Originally Posted by Cosmos
>Unless Cosmos made some other hacks?
The SDRam can handle 133 Mhz !
Yes, but you forget the CPU, speed of CPLD (the logic design is NOT guaranteed to work under 80Mhz) and several timing parameters involved in how we drive the SDRAM, which are violated now because we do a very quick 2-1-1-1 burst. This is only possible because we clock the RAM so slow. If your overclocking works (and you can only tell after running this configuration for several hours under extreme conditions), then it is purely by accident. Take another 68030, CPLD or SDRAM from a different wafer, and this might not work anymore.
For example, some 33Mhz 68030 can take 50Mhz, others fail miserably after a few minutes. This is no way how to design and sell hardware.
We strongly discourage this practice. There is nothing "cool" and innovative about this.