re iisi clock upgrades i have read one report of a brave soul who rewired the mhz clock and a higher speed clock oscillator s outputs through a double throw switch to allow different speeds there was no mention of any attempts to switch speeds on the fly but if the si uses timing loops anything like a quadra for accessing its floppy drive dynamic switching will wreak havoc a quadra must reboot after having its clock speed significantly changed or it will be unable to properly access its floppy drive
