68kMLA Classic Interface

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840av ROM chip?

Posted by: zackl on 2013-07-28 13:35:58 I am cobbling together an 840av from parts found here and there (thank you LuckyBob for his case / power supply etc!) and managed to track down a motherboard on EBAY. It was sold in "working condition" but there is a good amount of cap goo on the board and I noticed that it has a slot I hadn't seen before on the 840av motherboard - image attached - is this the infamous ROM slot from the early boards?

Posted by: dougg3 on 2013-07-28 14:04:36 I know we already talked on PM and you've already seen my post, but just wanted to post this here for future reference. I happened upon the ROM SIMM you're looking for on eBay and posted about it here. That socket you have circled is indeed the ROM SIMM socket, and I believe the unpopulated pads for the two chips below it are where the motherboard ROM would have gone. I'm just going to save some of the determined pinouts and sizes/shapes from the SIMM for future reference and then I'd be thrilled to send it to a good home where it will be used! 🙂

Posted by: zackl on 2013-07-28 14:15:16 That's awesome - thank you so much for taking good care of it! I'll report back to forum if this brings the 840 to life again! - Z

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