Status: 100% traced out. Schematic generated.
There are no EPROMs on this board.
Top of this board. This board houses some of the random phoneme timing logic, the silent phoneme detector, audio amplifier, and the bi-quad resonator/high pass filter for the vocalized sound generation. (Thanks to Lord Nightmare for the scan)
Bottom of this board. (Thanks to Lord Nightmare for the scan)
Schematic of this board. Pin designations not complete yet. (note: clicky for larger)