Marpet Xtra-RAM Instructions and Pictures

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1024MAK
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Marpet Xtra-RAM Instructions and Pictures

Postby 1024MAK » Fri Mar 04, 2011 4:11 pm

Attached is a scanned copy of the Marpet Xtra-RAM Instructions
Marpet Xtra-RAM Instructions.zip

Marpet and similar DRAM upgrades - some pictures
Marpet DRAM upgrade - SIMM DRAM board.jpg

Marpet DRAM upgrade - Go Direct Ltd 4MB DRAM board.jpg

Marpet DRAM upgrade - MMU adapter.jpg

Marpet DRAM upgrade - MMU adapter (U56 with piggy back connector).jpg

Marpet DRAM upgrade - Shifter adapter.jpg

Marpet DRAM upgrade - Shifter adapter close up.jpg
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Re: Marpet Xtra-RAM Instructions and Pictures

Postby 1024MAK » Fri Mar 04, 2011 4:14 pm

And the resister connections:
Marpet DRAM upgrade +5V connections.jpg

Marpet DRAM upgrade +5V connections to resistors.jpg
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simbo

Re: Marpet Xtra-RAM Instructions and Pictures

Postby simbo » Sun Mar 06, 2011 8:02 pm

always thought it was a horrible addin
and no real fun
uses too many ic's and come loose causing shipping issues....
advice is to add some poly foam above the mmu etc to stop it bouncing off
if your going to do a ram add in make it as perminant as the original ram
with the least issues

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Re: Marpet Xtra-RAM Instructions and Pictures

Postby wongck » Mon Mar 07, 2011 12:52 am

Horrible or not.... may it can be better done I guess.

yes, I agree that the adapter for MMU escpecially the one on mine being a SMD type will come/bounce off.
Had some scary times, when it seems not to work but a good press on the adapter fixes it.
( bad for the leads, I am sure).
Friend of mine helped me by putting dollops hot glue to hold it.
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Re: Marpet Xtra-RAM Instructions and Pictures

Postby 1024MAK » Tue Mar 08, 2011 12:56 am

wongck wrote:yes, I agree that the adapter for MMU escpecially the one on mine being a SMD type will come/bounce off.
Had some scary times, when it seems not to work but a good press on the adapter fixes it.
( bad for the leads, I am sure).
Friend of mine helped me by putting dollops hot glue to hold it.

:arrow: Just like the one in the picture above (this was already fitted like this on a machine that I obtained)... :D
Have never had a problem with it :D
I guess that it was so popular, as some versions for Atari's with a socketed shifter were easy to fit (no soldering needed).
Falcon, Atari 520STFM, Atari 1040STE, more PC's than I care to count and an assortment of 8 bit micros (nearly forgot the Psion's)

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Re: Marpet Xtra-RAM Instructions and Pictures

Postby wongck » Tue Mar 08, 2011 1:29 am

Yeap. I can see hot glue at the side to hold it down.
Before it was hot glued down, I had to press it down for it to work.
But the solderless upgrade was a great thing!!
My Stuff: FB/Falcon CT63+CTPCI_ATI_RTL8139 14+512MB 30GB HDD CF HxC_SD/ TT030 68882 4+32MB 520MB Nova/ 520STFM 4MB Tos206 SCSI
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Re: Marpet Xtra-RAM Instructions and Pictures

Postby Atarist8te74 » Tue Aug 21, 2012 5:27 pm

I have just obtained an Marpet MP210A 4mb ram expansion. It is populated with sips not simms. It is in a rougth state, the mmu & shifter adaptor ribbons are slightly damaged. The pins on the mmu adaptor need straightening and the video shifter adaptor has a pin missing? The missing pin faces towards the back when it is fitted into the motherboard and is the very last pin underneath, row closest to the back of the board/case... if you get me?

I might crack open the digi camera and get some pictures.

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Re: Marpet Xtra-RAM Instructions and Pictures

Postby exxos » Wed Aug 22, 2012 10:00 pm

I have brought a STFM this week which has one of those marpet 4MB things fitted, its using 4 32pin simms, the "resistor mods" differ to the images shown too. Bit of a arse since I need to remove the kit and will have to replace the MMU socket no doubt :?


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