As per title, anyone knows the specs of the on-board RAM chips used on GVP G-Force 030 (for A2000) and if the chip type is SOIC or PLCC? And where to order it from (was thinking Digikey). Thanks!
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What RAM chips does the GVP G-Force 030 use?
- Thread starter tbtorro
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The ones in the top of this picture?
http://www.bigbookofamigahardware.com/bboah/media/download_photos/gforce030_6_big.jpg
According to this guide, it has the following specs:
SRAM, 5V, 1Mbit x 4, Fast Page, SOJ, 60ns.
SOJ looks similar to PLCC, however it only has pins on two sides, not all four.
http://www.bigbookofamigahardware.com/bboah/media/download_photos/gforce030_6_big.jpg
According to this guide, it has the following specs:
SRAM, 5V, 1Mbit x 4, Fast Page, SOJ, 60ns.
SOJ looks similar to PLCC, however it only has pins on two sides, not all four.
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Thanks for the correction D. - of course I knew it was SOJ and not PLCC - was just testing the experts..
lol:
Not sure EDO would work if the original chips are FPM.
Anyway it would be very easy to rob those chips using a hot air rework station, so you need to get one of those, tbtorro.
Not sure EDO would work if the original chips are FPM.
Anyway it would be very easy to rob those chips using a hot air rework station, so you need to get one of those, tbtorro.
it'll work mate.
Not sure EDO would work if the original chips are FPM.
Anyway it would be very easy to rob those chips using a hot air rework station, so you need to get one of those, tbtorro.
it'll work mate.
Ohh - I haven't thought of that, I have like a kilo of those.. That's a great idea..
Maybe I could just socket them to be sure - SOJ sockets should exists - didn't the old S3 Virge cards had those? Perhaps these would do? http://www.ebay.com/itm/SMD-SOJ-28-...al_Components_Supplies_ET&hash=item3f3232fd1fBut how to solder them, I don't see any legs sticking out? I'm guessing maybe hot air, but will the plastic survive?
---------- Post added at 16:17 ---------- Previous post was at 16:14 ----------
Anyway it would be very easy to rob those chips using a hot air rework station, so you need to get one of those, tbtorro.
I have one already..
Remember I have almost everything..
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They might be the right ones, although the 4 middle pins in each side are not used. They can be soldered using a fine tip on the soldering iron and a steady hand. The bottom has holes in it so you can get to the pins:
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yep,could use a bit of kapton tape to hold the socket down so both hands are free.
and a very fine solder tip,1mm pointed or less?
I was also wondering if anyone knows if the first SIMM socket is electrically equivalent to the SOJ pads (maybe I could measure them) as I've seen the first socket is missing on cards that have the chips.
And if that assumption is correct then the RAM should just work after soldering it without any other modification on the card, right?
And if that assumption is correct then the RAM should just work after soldering it without any other modification on the card, right?
yep,it does look that way. i can see some of the traces and banks arnt normally in odd numbers.
so,it looks like one or the other either ic's or simm socket.not both.
but im not sure,someone will tell you im sure when they see this.
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I recommend to forget using sockets on this because there is quite big SMD capacitor under the original chips and because the pads are too much offset. Please see more info here and comment if you have something to add: https://www.amibay.com/showthread.php?23053-Gvp-030-combo-card-memory-mod&p=769269
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