Low-cost A600 acceleration theory

[Agafaster]

Although that 68000 sounds intriguing...

I presume that it runs at up to 20 MHz ?

I'd get hold of a couple of data sheets if I were you:
one for the 68k already in the 600, and another for the one you are interested in.

if they have the same package, and the pinouts are the same, you might want to replace the old one. (SME so very tricky unless you do this for a living !)

you will also need to change the clock crystal on the a600 mainboard (try to get a multiple of the one on there) but that might cause more trouble than its worth, as I believe the ECS chipset in the 600 relies on this for its timings as well - this could a) skew the video modes by a factor, b) overheat and therefore risk damage to the chipset.

so BEWARE !!

let us know how you get on !

[Agafaster]

Matt_H,

if you can just drop it in, you could do that, but dont solder the clock pin to the clock signal on the motherboard (~7.1Mhz). you could then take the clock signal from where the chipset gets it, and plumb that in.
however, you then bugger up the synchronisation of the Chip / CPU taking turns with the Chip RAM  so some sort of state machine would probably be in order, with a little FAST ram attached to the CPU so that you can actually make use of the extra speed.

I think, then,  we're really talking some sort of accelerator I'm afraid, so you may as well build one using a 68020 at least.
however, soldering an accelerator as replacement of the 68000 would be physically more stable than the clip-over-the-CPU variety sold by Power et al.
just less convenient, and probably makes closing the 600 inconvenient !