[rescue] Looking for broken IPX system board or chips

[Ethan Hawke]

Ah good catch, the CY7C601is indeed FPU-less, I double checked the 
pinouts (601, MB86903, W8701) and they are all the same, the FPU pins 
are labeled as No-Connect or Reserved on the integrated FPU parts.

The CY7C601 should work in the IPX but FP will be done in software. 
Better than no IU at all, at least it would be a rather unique IPX!

I don't have a SS2, but multiple SS2 compatibles (FORCE-2CE), which all 
use integrated FPUs like the IPX, I didn't realise the SS2 was different 
in that regard.

On 5/1/25 09:37, Scott Quinn via rescue wrote:
>
>   Are you certain the pinout etc is the same?  I'd definitely not risk
> it without hard info like datasheets or a schematic.
>
>   I think if one could drop a 16-context SS2 IU into an IPX, a lot of
> us would've done it back in the day, but it's not something I've ever
> heard of.
>
>                 -Dave
>
> I'll look up datasheets, but I can tell you one good reason why you 
> would want to be careful about a SS2 SPARC in an IPX - the CY7C601 
> doesn't have an onboard FPU and the IPX doesn't have a FPU socket, so 
> you won't have floating point.
>
>
>
>
> _______________________________________________
> rescue list -http://sunhelp.org/mailman/listinfo/rescue_sunhelp.org
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