TI SD card

[Madhatter1]

This is similar  to a CF7, but use SD card and has nothing to do with CF7.

It allows a TI-99/4a to use disk image volumes on SD card as floppies.

I started this a couple years ago and have decided to share it in case someone else wants to build one.

 

https://github.com/dennishatton/TI-99-4a_SD_Disk_Project

[Shift838]

nice.  i may have to order a few PCBs from my supplier during my next round.

 

if anyone want's to get on board with a PCB shoot me an email.

[AtariNostalgia]

What's the estimated price on these?

[Shift838]

 

3 hours ago, Madhatter1 said:

This is similar  to a CF7, but use SD card and has nothing to do with CF7.

It allows a TI-99/4a to use disk image volumes on SD card as floppies.

I started this a couple years ago and have decided to share it in case someone else wants to build one.

 

https://github.com/dennishatton/TI-99-4a_SD_Disk_Project

Very cool project.  I checked out the Kicad project and there does not seem to be a created PCB file (just a blank one).  Did you ever get one tooled or have gerbers for the is project already?

[Madhatter1]

1 hour ago, Shift838 said:

 

Very cool project.  I checked out the Kicad project and there does not seem to be a created PCB file (just a blank one).  Did you ever get one tooled or have gerbers for the is project already?

There is no PCB and I don't intend to make one.

I built this using wire wrap for myself.

I never know when I will make a change.

 

If someone wants a PCB, They can use KICAD to make one.

I wished I would have used Eagle, Because Eagle is now part of Fusion 360.

In which case I could have milled a PCB on my CNC.

 

This ATMEGA162 emulates the disk controller and interfaces to the TI DSR rom.

 

[fabrice montupet]

I like your project and I think that I will make make one , thank you 🙂

[Shift838]

53 minutes ago, fabrice montupet said:

I like your project and I think that I will make make one , thank you 🙂

i think i will use the schematic to port it over to eagle then.

 

 

[RickyDean]

I've got two Bunyan and two Fetzer protoboards. I may take one and do this and the Nouspikel USB, both of them, on it, for the peb box.

[+FarmerPotato]

On 2/11/2021 at 4:05 PM, Madhatter1 said:

There is no PCB and I don't intend to make one.

I built this using wire wrap for myself.

I never know when I will make a change.

 

If someone wants a PCB, They can use KICAD to make one.

I wished I would have used Eagle, Because Eagle is now part of Fusion 360.

In which case I could have milled a PCB on my CNC.

 

This ATMEGA162 emulates the disk controller and interfaces to the TI DSR rom.

 

Nice! I use wire wrap too

 

So this acts like a drive attached to the TI controller? Or do you mean it has its own DSR ROM replaces the need for a controller?

 

 

 

[Madhatter1]

15 hours ago, FarmerPotato said:

Nice! I use wire wrap too

 

So this acts like a drive attached to the TI controller? Or do you mean it has its own DSR ROM replaces the need for a controller?

 

 

It uses the TI DSR rom. I wanted it that way so it would be total compatible.

 

 

[Madhatter1]

8 hours ago, Madhatter1 said:

 

I miss read your question.

It is complete, you do not need a TI disk controller.