TheWhiteFalcon
Well-known member
Put a 350MHz 604ev! 
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Any Full 68040 Upgrades For Powerbooks, Besides The 5xx Series?
- Thread starter Paralel
- Start date
techknight
Well-known member
Well as long as you have the correct chipsets. I think if any of the 6XX PPC line, and G3 line will electrically "fit" in a PPC system, i dont see why it wouldnt work. But, its the system bus speed thats going to be a problem, You cant really make it any faster than it is, and the clock multiplier relies on it unless you do something crafty. Sure the pinouts are going to be different, or even be BGA, but electrically they are compatible so you would have to redesign the card for sure.
But even if you did clock the processor outside of the bus clock, itll still insert wait-state after wait-state and basically hold up for the bus. So, you would need at the very least RAM and ROM that could keep up with the processor's clock, even though the peripherals and display controller cannot.
Oh.. then, comes the power consumption factor. I am sure the on-board voltage regulators wouldn't handle it. haha. So you would need to tap into a main B supply somewhere, and generate the core voltages on the CPU card itself.
I figured if you could go SSD, you could use the old HDD bay right next to the CPU card for running heat pipes and heasink/fans for a G3+
It wouldnt be fun. Thats for sure. But, I was figuring a pin-compatible PPC for PPC drop-in. With of course clock multiplier changes.
But even if you did clock the processor outside of the bus clock, itll still insert wait-state after wait-state and basically hold up for the bus. So, you would need at the very least RAM and ROM that could keep up with the processor's clock, even though the peripherals and display controller cannot.
Oh.. then, comes the power consumption factor. I am sure the on-board voltage regulators wouldn't handle it. haha. So you would need to tap into a main B supply somewhere, and generate the core voltages on the CPU card itself.
I figured if you could go SSD, you could use the old HDD bay right next to the CPU card for running heat pipes and heasink/fans for a G3+
It wouldnt be fun. Thats for sure. But, I was figuring a pin-compatible PPC for PPC drop-in. With of course clock multiplier changes.
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