ROM:

Configurable ratio size of rendered canvas, min is 5 and max is 10:

Configurable speed of emulation, min is 1 and max is 20:

CHIP-8 KEY MAPPED KEY
1 1
2 2
3 3
C 4
4 Q
5 W
6 E
D R
7 A
8 S
9 D
E F
A Z
0 X
B C
F V