Quote:
Originally Posted by Kai
Pandy - the PAK68 i already posted was a 68020 board that plugs into the 68k socket. 2-layer PCB only.
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Doable but not recommended especially for higher speeds...
Quote:
Originally Posted by SpeedGeek
@pandy71
If you replace the motherboard 7 Mhz 68000 with a 16 Mhz 68000 then you would have an E clock timing problem but if you leave the motherboard 7 Mhz 68000 present on the motherboard (A2000) or the Accelerator card has a socket for the original 68000 (A500) it can still generate the proper E clock! This also makes it possible to reboot in 7 Mhz 68000 mode.
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Sorry but not, CPU system will not work that way - if You clock Your CPU with twice higher clock, E clock will be also twice faster, CIA as IC can work but ALL CIA timing will be twice faster - this is not acceptable from Amiga point of view - E clock must remains constant for all time - ie You must supply to CIA's 0.7MHz clock and for non 7.xxx MHz 68000 You must create E clock and care about all VMA/VPA/E bus cycles in a way that will be transparent from CIA's point of view (recreate MC68000 functionality) - this is not very big problem, usually is made in one GAL/PAL.