Short: 14MHz accelerator update Architecture: generic This is a bug fixed version of the 3rd release of the 14 MHz accelerator. It seems that the CDAC replace is not 100% reliable, so if it does not work, cut the trace on the solder side of the PCB to pin 9 of the 74F86 and use CDAC from the motherboard as input. This may be confusing now, but when you see it this thing should be clear.