ToToTEK.COM

[KanedaFr]

Hi all,

some times ago, one of my forum's members started a threah about the SMD.
Every member who still owned a SMD helped and we were able to compile a lot of informations.
These informations are available on a dedicated webpage

I post here because I know you guys know a lot of other things.
For exemple, this thread is very important but
- it doesn't explain how to identify a v1 from a v2 or a v3 SMD
- since cherryroms is dead (hélas), there is no more information about 32M upgrade
- reprogram the EPLD is impossible since we don't find a trace of the source (the hardware isn't a problem)

I also wasn't able to find someone with a genuine floppy drive.
Mine is broken so I'm unable to provide a valid pic of the PCB (not pretty sure to what the 7805's VIN is connected to...)
SpoonMan, I used one of your pic for illustration purpose. It links to your website but if it's not enought or want it to be removed, tell me.

SO, if you have any information and/or want to help, msg me

thanks

Kaneda

[Riko78]

great job !!!!!

I have a MDS 8mb, and I understand how to upgrade to 32mb ...

I understand it, the battery of SMD and so will ruin the motherboard? I recommend you open the Magid Drive and unsolder the battery?
I wonder if the Super Wildcard DX battery will have the same problems?

However, I am willing to give if you want more information on SMD.

thanks.

[KanedaFr]

Hi,

yes, if you never opened it, do it right now and check the battery!
if it's still here, check if it is corroded...if yes, remove it.
if not, keep it and check it time to time.
Of course, without it, you can't save game data (and so can't play RPG games!)

I'm working on a way to use a SRAM NV controller (with standard battery button) to resolve this.

Right now, I'm on the floppy drive...if you have it, I'm looking for a clean picture of the 7805 pins (back & front).

thanks

[madman]

I have an original SMD floppy drive, I can take a pic this week for you.

Also, in addition to offering the 32m upgrade, they did sell new 32m units as well, I happen to own one with the 32m sticker on the box. It's the only one I've ever really seen.

[Riko78]

madman have you other 32mb upgrade????

[KanedaFr]

cool! thanks madman!

I'm looking for better pics than these one:
http://img842.imageshack.us/img842/3073/p1060442r.jpg
http://img813.imageshack.us/img813/2517/p1060445.jpg
http://img577.imageshack.us/img577/7015/p1060446b.jpg
Like you can see, one of the 7805 pins isn't connected on my floppy PSU (which is a error) so I would to see a 'good' one


about the 32M, of course I'm interested in.
But I read you need to reprogram the EPLD so without the ELPD code, it's useless no ? and what bios version have you ? v4 I presume....

[madman]

I can't remember BIOS version, it came w/instructions showing v3.1, but it is obviously newer than that. Serial is A6309. Box shows A6308, but the unit and EPROM both have A6309. I'll try to dig it out this week and post pics/info.

[KanedaFr]

busy week end ?

[KanedaFr]

I got confirmation last week there is a very small trace which makes the connection between the 7805's VIn and the 12V output from the relay.
Mine was burnt by the awful fix of my SMD's previous owner.

Still looking for a picture to illustrate the fix on the SMD page but, at last, I'll be able to fix mine.

[Mystic_Merlin]

You could as well replace the whole PCB with a perfboard with DC input and a simple switch, using a +C- 5V/1A PSU. I did that once for a Supercom but it was a bit messy so I'll probably make a new one as I just brought back a boxed SMD from my trip in HK.

BTW my SMD is just a 8M version but luckily the memory board uses socketed DIP P21014. Any idea what's the equivalent for 2M (512,288x4) chip?

PS: Au fait très sympa ton site Kaneda

EDIT: just re-read 16M needed a MUX on early versions so just replacing the chips won't work...I think I have one of these boards somewhere but if anybody can provide a picture...

[KanedaFr]

Yeah, I know...
More exactly, you could make your own PSU using 5V + relay...
SMD switches the PSU "ON" using pin8 of the DB25
I made the schematic of the current PSU (with the help of CharlesMD), it is available on my blog. I need to add the DB25<->FDD connections before I add it to the dedicated SMD page.

About the memory board, we at least saw 4 of them:
tcdev's
Charles'
Koji's
mine

but, like you pointed out, I assume you need something special on some SMD versions...perhaps a newer version of EPLD program ?
I still don't know how to make the difference between the "3" versions of SMD
I know some of them miss a chrystal but don't know which one...

ps: merci, mais il date un peu...meme si je le mets de temps en temps a jour

[Mystic_Merlin]

Here's my SMD. The only differences I see are the missing resistance array near U6 and the chips' references have been erased.

Not sure if it's more or less common but as pictured on the box this one was sold by CCL and not FFE.

So far I successfully loaded roms via the comport. SMS roms converted with gg2md are not working though, it's freezing the copier.

The only weird issue I have is that the only way to bring back the SMD's menu screen is to switch off and on very quickly. Otherwise the SMD does not wipe out its memory, sometimes it reload the game with garbage data and if a cart is plugged in it can also load the cart directly bypassing the SMD's menu...

[KanedaFr]

wow! thanks for the pics!

so yours miss the RC circuit too...
Is it also a SMD 94V-0 PCB ? it's a shame they didn't change PCB ID each revision

since it's a CCL one, I assume it uses the v3 BIOS but coud you confirm ?

[Mystic_Merlin]

[KanedaFr]