Shortcut for add

[spixi]

Currently, GBz80 to Items does not support the shortcut for add a, X, where X is a register or an address stored in register hl. This does not affect the case where X is a 8 bit integer constant. The mnemonic sub is not affected.

The following instructions

add a
add b
add c
add d
add h
add l
add [hl]

are equivalent to

add a, a
add a, b
add a, c
add a, d
add a, h
add a, l
add a, [hl]