Complex sentence: Another serious problem was the lack of any solution to quickly handle context switching, the i860 had several pipelines (for the ALU and FPU parts) and an interrupt could spill them and need them all to be re-loaded.
Split into simpler sentences: Another serious problem was the lack of any solution to quickly handle context switching. The i860 had several pipelines (for the ALU and FPU parts) and an interrupt could spill them and need them all to be re-loaded.