(Topic ID: 228208)

Can I use two 5101 NVRAMs on a MPU200?

By oldschoolbob

1 year ago

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  • Latest reply 1 year ago by oldschoolbob
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#2 1 year ago

Should work fine with 2x 5101 nvrams.

#6 1 year ago

Tip On Removal Of MPU200 NVRAM
A few MPU200 designs out there using compact boards. Regardless of what brand you go with, you'll want to take care if you have to remove the nvram from the MPU. The two dual wipe sockets will hold onto the buggers with a lot more grip than if it was a single socket. Trying to remove the modules by hand when you can't get a good grip on them or prying too much at one side will likely result in bent pins. To safely remove, use leverage to your advantage..

Find a mechanical pencil, BIC pen or something plastic that won't mar the board (ie. don't use a flat-head screwdriver) and gently work it under the center of the nvram between U8 and U13 sockets. Work each side, back-and-forth, until the nvram is freed. You'll have far better control with leverage and working each side like this, than attempting to yank the nvram out of the sockets with your hands.

I went a different route that I never fully explained with the "original" Pinitech MPU200 NVRAM. Purposefully designed slightly larger to allow you to easily get a grip on the nvram and gently lift at opposing corners. You can actually grab the whole thing and rock it back and forth slightly side-to-side to free it. Just that extra bit of PCB gives some leverage and makes it easier to remove by-hand.

Enough people seem to use these things for testing purposes, so it's worth mentioning how to get the modules safely out without damaging the nvram or MPU. Amazing the force that it takes to remove something from two sockets versus just one. Use leverage & you'll be just fine! =)

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