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Has anyone ever traced out the schematic for the Sega Card which drives the 3D glasses?

I found scans of the board on this thread http://www.smspower.org/forums/viewtopic.php?t=13935 but it's very hard to make out the connections on a black solder mask.

M33d.png (6.28 KB)

Attachment fairy

Awesome!

Looks like a charge pump operated on either nRD or nWR to generate a higher supply voltage for the comparator driving the 3D glasses, clever! In the XOR oscillator, C1 is marked as 100k? Clearly it has to be a capacitor else it wouldn't oscillate.

According to this picture http://www.retrosampling.se/Temp/Sega%203D%20Card.jpg the colour code for C1 is "red/red/orange/white" which would mean it's 22nF ±10% (22 x 1000) if I'm not mistaken.

On that scan C1, C2, C3, C8 and C9 all have the same value. None of those are on the schematic (except for C8, but it's marked as 2.2nF on the schematic), decoupling caps perhaps?

Looking at that scan, I wonder what the jumpers M3 and M4 do...

Sega 3D Card.jpg (2.2 MB)

Attachment fairy

db-electronics wrote

Looking at that scan, I wonder what the jumpers M3 and M4 do...

It changes where the pin 3 of 74HC259 (CARD Chip Select) connects to:

M3 closed it connects to /CE2 from the gate array (card slot pin 13)
M4 closed it connects to Z80 /MREQ (card slot pin 3)

Might assume that M3 means "SG-1000 MARK 3" and M4 means "SG-1000 Mark 4" (What we know as "Master System"...)

Any one able to confirm what the missing caps from the circuit diagram are for (C2, C3 and C9) and where they fit into the over all picture? Im guessing decoupling too.. but would like that confirmed. Here in New Zealand the 3d glasses were not that common and are quite hard to find, so checking against an actual unit is difficult. Ive not got one myself and am wondering about building one as part of another mod ive been working on. Cheers!

*digging out the thread* ^^

FYI: If you like to add 3D support to your Master System II you can use this PCB: OSHPARK.com or AISLER.net

Further informations can be found here: circuit-board.de (German forum)

Regards

PCBs.png (1.51 MB)

So wonderful Thomas, I just wanted to say thank you for your sharing your high-quality work!

You're welcome! :)

Well I can now confirm that this adapter board by segatom works in a game gear that has TV out options, either GGTV from viletim or using the RGB out found in LCD upgrades. I needed to modify mine to fit in this spot, but otherwise it's pin to pin compatible and works perfect.

IMG_20210404_232409.jpg (3.52 MB)

3D glasses game gear

Nice work, pal! :D

Author	Message
db-electronics Joined: 06 Dec 2013 Posts: 335 Location: Canada	Sega Card for 3D Glasses - Circuit Posted: Wed Feb 26, 2014 12:04 am
	Has anyone ever traced out the schematic for the Sega Card which drives the 3D glasses? I found scans of the board on this thread http://www.smspower.org/forums/viewtopic.php?t=13935 but it's very hard to make out the connections on a black solder mask.

kamillebidan Joined: 25 Feb 2013 Posts: 392 Location: Osaka	Posted: Wed Feb 26, 2014 4:37 am
	M33d.png (6.28 KB) Attachment fairy

db-electronics Joined: 06 Dec 2013 Posts: 335 Location: Canada	Posted: Wed Feb 26, 2014 2:11 pm
	Awesome! Looks like a charge pump operated on either nRD or nWR to generate a higher supply voltage for the comparator driving the 3D glasses, clever! In the XOR oscillator, C1 is marked as 100k? Clearly it has to be a capacitor else it wouldn't oscillate. According to this picture http://www.retrosampling.se/Temp/Sega%203D%20Card.jpg the colour code for C1 is "red/red/orange/white" which would mean it's 22nF ±10% (22 x 1000) if I'm not mistaken. On that scan C1, C2, C3, C8 and C9 all have the same value. None of those are on the schematic (except for C8, but it's marked as 2.2nF on the schematic), decoupling caps perhaps? Looking at that scan, I wonder what the jumpers M3 and M4 do... Sega 3D Card.jpg (2.2 MB) Attachment fairy

l_oliveira Joined: 29 Jan 2014 Posts: 95 Location: Brasilia, Brazil	Posted: Fri Mar 07, 2014 9:21 pm
	db-electronics wrote Looking at that scan, I wonder what the jumpers M3 and M4 do... It changes where the pin 3 of 74HC259 (CARD Chip Select) connects to: M3 closed it connects to /CE2 from the gate array (card slot pin 13) M4 closed it connects to Z80 /MREQ (card slot pin 3) Might assume that M3 means "SG-1000 MARK 3" and M4 means "SG-1000 Mark 4" (What we know as "Master System"...)

wasup Joined: 05 Nov 2014 Posts: 435 Location: Auckland - NZ	Posted: Wed Nov 05, 2014 9:09 am
	Any one able to confirm what the missing caps from the circuit diagram are for (C2, C3 and C9) and where they fit into the over all picture? Im guessing decoupling too.. but would like that confirmed. Here in New Zealand the 3d glasses were not that common and are quite hard to find, so checking against an actual unit is difficult. Ive not got one myself and am wondering about building one as part of another mod ive been working on. Cheers!

segatom Joined: 01 Aug 2013 Posts: 36	Posted: Tue Sep 04, 2018 7:35 pm Last edited by segatom on Mon Apr 05, 2021 4:36 pm; edited 1 time in total
segatom Joined: 01 Aug 2013 Posts: 36	digging out the thread ^^ FYI: If you like to add 3D support to your Master System II you can use this PCB: OSHPARK.com or AISLER.net Further informations can be found here: circuit-board.de (German forum) Regards PCBs.png (1.51 MB)

segasonicfan Joined: 05 Jan 2006 Posts: 422 Location: USA	Posted: Mon Dec 23, 2019 4:44 pm
	So wonderful Thomas, I just wanted to say thank you for your sharing your high-quality work!

segatom Joined: 01 Aug 2013 Posts: 36	Posted: Mon Dec 23, 2019 5:09 pm
segatom Joined: 01 Aug 2013 Posts: 36	You're welcome! :)

asdfqwer426 Joined: 22 Feb 2016 Posts: 37	Posted: Mon Apr 05, 2021 2:17 pm
asdfqwer426 Joined: 22 Feb 2016 Posts: 37	Well I can now confirm that this adapter board by segatom works in a game gear that has TV out options, either GGTV from viletim or using the RGB out found in LCD upgrades. I needed to modify mine to fit in this spot, but otherwise it's pin to pin compatible and works perfect. IMG_20210404_232409.jpg (3.52 MB) 3D glasses game gear

segatom Joined: 01 Aug 2013 Posts: 36	Posted: Mon Apr 05, 2021 3:50 pm
segatom Joined: 01 Aug 2013 Posts: 36	Nice work, pal! :D

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