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Super Magic Drive 32mb Upgrade Video Tutorial

 
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jimiii



Joined: 19 Jan 2011
Posts: 5

PostPosted: Wed Aug 14, 2013 8:05 pm    Post subject: Super Magic Drive 32mb Upgrade Video Tutorial Reply with quote

Hello, i'm gonna make a video tutorial on how to do this, it will also include how to change the battery, clean the corrosion, and how to install and use ucon64

So the first thing i was shure about was that i just needed to find a 72 pin simm board and desolder the 20 pin SOJ 514400 1Mx4 DRAMs and use them and be done, they look like this and are verry easy to find,
http://www.videogameobsession.com/videogame/hk/SMD/SMD800%20Copier-05.jpg
tototek also used to sell them i think and this guy seems to have done that successfully
http://www.cherryroms.co.uk/forums/copier-and-hardware-forum/super-magic-drive-24m-32m-upgrade.html

the only problem is that my 24m SMD uses 28 pin dram's..

and so does this (this is exactly how my board looks like minus the two extra dram's)
http://imageshack.us/photo/my-images/130/smd32mbmotherboard.jpg/

and this (notice the rearanged and extra ceramic 104 capacitors + the blue ones?) maybe not needed but for more stable dram usage right?
http://www.tototek.com/phpBB2/files/p1010001_199.jpg
that one also has this for some reason? looks to be from epld to something, can't look right now
http://www.tototek.com/phpBB2/files/p1010004_170.jpg

so can we clear this up before the noble art of upgrading the smd-800 gets forgotten?
extra capacitors needed? what does the wire do?
where the hell do you find 28 pin 1Mx4 DRAMs? is that even what they are, when i searched for the partnumber a retailer had these keywords underneath
IC,DRAM,FAST PAGE,512KX8,CMOS,SOJ,28PIN,PLASTIC

partnumber beeing km48c512j-7 by samsung
sorry for my english but i want to know what i'm doing before i do anything

btw the cherryroms guy said "The chips I got from Tototek are a bit bigger and the legs of the ICs are curled underneath it so it's a bitch to solder"

makes me think he used something like this
http://www.ebay.com/itm/ISSI-IS41C85125-60K-DYNAMIC-RAM-SOJ-SMT-IC-New-/260752111871?pt=LH_DefaultDomain_0&hash=item3cb60978ff
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Mystic_Merlin



Joined: 15 Oct 2007
Posts: 395
Location: Bangkok

PostPosted: Fri Aug 16, 2013 9:47 am    Post subject: Reply with quote

Hi,

What you're looking for are 512K X 8bit FPM ICs.

All the copiers are using different kinds of ram boards, mostly with 4 bit ICs and some 8 Bit.
Usually 4bit SOJ ICs have a "gap" between their legs (no pun intended Wink)

In the 1990's price could vary depending on the type of memory and package, so manufacturers were usually designing PCBs allowing 1 or 2 types of memory packages to be used, sometimes even adding some demux and custom logic.

For instance my 8M SMD uses 8 x 256K x 4 bit ICs

Configurations for ramboards can be as follow (max nb of ICs):
- 512Kx4b( x4 ) = 8M
- 1Mx4b( x8 ) = 32M
- 1Mx8b( x8 ) = 32M
- 2Mx8b( x2 ) = 32M
- 2Mx8b( x4 ) = 64M
- 2Mx8b( x8 ) = 128M
- 4Mx4b( x4 ) = 64M
- 4Mx4b( x8 ) = 128M

You can find 512K x 8bit ICs on 72 pins PC SIMM but they're less common
I recently got a 4MBx4 Siemens board with those ICs:
http://pdf1.alldatasheet.com/datasheet-pdf/view/45229/SIEMENS/HYB5117800BSJ-50.html
As you can see on this DPF board you can use both 8bit and 4bit packages type


You can also have a look at a copier I upgraded to 64M here:
http://www.tototek.com/phpBB2/viewtopic.php?t=4351

As for your questions regarding the flitering caps: I believe they are recommended in the datasheet but not mandatory.
Concerning the wire, it could be needed for a specific board revision, if yours don't have it then don't bother.
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jimiii



Joined: 19 Jan 2011
Posts: 5

PostPosted: Sat Aug 17, 2013 3:05 am    Post subject: Reply with quote

Thank's for the info! I feel almost comfortable enough to do this now Smile i've gone through the entire no-intro set up to date, 1 rom from each parent, so i have a complete smd800 24M compatability list, or uncompatible rather, i'll post it soon, probably almost the same as the everdrive
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wallacefung



Joined: 13 Mar 2019
Posts: 3

PostPosted: Fri Mar 15, 2019 5:32 am    Post subject: Reply with quote

Luckily, you've got the board with SOJ24 and SOJ28 ram, so you can get a try for 4M x 4bit ram.

I have a UFO hyper 6 with ram board only support SOJ20 ram.
So I can replace ram with 1M x 4bit for max.
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ackman



Joined: 01 Mar 2019
Posts: 4

PostPosted: Thu Mar 21, 2019 4:33 pm    Post subject: Reply with quote

Iím eager to see the video!

Just ordered some ICs from ebay to upgrade my Double Pro Fighter to 32 Mb.

Thank you!
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