chip8 - CHIP-8 interpreter using C and SDL2.

Age	Commit message (Collapse)	Author	Files	Lines
2020-08-18	implemented keypad	Daniel Jones	1	-13/+75
	hex keypad is mapped to keys 1234,qwer,asdf,zxcv
2020-08-17	implement pixel XORing and wrapping	Daniel Jones	1	-2/+11
	sprites are properly XOR'd to the display, setting the 0xF register as appropriate. sprites also wrap on the bottom and irght side of the screen. because you can't access negative video memory, wrpaping top to bottom and left to right isn't implemented
2020-08-17	sprite drawing basic implementation	Daniel Jones	1	-2/+23
	begin implementing sprite drawing, currently draws the chip8 fontset well, no idead about other sprites yet
2020-08-16	began chip8 interpreter, reading rom file	Daniel Jones	1	-5/+26

2020-08-16	SDL init stuff, test code	Daniel Jones	1	-0/+105