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Interest in adapting 744x to 7400?

herd

Well-known member
I was looking at the pin-out for the 7447 and I think it could be adapted to the 7400. Would people be interested in this? The main application I can see would be to install faster 7447 chips onto these boards for use in the Cube:

533cpub.jpg

These boards fit a Cube and are relatively available; the 7447 chips are also available.

The 7400 pin-out is also similar to the pin-out on a few versions of "G3" chips, so an adapter might allow 7447 chips to be installed on a few different G3 boards. The Pismo comes to mind, from this thread:


Or maybe time would be better spent on recreating that adapter between the 750 and 750FX pin-outs? Those chips are also available and go up to 1GHz or so.
 

Byrd

Well-known member
Would the interposer (I'm assuming) cause height issues needing significant mods to the G4 Cube heatsink?
 

herd

Well-known member
Yes, I'm talking about an adapter. With a new board you could do whatever you want.

In case the link goes dead, here are a couple of the pictures:

750FXa.jpg


750FXb.jpg
 

LightBulbFun

Well-known member
ooh yeah id be very interested in seeing an interposer developed!

I know there is someone on here who has made a 7450-7455 BGA483 to BGA360 interposer to retrofit 7447A's and 7448's to existing DA/QS/MDD cards

but it would be awesome to see such an interposer for all the other PPC CPU's "sockets" :) esp something like the 750CX/CXe socket

would be lots of fun to cram a 7448 into an iBook G3 clamshell or iMac G3 :) and having an interposer for the original 750/7400 socket would be good for upgrading everything from Kanga's to Pismo's :) and it would also be neat to see the Above 750GX interpose recreated :)


(as a side note id love to see one of the BGA483-BGA360 interposed slapped onto a Sonnet 7450/7455 G4 7300-9600 upgrade card and make a completely Over powered 7448 based 9600 LOL)
 

Nixontheknight

Well-known member
ooh yeah id be very interested in seeing an interposer developed!

I know there is someone on here who has made a 7450-7455 BGA483 to BGA360 interposer to retrofit 7447A's and 7448's to existing DA/QS/MDD cards

but it would be awesome to see such an interposer for all the other PPC CPU's "sockets" :) esp something like the 750CX/CXe socket

would be lots of fun to cram a 7448 into an iBook G3 clamshell or iMac G3 :) and having an interposer for the original 750/7400 socket would be good for upgrading everything from Kanga's to Pismo's :) and it would also be neat to see the Above 750GX interpose recreated :)


(as a side note id love to see one of the BGA483-BGA360 interposed slapped onto a Sonnet 7450/7455 G4 7300-9600 upgrade card and make a completely Over powered 7448 based 9600 LOL)
800MHz+ would be really nice on a 9600
 
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