Port FBFEh WRITE:
bit7-6 Reserved Not used (must should be zero)
bit5-0 Allophone number
* A new allophone number can be send when Status.Bit7=0.
* Only lower 6bit of databus are connected in the dk'tronics version.
* The remaining upper 2bit are GNDed via a 0 Ohm resistor.
For details on the speech chip, see:
* [[SP0256]]
* [[SP0256 Voice Generator]]