limtc wrote:
Seems like ProDOS is documented up to 1.9. I only know that 2.0 onwards it can only be used on 65c02 and above, no longer 6502.
It is notable that all versions of BASIC.SYSTEM run on a 6502. Only the ProDOS kernel requires a 65C02 in the last versions.
-- Linards Ticmanis