MAME: Touchscreen

[Pernod]

Would love to see emulation for the User Port and touch-screen added so it will work with some of the special needs educational stuff.

I'm interested in adding the Touchtech 501. The user port is already emulated for mouse and Watford Speech, isn't the Touchtech connected to RS423 though? Were there other touch screen solutions that used the user port?

For the Touchtech does anyone have an image of the firmware that runs on the 6511Q?

[OneSwitch]

The Touchtec 501 is connected via the RS232 (and takes extra power from underneath but not important).

I don't have the firmware, but I know Matt Godbolt managed to get it working recently (you can see it here if you SHIFT+BREAK then use a mouse and left-click to act as the touch-screen:

https://bbc.godbolt.org/?autoboot&disc= ... 1.ssd?dl=0

BeebEm got compatibility too from a request I made many years ago, although I've forgotten to whom.

I can ask him if he has any thoughts if helpful. Would be brilliant to get this working.

[Pernod]

I don't have the firmware, but I know Matt Godbolt managed to get it working recently (you can see it here if you SHIFT+BREAK then use a mouse and left-click to act as the touch-screen:

https://bbc.godbolt.org/?autoboot&disc= ... 1.ssd?dl=0

BeebEm got compatibility too from a request I made many years ago, although I've forgotten to whom.

Thanks, I wasn't aware that either of those supported the Touchtech, which is surprising. I'll take a look.

[OneSwitch]

In BeebEm (I use version 4.14 for Windows)... Go to Comms, turn RS232 on and output to Microvitec Touch Screen.

[OneSwitch]

Here's a big batch of Touch Screen software that may be useful to test with: https://www.dropbox.com/sh/7385bjbb1fyd ... 6X9Ra?dl=0

[Pernod]

Another callout to any Touchtech 501 or Cumana Touchpad owners!

If anyone has either of these RS423 devices I'm looking for internal photos of them, and ROM dumps of the firmware they each run.

[stevei2791]

I have the Cumana touchpad here but there is no obvious way in, I have the cable and I also found the disc for it.

https://github.com/sai2791/dumpo/blob/main/disc.gif disc picture
https://github.com/sai2791/dumpo/blob/m ... 04%202.gif back
https://github.com/sai2791/dumpo/blob/m ... 01%202.gif endplate

I've tried the screws on the endplate but they turn forever and don't seem to be screwed into anything

[Pernod]

I've tried the screws on the endplate but they turn forever and don't seem to be screwed into anything

I don't want you to damage it but maybe it clicks together somehow and need to find the clips to prise it apart.

Not sure whether the original disc has been imaged, so that would be useful too.

[BeebMaster]

I too have a Cumana Touchpad, but I've never opened it:

https://www.beebmaster.co.uk/8bitadd/Touchpad.html

There was no ROM as far as I know, the software that came with it was on tape, which I transferred to DFS disc:

https://www.beebmaster.co.uk/Downloads/Touchpad

(There's no filename extension, but it's a 200K file exactly, so it will be what we now call "ssd".)

[Pernod]

There was no ROM as far as I know, the software that came with it was on tape, which I transferred to DFS disc:

There will be a ROM inside the Touchpad, and some unknown MCU, scanning the Touchpad and transmitting the serial data.

[BeebMaster]

Oh right, a ROM inside the Touchpad rather than a BBC sideways ROM. Maybe one day I will be adventurous enough to take it to bits. Just separating the two halves of the polystyrene box was a pretty big risk for the likes of me.

[RobC]

One of my Touchpads is opened and I have a Microvitec Touchscreen. I'll take photos soon.

[Pernod]

One of my Touchpads is opened and I have a Microvitec Touchscreen. I'll take photos soon.

Awesome, I'll hold off from HLE'ing the Touchscreen (as done in BeebEm) if the actual ROM will be available soon to do the job properly.

[RobC]

The Touchpad:

[RobC]

The Touchscreen:

[RobC]

I'll dump the Touchscreen EPROM tomorrow.

[Pernod]

I'll dump the Touchscreen EPROM tomorrow.

Thanks for the photos. That HD6801 in the Touchpad apparently has 2K internal ROM, so presume that's out of reach for now.

[RobC]

That HD6801 in the Touchpad apparently has 2K internal ROM, so presume that's out of reach for now.

I'll have a look - I think the board above it could be difficult to remove as it wasn't clear to me how it's attached. If I can get it out, does anyone know how to read the ROM?

[RobC]

Here's the Microvitec Touchscreen ROM. Even though it's a TMS2516, I read it as an AMD2716 as that's all my programmer can do. However, I think it should be okay as I believe they are equivalent.

The label says v1.1.

[Pernod]

Here's the Microvitec Touchscreen ROM. Even though it's a TMS2516, I read it as an AMD2716 as that's all my programmer can do. However, I think it should be okay as I believe they are equivalent.

The label says v1.1.

Thanks, looks reasonable, will be fun to play with.

I don't yet have any suggestions of how to extract ROM from the HD6801.

[RobC]

I found this. Not simple but doable.

[RobC]

I don't want you to damage it but maybe it clicks together somehow and need to find the clips to prise it apart.

For anyone trying to open up a Touchpad, there are two "hidden" screws in the top of the case. One is at the bottom of the hole for the stylus and the other is opposite it under the small Cumana label.