#!/usr/bin/env python
"""
Just some doc of GBC opcodes
"""

OP_CODES = {
    '8-bit loads': [0x06, 0x0E, 0x16, 0x1E, 0x26, 0x2E, 0x36],
    'reg-to-reg loads': list(range(0x40, 0x80)),
}

# for loads:
LD_REGS = ['B', 'C', 'D', 'E', 'H', 'L', '(HL)', 'A']
def load_source(op):
    return LD_REGS[op & 0x7]

def load_dest(op):
    return LD_REGS[(op >> 3) & 0x7]

def main():
    for cat, ops in OP_CODES.items():
        print("Category: {}".format(cat))
        for op in ops:
            print("{} - {} - LD {}, {}".format(
                hex(op),
                bin(op)[2:].zfill(8),
                load_dest(op),
                load_source(op)
            ))

if __name__ == '__main__':
    main()