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No, that's not true. Both the hardware and the OS remained compatible, although enough differences crept in that applications could get into trouble anyway. On
by agent327 5y ago
No, that's not true. Both the hardware and the OS remained compatible, although enough differences crept in that applications could get into trouble anyway.
One common problem was when applications assumed all memory was reachable by the custom chips; the later addition of fast ram (which was ram that wasn't slowed down by custom chips accessing it, thus starving the CPU of memory cycles) could break those. Another example is using the upper 8 bits of pointers, which was safe on 68000 but not on 68020 and up which had a full 32-bit address bus. Making assumptions about OS structures was also a favorite of many hackers, and something that invariably broke on later OS releases. However, if you stuck to the API you were fine, and many applications run without problems on all OS releases from 1.2 to 3.1.
- pjmlp 5y agoThere were three generations of graphics hardware and sound chips, anyone doing any kind of serious use of them had to recode their applications to take advantage of the new capabilities.
- rasz 5y agoAfaik there was ever only one Paula.
- pjmlp 5y agohttps://en.m.wikipedia.org/wiki/Amiga_Advanced_Graphics_Architecture https://en.m.wikipedia.org/wiki/Amiga_Advanced_Graphics_Arch...
- icedchai 5y agorasz was still correct about Paula though. The sound chip didn't change. Too bad AGA was too little, too late. If it was released a few years sooner, say with the A3000, it might've been different. ECS barely added anything over OCS, other than extra chip RAM. There were a few modes hardly anyone used.