Gary from OPA Posted August 27 Share Posted August 27 One question I have from the looks of it a regular original ti99 keyboard should work as well? I recently been donated a few spare original bare working keyboards for the ti99 by an former 9T9 User's Group member. So I was thinking I could use one of those until I build up the included new keyboard in the design or work on making an bigger keyboard with arrow and numerical keys. 3 Quote Link to comment Share on other sites More sharing options...
RickyDean Posted August 27 Share Posted August 27 12 minutes ago, Gary from OPA said: One question I have from the looks of it a regular original ti99 keyboard should work as well? I recently been donated a few spare original bare working keyboards for the ti99 by an former 9T9 User's Group member. So I was thinking I could use one of those until I build up the included new keyboard in the design or work on making an bigger keyboard with arrow and numerical keys. You could take that recent TI keyboard project and build on it, couldn't you? 2 Quote Link to comment Share on other sites More sharing options...
Gary from OPA Posted August 27 Share Posted August 27 (edited) 6 minutes ago, RickyDean said: You could take that recent TI keyboard project and build on it, couldn't you? Yes, you could use the teensy or another keyboard encoder like that used on 4a to use a generic USB keyboard instead. But still it's nice to have a direct input mechanical cherry keyboard with a custom layout so you can have dedicated ti99 keys without software encoding interface. USB keyboards can end up with timing issues in some games with the ti99 special split 2 player keyboard mode, since you have two users pressing and releasing keys at the same time. Edited August 27 by Gary from OPA 2 Quote Link to comment Share on other sites More sharing options...
RickyDean Posted August 27 Share Posted August 27 2 minutes ago, Gary from OPA said: Yes, you could use the teensy or another keyboard encoder like that used on 4a to use a generic USB keyboard instead. But still it's nice to have a direct input mechanical cherry keyboard with a custom layout so you can have dedicated ti99 keys without software encoding interface. USB keyboards can end up with timing issues in some games with the ti99 special split 2 player keyboard mode, since you have two users pressing and releasing keys at the same time. I'm meaning this one by our @visrealm, 2 Quote Link to comment Share on other sites More sharing options...
+OLD CS1 Posted August 27 Share Posted August 27 I think a project of this esteem demands an IR remote chicklet keyboard. 1 3 Quote Link to comment Share on other sites More sharing options...
Gary from OPA Posted August 27 Share Posted August 27 Just now, RickyDean said: I'm meaning this one by our @visrealm, Yes, I guess it could if you didn't want to use an original ti99 keyboard or build the one that was designed for the 99/22, all tho cost wise I think the new included design is cheaper to build as it uses standard key caps you don't have to do a bunch of 3d printing and then still strip parts of a original ti99 keyboard. 2 Quote Link to comment Share on other sites More sharing options...
Gary from OPA Posted August 27 Share Posted August 27 Just now, OLD CS1 said: I think a project of this esteem demands an IR remote chicklet keyboard. Haha.. nope we not going the spectrum way with their newest reproduction, unless we want to produce a /4 from 1978 which would be cheaper than buying one from eBay at 900 bucks. 3 Quote Link to comment Share on other sites More sharing options...
stevee671 Posted August 27 Author Share Posted August 27 Just in case... 5 Quote Link to comment Share on other sites More sharing options...
Gary from OPA Posted August 27 Share Posted August 27 1 hour ago, stevee671 said: Just in case... one question, what do you think is the best power supply to use for this device, I can't tell from the designer's photos what he is using. It was also mentioned that ATX power supply can work, what do you suggest could be useful, maybe one that could support more devices connected as well, like possible floppy or hard drives if we add on a small device to run those in the future or use the same power supply combined with the Shift-838 PEB backplane replacement board. 2 Quote Link to comment Share on other sites More sharing options...
nuxi Posted August 28 Share Posted August 28 Ohhhhh. I just noticed a fatal flaw in this design. With the expansion port in back, anybody rocking sidecars is going to have to buy a new desk 2 2 Quote Link to comment Share on other sites More sharing options...
Gary from OPA Posted August 28 Share Posted August 28 15 minutes ago, nuxi said: Ohhhhh. I just noticed a fatal flaw in this design. With the expansion port in back, anybody rocking sidecars is going to have to buy a new desk Well, hopefully most of us building one are power users with a PEB so having it in the back infact works out better instead on the side. In my case I would be using one of shift838 PEB joiner devices. 2 Quote Link to comment Share on other sites More sharing options...
+OLD CS1 Posted August 28 Share Posted August 28 39 minutes ago, nuxi said: Ohhhhh. I just noticed a fatal flaw in this design. With the expansion port in back, anybody rocking sidecars is going to have to buy a new desk @acadiel's 99/4 side car train will need a minor adjustment next year 1 5 Quote Link to comment Share on other sites More sharing options...
stevee671 Posted August 28 Author Share Posted August 28 Boards arrived! 10 2 Quote Link to comment Share on other sites More sharing options...
Gary from OPA Posted August 29 Share Posted August 29 19 hours ago, stevee671 said: Boards arrived! They is great. Please let me know when the second batch is going to be run, don't want to miss it. Second, did the designer detail how the 32k/16bit is setup, normally when you use two 32k chips you end up with extra 32k. But, I don't see off hand what he is using for the 8300 scratchpad area, so just wondering how he partition the ram or dud something with the leftover space or did he increase the scratchpad to it's full 1k. Just thinking out loud, while mapping out possible minor upgrades and improvements when it comes to the included ram setup. 3 Quote Link to comment Share on other sites More sharing options...
+dhe Posted August 30 Share Posted August 30 Just a thought, the Pico Sidecar might make a nice companion? Are you planning on printing the case, or having it printed some where? 3 Quote Link to comment Share on other sites More sharing options...
Artoj Posted August 30 Share Posted August 30 One thing I really like about this card is the SPACE that the original lacks, it a hackers dream, lots of room to put interesting plug-in and jumper cards, I am guessing trouble shooting would be a cinch, access everywhere. My case design will have portholes everywhere and there looks like lots of room for a set of internal micro expansion cards, maybe a SAMSIDE and a USB/SD card would be all it needs. 12 hours ago, dhe said: Just a thought, the Pico Sidecar might make a nice companion? Yes that would be a nice touch, still I am thinking inside the main case, maybe I could route the 44 rear expansion to have a place to add micro-cards internally. Lets see how I fair when I start building up the case and boards. 2 Quote Link to comment Share on other sites More sharing options...
+dhe Posted August 30 Share Posted August 30 Who needs screws at this point? I was thinking maybe the case should just have a couple of hinges on back? 😅 4 Quote Link to comment Share on other sites More sharing options...
Gary from OPA Posted August 30 Share Posted August 30 1 hour ago, Artoj said: One thing I really like about this card is the SPACE that the original lacks, it a hackers dream, lots of room to put interesting plug-in and jumper cards, I am guessing trouble shooting would be a cinch, access everywhere. My case design will have portholes everywhere and there looks like lots of room for a set of internal micro expansion cards, maybe a SAMSIDE and a USB/SD card would be all it needs. Yes that would be a nice touch, still I am thinking inside the main case, maybe I could route the 44 rear expansion to have a place to add micro-cards internally. Lets see how I fair when I start building up the case and boards. Yes, the space around each chip is great, making this board a dream to work on various prototypes for addon modules, hacks, upgrades, testing. As for case, since I going to be mucking around with the actual hardware and probing and testing, I will design only a open frame case giving the keyboard and power supply support and the board underside and right height for using the back expansion port, the top will need to stay fully open, maybe just a loose dust cover piece when not turned on. 2 Quote Link to comment Share on other sites More sharing options...
Artoj Posted August 30 Share Posted August 30 One thing I need to know right now, is what is the metric footprint of the main board so I get a nice head start designing the case, thanks... Arto. Quote Link to comment Share on other sites More sharing options...
RickyDean Posted August 30 Share Posted August 30 15 minutes ago, Artoj said: One thing I need to know right now, is what is the metric footprint of the main board so I get a nice head start designing the case, thanks... Arto. It appears, in Kicad, to be 349.935mm X 223.990mm. Hope that helps. 2 Quote Link to comment Share on other sites More sharing options...
RickyDean Posted August 31 Share Posted August 31 On 8/25/2024 at 5:02 PM, Gary from OPA said: case does look nice. Personally, I wish the keyboard was a bit better, it needs a num pad and cursor keys if possible. I do know that if I use JasonACT's pico sidecar with this, I'll have access to even usb numberpads. Have already tested one with it. 2 Quote Link to comment Share on other sites More sharing options...
JasonACT Posted August 31 Share Posted August 31 24 minutes ago, RickyDean said: I do know that if I use JasonACT's pico sidecar with this, I'll have access to even usb numberpads. Have already tested one with it. I'm afraid it won't work, this new computer has 32KB expansion RAM (on the 16 bit bus) and my DSR will disable USB keyboard access when it tests for it during a reset. Same for 2MB SAMS. Maybe the DIP switches on the board can disable that though? Quote Link to comment Share on other sites More sharing options...
Gary from OPA Posted August 31 Share Posted August 31 17 minutes ago, JasonACT said: I'm afraid it won't work, this new computer has 32KB expansion RAM (on the 16 bit bus) and my DSR will disable USB keyboard access when it tests for it during a reset. Same for 2MB SAMS. Maybe the DIP switches on the board can disable that though? Not sure about the configuration of the 99/22 but for your pico w sidecar project, I would like to see a configuration file on the SD card that could be edited to turn on and off certain features. Quote Link to comment Share on other sites More sharing options...
RickyDean Posted August 31 Share Posted August 31 I would say that as long as you didn't plug in a 32k sram that you should be able to utilize off board ram, like a 32k card in a peb box. Maybe @stevee671 can chime in? 1 Quote Link to comment Share on other sites More sharing options...
Gary from OPA Posted August 31 Share Posted August 31 Just now, RickyDean said: I would say that as long as you didn't plug in a 32k sram that you should be able to utilize off board ram, like a 32k card in a peb box. Maybe @stevee671 can chime in? Maybe, I need to download and study the 99/22 schematics, as I think he is also using those 16bit ram chips to do the scratch pad ram as well. Quote Link to comment Share on other sites More sharing options...
Like us on Facebook
Follow us on Twitter
AtariAge on Instagram
Watch us on YouTube
Chat on Discord
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.