).
rev	4	2	0	Reverse Stack.
dup	5	5	0	Duplicate top element.
add	5	4	1	Pop value and add it to accumulator.
sub	5	3	2	Pop value and subtract it from accumulator.
set	0	0	0	Set accumulator to zero.
neq	3	4	3	Pop two numbers and skip next instruction if they are not equal.
jmp x	0	3	x	Jump to line n(c).
out	4	0	0	Pop number and output it as ASCII character.

Examples

Cat Program

A perpetually repeating cat program shall be demonstrated:

aaacdaaaad
bbb

Truth-Machine

A truth-machine is realized in the following:

bbcccccccccccccccccccccccccccccccccccccccccccccccccd
aaacd
aaaaabbbbbd
aaaaabbbbbd
aaaabbd
aaabbbbcccd
bbbccccccccccd
aaaad
aaaaabbbbbd
bbbcccccccd
aaaad

Interpreter

• Common Lisp implementation of the NABC programming language.