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What actually is an Atari SIO connector, if I wanted to order the part? I have tried Farnell for DB13, Dsub 13 etc but no joy. I am assembling a SIO2ST for an 800XL.

Cable

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Without a picture or drawing you're not likely to get a answer. – Olin Lathrop Sep 8 '12 at 12:33
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Ordering? This looks like a custom designed connector for a computer that went out of production 30 years ago. Unlikely that anybody still makes those. I suggest you contact an Atari user group, which may have spare parts from cannibalized computers. – stevenvh Sep 8 '12 at 13:34
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DB9 and DB15 are old but they're still used today: the video in the PC I bought this week has a DB15 connector next to the DVI. The one on the photo is not a DB13. Olin was probably mislead by the simplified drawing which just shows the staggered pinout. On the photo it doesn't look anything like a DB. – stevenvh Sep 8 '12 at 14:41
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I wonder about whipping the socket out of the 800XL and soldering a DB15 in its place. Might need to modify the case a bit I suppose. But I don't even intend to connect a real Atari disk drive to this box. – Gaius Sep 8 '12 at 15:13
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Now that you finally show a picture, it is clear these are not "DB" connectors. I don't think I've ever seen anything quite like that before. – Olin Lathrop Sep 8 '12 at 21:31
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2 Answers

up vote 3 down vote accepted

I'm the owner of the site you linked to (SIO2ST schematic http://mixinc.net/atari/pinouts/stxl.htm ). This connector is indeed a proprietary one, only used on the Atari 8-Bit line of computers (400/800/XL/XE).

However these connectors are still available from a few sources (like BEST Electronics or B&C Computervision) many people choose to mount such an interface into the Atari itself and just connect the few wires to the internal side of the SIO chassis. You can use a DB9 chassis and make a hole exactly above the SIO chassis to fit the DB9. Wire it in a way so you can use a standard modem cable to make the connection between the Atari XL and Atari ST.

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up vote 1 down vote

It's proprietary.

You may have some luck via Best Electronics (apologies for the gaudiness of the linked site) since they seem to have tons of old Atari inventory.

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