Kevin D. Kissell (kevink@mips.com) writes: > > Note that SYNC on TX39/H and TX39/H2 does not flush a write buffer. > > Some operation (for example, bc0f loop) are required to flush a write > > buffer. > > That is, I would say, a bug in the TX39 implementation of SYNC. That's only a problem if the CPU permitted reads to overtake buffered writes. [Early R3000 write buffers did that (with an address check to avoid the disaster of allowing a read to overtake a write to the same location).] But my recollection is that the TX39 does all memory operations in order: so SYNC has very little to do, but it isn't a bug. Dominic Sweetman Algorithmics
