To my surprise, PicoRAM 6116 () worked almost out of the box on the faster (Z80A-driven) MPF-IP. The only thing I needed to adjust was the analog input for reading the UI buttons - VCC is much more noisy on the MPF-IP; I guess that's because of the VFD. Also, this is Rev. 4 now of the PCB - the little bodge wire pulls down the WAIT line of the Z80. I hence no longer have to hold the Microprofessor in RESET while operating the PicoRAM (or during boot / power cycle).