CHIP-8

Project: Face

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; An example program where a face jumps about. Wait for it to hit the corner 
; and you win. How exciting
;
; If you'd rather take control, you can also press the "S" key to toggle manual 
; control on and off.
;
; When in manual mode, you can move with:
; A: left
; D: right
; W: up
; X: down
; Some definitions. These must appear before any other instructions
DEFINE REGISTER X_COORD v0
DEFINE REGISTER Y_COORD v1
DEFINE REGISTER IS_MOVING_DOWN v2
DEFINE REGISTER IS_MOVING_RIGHT v3
DEFINE REGISTER IS_MANUAL_CONTROL v4
DEFINE REGISTER TOGGLE_DELAY v5
DEFINE REGISTER TOGGLE_KEY v6
DEFINE REGISTER MOVE_UP_KEY v7
DEFINE REGISTER MOVE_RIGHT_KEY v8
DEFINE REGISTER MOVE_DOWN_KEY v9
DEFINE REGISTER MOVE_LEFT_KEY vA
DEFINE REGISTER ONE vB
DEFINE BYTE RIGHT_LIMIT 56
DEFINE BYTE BOTTOM_LIMIT 26
; Jump to main entry point (Feels cleaner this way. You do you)
JP main
; Lets draw a face
; Indents don't matter. But we're not animals
smile:
    0b00100100
    0b00100100
    0b00000000
    0b10011001
    0b01000010
    0b00111100
moveVertical:
    ; If we're not moving down, jump to "moveUp"
    SE IS_MOVING_DOWN, 0
    JP moveDown
    JP moveUp
    
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

REGISTERS
MEMORY

General Purpose

v00x1521

v10x1521

v20x011

v30x011

v40x000

v50x1E30

v60x088

v70x055

v80x099

v90x000

vA0x077

vB0x011

vC0x000

vD0x000

vE0x000

vF0x000

Special Use

PC0x274628

I0x202514

DT0x000

ST0x000

SP0x11