if i remember correctly there is a 28mhz signal on the amiga mobo for denise? ive heard of 8mhz clocked over 20mhz but not to 28. a 16mhz might do.
still youd have problems of locking the machine amigas have a very tight cpu/chipset/os messing to much can cause problems. more ram and a slight speed up would be better.
