JPC - это полноценный самодостаточный эмулятор платформы x86, написанный на чистой Java. Двухуровневая модель безопасности и полное отсутствие платформо-зависимых компонент позволяют изолированно выполнять х86-приложения на любых платформах, в том числе в браузере или на мобильном телефоне. На сайте проекта можно оценить возможности java-эмулятора на примере Damn Small Linux и игры Doom

FINC is a set of C networking extensions to John Sadler's excellent Ficl (Forth Inspired Command Language) interpreter. These are the first extensions I wrote and I'm working on becoming a more experienced Forth programmer. (I've read about Forth over the years and I once bought a Forth cartridge for my Commodore 64 [HES 64 Forth?] - but I immediately returned it because the instruction booklet was missing!)

Alex Measday's

Matrix stack language
From ScienceZero

A stack based programming language with a two-dimensional program counter

This is a stack based language with a two-dimensional program pointer. It has no practical purpose except for making you think. It was made for exploring the feasability of constructing a two-dimensional microcontroller. The concept of two-dimensional programs fits well with the human mind but seems to have no real benefits for a CPU. This project may surface again as a two-dimensional compiler. It uses reverse Polish notation.

Using reverse Polish notation makes it possible to make a language that is almost syntax free as opposed to the syntax quagmire of C++

-- Load and run the sample programs to learn how it works.
-- Click "Step" and hold down "Alt-R" to run the program slowly.
-- The Data Matrix is a 256x256 array of 8 bit unsigned integers.
-- The Stacks are 1000 elements deep.
-- There are 3 stacks Integer, Real and String.
-- All operations pull/push their operands from the stack.
-- <Delete> will move the rest of the line to the left.
-- <Insert> will move the rest of the line to the right
-- <Page Up> will move the line up.
-- <Page Down> will move the line up.


-- **** Program flow ****
-- > - right
-- v - down
-- < - left
-- ^ - up
-- # - compare, low=left high=right equal=straight on
-- ¤ - set Program Counter stride
-- jmp - set Program Counter
-- : - call function
-- ; - return from function
-- @ - stop

-- **** Data Matrix ****
-- u - up
-- d - down
-- l - left
-- r - right
-- x - memory x position = integer
-- y - memory y position = integer
-- ?d - integer = data Matrix
-- !d - data Matrix = integer

-- **** String Stack Operations ****
-- +" - join
-- len - integer = length of string
-- mid - string = char N
-- msg - message box string
-- val - integer = string
-- val. - float = string
-- dup" - duplicate
-- del" - delete
-- swp" - swap
-- ?" - peek string stack
-- !" - poke string stack

-- **** Real Stack Operations ****
-- +. - addition
-- -. - subtraction
-- *. - multiplication
-- /. - division
-- sqrt. - square-root
-- str. - string = float
-- and. - and
-- or. - or
-- eor. - eor
-- dup. - duplicate
-- del. - delete
-- swp. - swap
-- ?. - peek float stack
-- !. - poke float stack

-- **** Integer Stack Operations ****
-- + - addition
-- - - subtraction
-- * - multiplication
-- / - division
-- sqrt - square-root
-- and - and
-- or - or
-- eor - eor
-- int - integer = float
-- str - string = integer
-- chr - string char = integer
-- del - delete
-- dup - duplicate
-- swp - swap
-- ? - peek integer stack
-- ! - poke integer stack