DaynaPort E/SI30 Coaxial to RJ45?

[j2theLj]

I recently got hold of a DaynaPort E/SI30 card to use in my Macintosh SE/30. As seen in the picture, the coaxial side is populated but not the RJ45 side.

Are there any good adapters to connect RJ45 cables for networking to the coaxial connector?

I guess populating the RJ45 side of the card is an alternative, but there are quite a few components in that case, not just the connector.

 

[cheesestraws]

That 15 pin port is an AUI port. The name of what you want is a 10BaseT AUI transceiver. They're fairly readily available.

You can get a media converter for the 10Base2/coax port, but it'll be harder to find, more expensive, and physically more cumbersome.

 

[j2theLj]

Ok, thanks - I have a bunch of M0437 AAUI transceivers, is it only the connector that is different or are there other differences that would prevent them from working with this?

 

[cheesestraws]

AAUI is electrically very very close (it doesn't provide 12v, which real AUI does), but an adapter from AAUI to AUI is going to be enormously more expensive than just getting an AUI dongle.

 

[Daniël]

The breakout board at the back is effectively just an AUI transceiver with a passthrough.

If you have access to more of such breakout boards, or can get them for not too much money, you could potentially save yourself having to have a bulky AUI adapter permanently plugged in. From my (very preliminary) findings, it seems like there was somewhat of a "standard" pinout for these.

I bought a Novell/Shiva SE NIC missing its breakout board here a while ago, and intended to modify a spare DaynaPORT RJ45 breakout board to work with it (I got two with one SE/30 DaynaPORT NIC), only to find out their pinout for the ribbon cable was 100% identical and plug 'n play. Works great. Of course, do check before plugging things in, because this is not guaranteed.

The datasheet for the Ethernet controller on the NIC and the RJ45 transceiver on the breakout board, and a pinout of where power and ground connections are on the pinheader connectors, should be enough to figure it out.

 

[cheesestraws]

What @Daniël says is also true. Depends how much effort you're willing to put in, really .

 

[j2theLj]

thanks @cheesestraws and @Daniël, I’ll be on the lookout for an AUI dongle or an additional breakout board - worst case scenario I’ll try to make an AAUI to AUI adapter myself.

 

[protestContest]

The datasheet for the Ethernet controller on the NIC and the RJ45 transceiver on the breakout board, and a pinout of where power and ground connections are on the pinheader connectors, should be enough to figure it out.

@Daniël do you happen to have the ribbon cable pinout for your NIC on hand? I just got a Daynaport E/30 without the breakout board, and I think I'll have to build one myself.

 

[j2theLj]

@Daniël do you happen to have the ribbon cable pinout for your NIC on hand? I just got a Daynaport E/30 without the breakout board, and I think I'll have to build one myself.

Unfortunately I don’t, hope you can find it!

 

[Lopan]

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I just got my se/30 working with this. funny thing is I used to have 50 of these and got rid of them

 

[cheesestraws]

That’s the same one that I use, too

 

[j2theLj]

I found one just like it too and it works great.

 

[protestContest]

@Daniël do you happen to have the ribbon cable pinout for your NIC on hand? I just got a Daynaport E/30 without the breakout board, and I think I'll have to build one myself.

Just in case anyone else is missing the daughter board to a Daynaport E/30 (or another board with a compatible ribbon cable, as Daniël mentions), I ended up tracing the pinout for the ribbon cable based on the datasheet for the SONIC chip. I'm not 100% on the +/- polarity for the pairs. Now I just need to make an adapter to plug it into a transceiver module.

Pins 1, 2, 14, 15, 16: +12V
Pins 3, 5, 7, 10, 12: Ground
Pin 4: TX+
Pin 13: TX-
Pin 6: RX-
Pin 11: RX+
Pin 8: CD+
Pin 9: CD-