040 to 060 Adapters

[gseb]

For now no, but maybe later again.

Here is the line :

dabb
matt3k
Masta_Magoo
wmaciv
mawk2

 

[gseb]

Adapter sent @oguzog, timtheloon

 

[limboy777]

For now no, but maybe later again.

Here is the line :

dabb
matt3k
Masta_Magoo
wmaciv
mawk2

I would like one also

 

[maw2k]

@gseb do you have some sort of estimation?

 

[gseb]

Tpope and dabb did not replied to my PM.

PM sent @matt3k

 

[PowerCMIS]

Hi.I am interested in an adapter.

 

[matt3k]

Pm sent. Stating I am interested d just was confirming that it works in warp engine

 

[matt3k]

Perfect I will take it thanks. I will be tomorrow when I return from travel.

 

[matt3k]

Payment sent.

 

[wmaciv]

Received adapter today; excellent work as always. Well packed. I particularly like the super low profile socket and black mask. Looks great. Thanks!

 

[pcauchy]

Sounds like a great project, many people have speculated about doing this and its effects/requirements (patched ROM to translate 040-specific instructions?) but no one actually got round to doing it! It would be great if you posted your results somewhere!!

 

[Ricardo zaca]

declare interested ... still available? this board comes complete, assembled with all components, excludes 68060, of course....thanks

 

[pcauchy]

I am also planning to do this at some point in an LC475

This has also been discussed there:

https://mac68k.info/forums/thread.jspa?threadID=299

I guess a good starting point would be to do a ROM dump from Basilisk running in 68060 mode as it will have patches to 68040-specific instructions like FPU state frame layout or PTEST. Then write it to a custom, programmable ROM SIMM using

https://www.bigmessowires.com/shop/product/mac-rom-inator-ii/

and

https://www.bigmessowires.com/shop/product/rom-simm-programmer/

Could probably help!

Not too sure about the clock multiplier though, as Classic Mac OS uses the 68040 in supervisor mode (and would undoubtedly do the same with a 060), and clock multiplier is only available in user mode (68040 compatibility mode) from what I read. So it could be that the 50Mhz clock has to be supplied directly by a PLL or crystal to the 060 rather than using the bus clock which would be doubled in 040 mode.

Good luck

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Btw also declaring interest if any boards left