Hi Guys,

Im new to the Vb scene and the first thing i want to do is make me a socket cart for this awesome lil thing. Ive made plenty for the nes & snes before but im really scratching my head at the diagram i found from http://www.goliathindustries.com/vb/VBCart.html. Would somembody care to explain it to me or post a better one???

Whats most confusing is the the edge connector and the directions for the left side of the eproms(2nd one numbers match up but on the first??)

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I don’t know if this helps but here’s a Virtual Boy pinout from:

http://consolingmyself.co.uk/post/732430949/retrode-virtual-boy-adapter-build-3#disqus_thread

---------------------------------------
Sega Edge       Signal          VB Edge
---------------------------------------
A1              gnd             1, 2
A2              +5v             54
A3              a8              15
A4              a11             22
A5              a7              17
A6              a12             24
A7              a6              19
A8              a13             26
A9              a5              21
A10             a14             28
A11             a4              23
A12             a15             30
A13             a3              25
A14             a16             32
A15             a2              27
A16             a17             34
A17             a1              29
A18             gnd             33
A19             d7              38
A20             d0              39
A21             d8              37
A22             d6              42
A23             d1              43
A24             d9              41
A25             d5              46
A26             d2              47
A27             d10             45
A28             d4              50
A29             d3              51
A30             d11             49
A31             +5v             36, 53
A32             gnd             59, 60
B1              N/A             -
B2              N/A             -
B3              N/A             -
B4              a9              18
B5              a10             20
B6              a18             13
B7              a19             11
B8              a20             16
B9              a21             -
B10             a22             -
B11             a23             -
B12             N/A             -
B13             N/A             -
B14             N/A             -
B15             N/A             -
B16     /C_OE (Output Enable)   35
B17     /C_CE (Chip Enable)     31
B18             N/A             -
B19             N/A             -
B20             N/A             -
B21             N/A             -
B22             d15             40
B23             d14             44
B24             d13             48
B25             d12             52
B26             N/A             -
B27             N/A             -
B28     /LDSW (not used)        -
B29     /UDSW (not used)        -
B30             N/A             -
B31             N/A             -
B32     /CART_IN (not used)     -
---------------------------------------

dasi wrote:
Virtual Boy pinout from:

http://consolingmyself.co.uk/post/732430949/retrode-virtual-boy-adapter-build-3#disqus_thread

---------------------------------------
Sega Edge       Signal          VB Edge
---------------------------------------
A1              gnd             1, 2
A2              +5v             54
A3              a8              15
A4              a11             22
A5              a7              17
A6              a12             24
A7              a6              19
A8              a13             26
A9              a5              21
A10             a14             28
A11             a4              23
A12             a15             30
A13             a3              25
A14             a16             32
A15             a2              27
A16             a17             34
A17             a1              29
A18             gnd             33
A19             d7              38
A20             d0              39
A21             d8              37
A22             d6              42
A23             d1              43
A24             d9              41
A25             d5              46
A26             d2              47
A27             d10             45
A28             d4              50
A29             d3              51
A30             d11             49
A31             +5v             36, 53
A32             gnd             59, 60
B1              N/A             -
B2              N/A             -
B3              N/A             -
B4              a9              18
B5              a10             20
B6              a18             13
B7              a19             11
B8              a20             16
B9              a21             -
B10             a22             -
B11             a23             -
B12             N/A             -
B13             N/A             -
B14             N/A             -
B15             N/A             -
B16     /C_OE (Output Enable)   35
B17     /C_CE (Chip Enable)     31
B18             N/A             -
B19             N/A             -
B20             N/A             -
B21             N/A             -
B22             d15             40
B23             d14             44
B24             d13             48
B25             d12             52
B26             N/A             -
B27             N/A             -
B28     /LDSW (not used)        -
B29     /UDSW (not used)        -
B30             N/A             -
B31             N/A             -
B32     /CART_IN (not used)     -
---------------------------------------

Thanks, that does clear it up a bit. Its late where i am so il print all that off and get cracking tommorow. Il be sure to post some pics if it turns out how im hoping.

I’m not sure I understand what you’re asking… but if by numbers matching up, you mean why D0-D7 are connected to D0-D7 on one, and D8-D15 on the other, that’s because the VB has a 16-bit wide bus, but the EPROMs the diagram is describing are 8-bit wide. So you’re using two EPROMs to make the 16-bit wide bus.

I dunno if this helps, but I’ve got some info on my site. Cart pinout – http://www.projectvb.com/tech/cartpinout.html , and various step-by-step cart builds – http://www.projectvb.com/progcart.html .

DogP

Ok, i think i was looking at it the wrong way. So is it pin 13 on the first eprom that connects to pin 39 on the edge connector for example?

16bitz wrote:
Ok, i think i was looking at it the wrong way. So is it pin 13 on the first eprom that connects to pin 39 on the edge connector for example?

You’re right: low bits go to low bits. But, they’re not “first” and “second” *PROMs, they’re “odd” and “even” *PROMs. One holds all the bytes at odd addresses, and the other holds the bytes at even addresses.

Ok! done with the socket part of things. Now im gonna take a break while i think of the best way to attach it to the actual cart and then start wiring to the pcb.

Also, another question, im using teleroboxer for my doner so i can save so is there anything i need to connect to the ram? also DogP do i need that other thing thats soldered onto your testboard?

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16bitz wrote:
Also, another question, im using teleroboxer for my doner so i can save so is there anything i need to connect to the ram? also DogP do i need that other thing thats soldered onto your testboard?

You don’t need to do anything to use the RAM… it’ll just work. And if you’re talking about the jumper blocks on my EPROM cart… no, you don’t need them. I think they were so I could switch between using EPROMs and Flash.

DogP