Yes! The worst thing about it is that it was at your fingertips the entire time - the reference manual was there and it was exact. The 68000 (not the 68020) didn't have cache so instruction timings were exact, so I had no excuse.
Three whole instructions worth of cache.
"Wha...?" you might say? Tha' heck good is that? The point was that the 3-instruction cache could cache tight loops, like the kind you would use for mem-to-mem copies, which is a terribly common thing to do. I put one in my Amiga 1000 (geez, did I hack that thing...) and got about a 10% overall system performance increase.
It was neat! More lovely details here: http://www.memphisamigagroup.net/diskmags/198803/68010-kit/M...