VHDL CACHE ?
Re: VHDL CACHE ?
Well, I let that overclocking to you and troed. Same as with overclocking FDC chip for HD floppies - some can work fine at 16 MHz, some not. With aged machines it will be just worse. Time too look after that Altera Cyclone ...
There is 2 kind of people: one thinking about moving to Mars after here becomes too bad, the others thinking about how to keep this planet habitable.
Re: VHDL CACHE ?
I brought the later SMT MMU's from atarifreaks a while ago.. latest date chips, so all should have good chance to overclock good. Original PLCC MMU seems to work OK, so later production of MMU should be fine 
Of course I need to find time to create MMU adapter PCB to use the SMT MMU.. Also need a small PLD to pack the GLUE logic also...
But my current booster design once I get working at 32MHz I will create new MMU PCB and use some spare IO pins on the booster PLD.. So CPU will run at 32Mhz and RAM at 16Mhz. Is the best solution I can do with the current custom ST chips.

Of course I need to find time to create MMU adapter PCB to use the SMT MMU.. Also need a small PLD to pack the GLUE logic also...
But my current booster design once I get working at 32MHz I will create new MMU PCB and use some spare IO pins on the booster PLD.. So CPU will run at 32Mhz and RAM at 16Mhz. Is the best solution I can do with the current custom ST chips.
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https://www.exxoshost.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxoshost.co.uk/atari/last/storenew/ - All my hardware mods for sale - Please help support by making a purchase.