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Author Topic: MiniMig EAGLE schematic & flying board  (Read 4139 times)

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Offline wolfchild

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Re: MiniMig EAGLE schematic & flying board
« on: July 02, 2008, 04:32:22 PM »
@boing4000
Quote
Nice idea but don“t forget that the Minimig has an asynchronous external bus. Insinde the FPGA the RAM and CPU are handled synchronous to the "Amiga chipset". An external Gayle chip would run at far more speed then the internal Amiga (zorro) bus. Even the CPU do not hold by signal as the real 68000 in any Amiga is doing. Also the S-RAM is working at aprox. 50-60ns (depending on the chips and core settings), that is much faster then in a real Amiga.


So, this means that one cannot add memory mapped peripherals directly to the 68k?  You know, the kind that piggy backed to the socketed CPU on the old Amigas...

Of course, I'm considering issues as 3.3V and actually connecting to the MiniMig's 68k as 'solved' for the scope of this question.

Regards,
Edwin
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
self-built minimig 1.1 :: 10ns SRAM :: 3.5MB RAM::ARM board::2GB SD card
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