![]() ![]() The actual memory used in yer typical Amiga (or ST, even) was 150ns. Even the IBM PC used DRAMs faster than 300ns (it was either 250 or 200, I forget which). 400-ish nanosecond latency is slooooooow for this kind of machine. This could have been figured out just by looking up what actual hardware is in an Amiga, or even any typical 16-bit computer. NOTE: This will only increase bandwidth between cpu chip-ram and not the bandwidth between Amiga Chipset chip-ram. In other words cpu access chipram (and chipregisters) every other timeslot and therefore it needs to be quadrupled in clockspeed. Why does cpu need to be four times as fast to increase the bandwith?īecause of the interleaved approach to chipram between cpu and amiga chipset this together with the fact that - as mentioned above - it takes 4 cpu clock cycles to fetch data from chipram (and fastram). The synchronization require cpu clock to be a multiple of masterclock. at the same speed as masterclock to double the bandwidth. The cpu clock need to be at least four times as fast, i.e. ![]()
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