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Don't know the switchover date, but by introduction of the 6360/6400/5400 Alchemy generation the backplane opening had been switched over to PCI card support as in the DOS version pic @phipli posted above. That makes it easy to spot late production boards, even in external only pics on eBay...

Installation of headers should be a snap when the connector can be used as an assembly jig. That's what I was thinking in scaling the graphic, only the horizontal spacing would be a given? Then we should be looking into machine pin headers with their round pins I'd think?

Has anyone put calipers on the pins of the OEM cable? Wondering about the proper diameter?

Looks great, considering my current skills with the iron I can't comment any other way. I'd be using wire wrap headers for prototyping, but I'm a lurking mososaur. 🤫 You set the pins into the connector as a jig for soldering them, no? You can file down the sides of the packs to fit all five...

Thinking my AI playtime input has about run its course here, I'll finalize the graphic and sit back to enjoy the show. ;)

Don't think a DA-15 version of my bodge would be worth the effort. Very few to none would be interested in it to be worth the effort. There are pricey OEM cables available for purists with Apple monitors in need of one available. I wouldn't want to see a VGA adapter hanging off the case in any...

Good suggestion, wondered if having n.c. pins installed to flesh out the interface might be problematic for any reason? I'm amazed at the lack of non-signal specific grounding pins! Was also wondering if adding a "shroud/surround" to the printed case bottom might be useful for alignment? It...

Below is a two-fer solution, 6100/7100. Yeah, not sure I'd worry about the 8100, did any config ship w/o either A/V or HPV cards installed? When I misquoted the Sundance Kid about the amount of DS tape on the right angled VGA Cable contraption cases' backside, figured I could go back to my...

Got enough tape there Butch? :) edit: tired, lost the detailing of the pins/PCB exposed in profile of the case bottom.

Everything is mounted on the backside of the case. Working up plans for the case currently. It's a form fitting underlayment/chasssis to be securely double faced taped to the backside of 6100. PCB will screw down to the base or it'll just slip over pins and be held in place by the top so it cam...

@wottle I looked at prices on eBay for Apple's cables, OMG! Beginning to thinking this notion for external, no board rework or case mod required kluge might make a viable product for someone here? License for commercial use available in trade for PCB design of TwinSlot PCI adapters. ;)

Been looking at this design for flaws. Short "throw" of logic board installation is my main concern. It's tight, but probably long enough front to back for careful installation with adapter installed using double sided tape. Velcro might be a better option? How long are the pins on Apple's...

External 6100 Adapter has VGA port pointed across the back of the case so Cable is attached for strain relief. (Hot Glue?) No board or case mods necessary. B.O.M. PCB headers (on PCB which insert into HD45) HD-15 PCB mount, soldertail connector Double Face Tape (affixes unit to back of case)...

Spent way too much time playing in Illustrator only to come up with not quite to scale art: Mounting holes for the VGA Connector are a bit closer to the witness lines for mounting tabs which should touch the sides of the connector. There's no way to Still convinced a simple exterior adapter...

I wish someone would sell some flashed ROM replacements? I've got the hot air rework side of things but not the EEPROM reflashing setup. Very interested in your project, especially so since it's targeted for OS9. Ran my QS for many years to run my considerable Graphics/CAD/CAM suite. Had it on...

LOL! :D I do that too. But something that really holds its shape for Mk.1 eyeball assessment of the bends/shapes on the solder side of the board will be helpful. Cardboard's definitely easier to fab the holes for test fitment of the actual connector in the same config. Make up a cardboard...

Great, glad I could get it straightened out for you. @wottle thanks for that info. Yep, not being on the same page in terms of dimensions is problematic. Cardboard is a great idea, that's how I make prototypes for my riser projects, but they're flat, no bends. There's a better approach for...

inside to inside measurement of the bracket is more like 28.mm, not 35mm. At its widest point at the front, where the edges of the sides are stamped outward from what the sides of your bracket would be, it's only about 30.8mm outside to outside. Deleted/reposting pic from above for rough...

Thanks for the graphic! Center to center isn't the concern, width of the holes from outside edge to outside edge relative to inside to inside edge of your part is the issue. I'll do an AI session tonight. ;)

Sorry about that, I have trouble using language to describe things. Visual thinking has its drawbacks. I'll do a graphic later tonight or tomorrow. Just put a caliper on the parts. the circles on your diagram need to be set apart about 29.12mm, outside edge to outside edge. The inside...