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Are you using 6821s in place of the 6820s on the 560Z board, then? I hadn't confirmed that they'd work as replacements -- they usually do, I couldn't see why they wouldn't in this case, but I didn't want to order 100x 6821s just to find out they don't work here!

Beautiful, great work! Are you running 5.25" or 8" disks for OS-65D?

I'm in the process of getting bench space freed up for the Challenger III chassis. Currently have a number of other projects crowding both the main debug bench and the long bench I use for burn-in/also debugging.

I'm working on a S-100 chassis kit, built from just flat, square aluminum panels, and OpenStrut. Easy to make at home with a jigsaw and files, I'll probably offer a full kit as well.

Should be easy enough to build up a Challenger 2 style box, it'd be more rigid than the originals at least!

I use a number of suppliers, a few localish (within an hour or two drive), and of course I troll eBay as well.

Just picked up 300x 8T26 bus transceivers!

Well it looks like 8T95s are going to be easy this time -- one of my suppliers has 1800 of them in stock! I've just purchased all of them, so if anyone needs them for other projects let me know. They're 74LS365s which are direct interchange.

Oh good, for a minute I thought I had several hundred dollars of worthless boards due to some sort of screw-up

So I started building one of these up tonight...does this thing go in a Challenger II/III style chassis backwards -- with the components facing the rear panel of the system? I can't see how else it would go, unless I'm totally misreading the manual and the SYS bus goes to the Challenger backplane?

They're here! http://i.imgur.com/27MdXjT.jpg http://i.imgur.com/uOxxddU.jpg http://i.imgur.com/lH1x8Ml.jpg http://i.imgur.com/a58gGJp.jpg Side-by-side with the original from which it was copied: http://i.imgur.com/iAIR0KE.jpg Boards are decent quality. Not out of this world, but you sort of have to ...

Preorders are recorded. When the boards arrive and I'm satisfied that they're good to go, I'll email out payment instructions to everyone who preordered.

Ordered a bunch of 9x12" bubble mailers and "DO NOT BEND" stickers today -- expecting the boards in by the end of next week!