У серого и черного +2 разные страницы медленной памяти.
On the 128K and Grey +2 Spectrums, memory pages 1, 3, 5 and 7 are contended.The Amstrad ASIC in the Black +2 / +3 differs more significantly in that it applies less contention than the 48K or 128K ULAs. Specifically, it applies contention only if the MREQ line is active, whereas the 48K ULA applies it under all circumstances. Unlike the the 128K or Grey +2 the Amstrad ASIC contends pages 4, 5, 6, and 7.


Ответить с цитированием
