Quote:
Originally Posted by zipper
Supra did have "huge" 16 kB static RAM cache and did need some Fast RAM to get benefit of it. It was a nice card after all.
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It was pretty much a necessity for products like the SupraTurbo and ICD AdSpeed, as they were positioned as budget accelerators with no onboard fast RAM, but since the 68000 lacked an internal cache they'd be reduced to a crawl by slow memory unless they were given some sort of cache.
Budget no-fastmem 68020 and 68030 cards like the Sapphire got away with it since the 020 and 030 had their (tiny) onboard caches, but the large-cache 68000 accelerators often wound up faster for code/data that didn't fit well in 256 bytes even though the 68000 took more cycles for the instructions themselves.
They are even faster than a stock A1200 thanks to chipmem latency starving the poor 68020.