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Author Topic: 14mhza500 on aminet  (Read 1227 times)

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Offline DamageXTopic starter

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14mhza500 on aminet
« on: May 01, 2006, 07:48:17 AM »
I was looking for plans for an amiga->VGA cable (which I did find, and build) and I came across this 14MHz A500 hack which involves simply swapping in a suitably-rated 68000 and feeding it a 14MHz clock. Kind of like overclocking a Genesis ;)

The text says that you should realize close to a 2x speed up when executing code from FAST RAM (and a lesser speed increase when working out of CHIP RAM). This makes me curious about how this would work in an A2000. Would a 14MHz 68000 have twice the bandwidth to zorroII memory cards? to ROM? Could the same benefits be granted to the A2630 in the processor slot by feeding a 14MHz clock to the 68000 state machine?

It would be nice. Right now the A2630 FAST RAM is about 6x as fast as ROM or zorroII RAM. And of course the A2630 chips are 100ns while the SIMMs on my GVP HC+8 have 60ns chips...
 

Offline DamageXTopic starter

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Re: 14mhza500 on aminet
« Reply #1 on: May 01, 2006, 08:49:37 PM »
so there's no bus speed-up afterall, just those ROR.W #8,D0 instructions and the like I guess. thank you