MMU SMT ADAPTERS - WIP

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exxos
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MMU SMT ADAPTERS - WIP

Post by exxos »

Somewhere I mentioned about the lack of PLCC MMU & GLUE, and that I have small stock of SMT versions which I may build onto the possible future mongrel motherboard...

Meanwhile, it does look like a SMT to PLCC adapter could be possible...

MMU_RISER.jpg
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The problem will be costs involved in getting these made, it could may well end up rather expensive compared to other chips have been, but as they're not so easy to obtain any more, then we need some sort for solution spares..

BEST has the MMU listed as $40, Which is simply ridiculous, like a lot of their prices.. But I am reasonably confident this adapter board would still be around half that price..
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Re: MMU SMT ADAPTERS - WIP

Post by exxos »

Looks like it all fits :)

Not to scale ;)

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sch.png
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Re: MMU SMT ADAPTERS - WIP

Post by exxos »

Totally forgot about this board again...

I've added it into my shopping trolley for PCBs to order :)

Still need to do the GLUE version yet...

0ca7074fa8833efabefb5d21c655291b.png
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Re: MMU SMT ADAPTERS - WIP

Post by exxos »

Dang it...

The 80 pin pinout doesn't list the GND connections :roll:

Does anyone have a board they can check ??? I don't seem to have one :(

SMD_GLUE_TROED.PNG
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Re: MMU SMT ADAPTERS - WIP

Post by troed »

exxos wrote: Fri Oct 26, 2018 7:43 pm Dang it...

The 80 pin pinout doesn't list the GND connections :roll:

Does anyone have a board they can check ??? I don't seem to have one :(
Sorry, just switched out my last SMT board last weekend :(
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Re: MMU SMT ADAPTERS - WIP

Post by exxos »

troed wrote: Fri Oct 26, 2018 10:12 pm Sorry, just switched out my last SMT board last weekend :(
dang it.. Someone must have one somewhere.... I've got some ST's at my girlfriends, will try and remember to look tomorrow...
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Re: MMU SMT ADAPTERS - WIP

Post by sandord »

exxos wrote: Fri Oct 26, 2018 10:17 pm dang it.. Someone must have one somewhere.... I've got some ST's at my girlfriends, will try and remember to look tomorrow...
What exactly do you need?
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Re: MMU SMT ADAPTERS - WIP

Post by exxos »

sandord wrote: Fri Oct 26, 2018 10:47 pm What exactly do you need?
Need to know which pins on the SMT 80 GLUE are connected to 0V...
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Re: MMU SMT ADAPTERS - WIP

Post by sandord »

exxos wrote: Fri Oct 26, 2018 10:57 pm Need to know which pins on the SMT 80 GLUE are connected to 0V...
Ah, mine is 68 pins. So there are ST revisions that have a 80 pins GLUE. Learning new stuff every day.
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Re: MMU SMT ADAPTERS - WIP

Post by exxos »

sandord wrote: Fri Oct 26, 2018 11:01 pm Ah, mine is 68 pins. So there are ST revisions that have a 80 pins GLUE. Learning new stuff every day.
yep.. look at the pinout I posted earlier..
https://www.exxosforum.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxosforum.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.
viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
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People should find solutions to problems, not find problems with solutions.
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