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cartridge case

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#1 willbilly OFFLINE  

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Posted Sat Feb 10, 2018 8:56 PM

Hi all

 

So, this is my first post.  I recently got my TI-99/4a from my dad, who recovered it from the attic over Christmas.  It was my first computer, and even though I didn't really appreciate it then (be easy on me, I was 4), I'm falling in love with it now.

 

I've been lurking, reading all the really cool stuff that everyone's been doing, like Erik's FPGA, Jon's carts and such, and I decided that maybe I could do something with my skills as an industrial designer and machinist.

 

So I whipped up this in my CAD program and I've ordered two prototypes to be printed.  Hopefully they'll snap right together.  The printing's a bit on the expensive side, so it might not be a great candidate for large number of carts, but I have always been interested in mold making...;P

 

Enjoy,

Will B.

Attached Files



#2 SignGuy81 OFFLINE  

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Posted Sat Feb 10, 2018 9:14 PM

Looks nice.  Are you going to provide the files?



#3 willbilly OFFLINE  

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Posted Sat Feb 10, 2018 9:37 PM

Looks nice.  Are you going to provide the files?

 

Sure!  Here are the STLs as they stand.  Of course, no guarantees, I haven't tested these guys yet.

 

Also, it doesn't include the sprung door yet either.

 

Attached File  ti994a_cart.zip   52.13KB   13 downloads


Edited by willbilly, Sat Feb 10, 2018 9:38 PM.


#4 Opry99er OFFLINE  

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Posted Sat Feb 10, 2018 9:57 PM

Hey, welcome to the group, brother!!! Glad to have you here!

#5 Ksarul ONLINE  

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Posted Sun Feb 11, 2018 12:29 PM

New cases are definitely a good thing. We have a couple of candidate types out there (Jon did some nice STL files for a three-screw case, I have soft molds for a TI case, and I know there are a few designs out there for the FLASHROM and FlashGROM boards).

 

Welcome to the group!



#6 Opry99er OFFLINE  

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Posted Sun Feb 11, 2018 1:24 PM

If you get a moment, check out the Funware cartridge case. It has a slightly higher profile, which could be useful on future projects, or for stacking RAM IC chips when making Super Carts, etc.

Sometimes that 1/8 inch to 1/4 inch of head room is all that is needed to push a project over the top.

I also very much love the Navarone cartridge shell. It could also be potentially useful in the future, as it has a considerably longer footprint.

:)

#7 willbilly OFFLINE  

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Posted Sun Feb 11, 2018 4:12 PM

Cool! Thanks Opry, I'll check those out. Now that I've figured out the critical dimensions (well, I mean I have the first draft of them) I can iterate them fairly fast.

I actually didn't realize there were already so many options. For my next project I'll try to do more research to make sure what I do is a little more helpful for the community.

#8 Opry99er OFFLINE  

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Posted Sun Feb 11, 2018 4:18 PM

What youve got there is superb. :)

I only suggested the others because they are scarce, and the TI-style ones are not so.

I hope you stick around and share your talents with us. With new hardware projects on the horizon, it is always good to have folks who deal in the *real* world (as in NOT software).

Thanks again for your efforts!

#9 Ksarul ONLINE  

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Posted Sun Feb 11, 2018 4:38 PM

Please do continue--any additional bit is very useful. @Opry99er is also right in that a slightly taller cartridge case has some advantages, especially if it has the footprint of the ROMOX (and early Navarone) cases. A ROMOX case that is as tall as a TI/Funware case all the way to the front of the case would be extremely useful for some expanded cartridge board designs.



#10 Casey OFFLINE  

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Posted Sun Feb 11, 2018 5:38 PM

Welcome to the group!  I like where this is going.  There are some things I'd like to see created for the 99/4A that I just don't have the knowledge or talent to produce.  I'm still dreaming of beige sidecar style cases for things that were never released as such, though the sidecars were made in a very small quantity.  Perhaps if there are enough of us interested in such a thing we can all chip in for it.  In any event, welcome!  We are happy to have you here.



#11 willbilly OFFLINE  

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Posted Sun Feb 11, 2018 6:02 PM

Welcome to the group!  I like where this is going.  There are some things I'd like to see created for the 99/4A that I just don't have the knowledge or talent to produce.  I'm still dreaming of beige sidecar style cases for things that were never released as such, though the sidecars were made in a very small quantity.  Perhaps if there are enough of us interested in such a thing we can all chip in for it.  In any event, welcome!  We are happy to have you here.

 

One of the ideas I had reading these discussions was a sidecar made for super catridges like Miner 2049er.

 

Anyway, here's a quickie Ten-Gallon Cart design... 5/8" longer and 1/8" taller.  I haven't messed with the internals to hold it the pcb correctly yet though.

 

I do like the Romox look.  Very Blade Runner-esque.  I'll probably incorporate some of that into a final Jumbo Cart design.

Attached Files



#12 Casey OFFLINE  

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Posted Sun Feb 11, 2018 6:10 PM

This is my dream item:

 

https://aug.99er.net...ti998se8[1].jpg

 

I'd like to implant a speech synthesizer into a case like this so that it matches my beige console.  Clearly only a cosmetic pipe dream at this point, but a guy can wish, right? :)



#13 --- Ω --- OFFLINE  

--- Ω ---

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Posted Sun Feb 11, 2018 6:14 PM

WELCOME ABOARD!  :)

 

If you want a future project, I'd recommend keeping a close eye on the TIPI project.  I think a case will be in great demand and for more than just a few cases.  In the current configuration, it looks like a case will need to enclose the 32K sidecar, the TIPI interface AND an Rpi Zero.  Having some design style to go with it would be quite welcome.



#14 willbilly OFFLINE  

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Posted Sat Feb 17, 2018 3:39 PM

Hi guys,

 

Unfortunately, thanks to Presidents' Day, I won't be getting the prints until Tuesday.

 

So I was brainstorming during my drive to work, and I started thinking about standards.  Is there a standard for the sizes of homebrew cartridges?

 

I have the dimensions from my TI cartridge.  I haven't cracked open my Atari made cartridges, but since they're smaller, I don't see the point.

 

If there isn't a standard set of sizes, should we try defining one?

 

I had some rough ideas of how it might look...

 

1X = Fits a standard TI PCB (roughly 1 15/16" length and 4" width, not including connector)

1.5X = 1.5 times standard in length (so that'd be ~3" length and 4" width, since that dimension is maxed out)

2X = 4" x 4" in the same standard

 

And then a suffix could be added for alternate heights, maybe...

 

250 (1/4" above PCB...standard clearance)

500 (1/2" clearance)

750 (3/4")

 

So, I could design a case top that fits 2X750 PCBs, and you know exactly what you can jam in there.

 

So...whaddya think?



#15 Opry99er OFFLINE  

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Posted Sat Feb 17, 2018 4:03 PM

Yup

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#16 Ksarul ONLINE  

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Posted Sat Feb 17, 2018 4:44 PM

You are spot-on when it comes to case ideas! You can also make the bottom piece standard for all cartridge heights of the same length in the slot. That makes it easy to mix-and match heights as needed.



#17 Opry99er OFFLINE  

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Posted Sat Feb 17, 2018 4:47 PM

So cool... I wish I could contribute in some way!! Love your ideas!

#18 willbilly OFFLINE  

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Posted Tue Feb 20, 2018 9:11 PM

It needs a little adjustment but for a first try it isn't half bad! I usually need to do one or two more prototypes but I think I'll have it nailed next revision.

Attached Files



#19 Opry99er OFFLINE  

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Posted Tue Feb 20, 2018 9:21 PM

Mighty fine craftsmanship!!!

#20 retroclouds OFFLINE  

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Posted Tue Feb 20, 2018 11:12 PM

That is so nice! I love the white colour!

#21 Vorticon OFFLINE  

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Posted Wed Feb 21, 2018 12:24 AM

Please post the updated stl files when you are done with the modifications. I'd like to 3D print one. This is great!

#22 willbilly OFFLINE  

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Posted Sun Mar 4, 2018 1:58 PM

Hey folks, sorry for going dark.  Got married last week. :)

 

Here's some renderings of a 2X bottom shell.  One has the 2X PCB in it, the other the 1x.

 

It has optional stands for different length cart pcbs.  You can see it in grey at the 1.5X position in the 1X PCB pic.  I figure you can glue it in.  Maybe I'll figure out a way to get it to snap together instead, just for added coolness.

 

 

Attached Files



#23 Opry99er OFFLINE  

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Posted Sun Mar 4, 2018 2:23 PM

You could fit a nanoPEB in one of those!!! :)

#24 slinkeey OFFLINE  

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Posted Sun Mar 4, 2018 3:59 PM

Got married last week. :)

 

Hey, congrats man.  



#25 acadiel OFFLINE  

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Posted Sun Mar 4, 2018 4:45 PM

Hi all

 

So, this is my first post.  I recently got my TI-99/4a from my dad, who recovered it from the attic over Christmas.  It was my first computer, and even though I didn't really appreciate it then (be easy on me, I was 4), I'm falling in love with it now.

 

I've been lurking, reading all the really cool stuff that everyone's been doing, like Erik's FPGA, Jon's carts and such, and I decided that maybe I could do something with my skills as an industrial designer and machinist.

 

So I whipped up this in my CAD program and I've ordered two prototypes to be printed.  Hopefully they'll snap right together.  The printing's a bit on the expensive side, so it might not be a great candidate for large number of carts, but I have always been interested in mold making...;P

 

Enjoy,

Will B.

 

Awesome!  This looks amazing!

 

I have the inventor files for my cartridge shell attached that I put up on Thingiverse if you want them as well.  Feel free to do whatever you want with them, as long as there's attribution.  Ksarul had some enhancements he wanted fixed on it (mostly thickness), but it also needs to be resaved in metric.  I just need to see if my license for Inventor is still good or not; I don't have it installed on my new Thinkpad.

Attached Files







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