. These processors have a combined Instruction and Data bus. They are a bit more flexible then the 3- bus architectur in that they have scalable clocking, scalable bus sizing and full JTAG support. The 29035 is the value model and the 29040 is the performance model, available with speeds of up to 50MHz. The 29040 has a hardware multiply (integer) unit but lacks a FPU.
Engineering Sample, also, this is the fastest 29000 series CPU made.