Changes
/* Datasheets (English) */
* SP0256B datasheet - includes info on TEST pin (but lacks the AL2 list)
* SP0250 Applications Manual - includes info on Voice Generator (or the older SP0250 chip, not the SP0256, but it works similar)
* SPR016 datasheet - external 16Kbit ROM - includes info on program counter and stack (which seems to be part of the internal/external ROM, not of the CPU)
* SPR-032 datasheet - external 32Kbit ROM
* SPR-128 datasheet (older) - external 128Kbit ROM preliminary 28pin package with undefined pinouts
