It's actually a SPC81A [1], which supports about only half of the 6502 opcodes. It is also used in some HP calculators.
[1] https://datasheet.datasheetarchive.com/originals/library/Dat...
It's actually a SPC81A [1], which supports about only half of the 6502 opcodes. It is also used in some HP calculators.
[1] https://datasheet.datasheetarchive.com/originals/library/Dat...