Home Page Forums MAME MAME TMS-09xx/1xxx thread (was New Dumps)

What about twitter?

I would assume the same rule: public Tweets are OK to talk about, DMs are not. (And I specifically mean DMs, not something like "@plgDavid LOL I made ChipSpeech sound like a cat").

Yep, that's correct. O4 and O5 go to some unpopulated traces. There are places for 5 resistors/diodes that would have connected K4 and K8 with O4 and O5. But as it is, they are NC.

I picked up the controller for one of these. It looks identical to the pic you posted. Anyone have a manual? This one came with an LED module and a speaker module, but I'm not sure if something's broken, or I just can't figure out how to turn them on.

I uploaded more pics of the Touch And Tell chips: www.seanriddle.com/touchntell.html

Sean, I am intrigued about what you are doing, how do you read a microscope picture like this into a ROM image?

I can see the bits but how are they coming together to bytes etc? I am sorry if this is obvious but would appreciate
a pointer where I can learn more about it, I do have a USB microscope but doubt it is good enough?

It's not obvious, the information is not in that image. You either guess or hope someone has an image of what surrounds the rom array.

OG.

The owner has one I'll ask!

Edit:
https://twitter.com/Chris_Randall/status/685482428283154432
https://pbs.twimg.com/media/CYNSJEHUoAAUyfG.jpg:large

Yes!

David- thanks! I'm starting to think something is wrong with this unit, but maybe it's just not that intuitive.

Edstrom- as OG said, you need more info to go from that pic to the ROM dump. On two sides of the ROM array are circuits that select the row and columns for the selected byte. For this chip, you can see them above and to the left of the ROM array in this pic: http://www.seanriddle.com/tnt8012acid.jpg The circuitry above selects the page and the bits in the byte, while the circuitry to the left selects the byte in the page.

That circuitry was a bit overwhelming for me to decode when I started, so I took a picture of a ROM that Kevtris had already dumped, and figured out how the bits in the picture matched up to the bits in the dump: http://www.seanriddle.com/mp3438a_rom_acid.jpg

The lucky thing is that so far, all the TMS1100s have had the same ROM array layout, so the same process decodes all of them. In fact, the ROM arrays are extremely similar between the different TI microcontrollers.

I played with a USB microscope for a while, but the resolution was not high enough for me to decode the bits.

surprise calcs en route to hmm, Arcadia :p

1) http://datamath.org/Sci/Slimline/Business-Analyst-II.htm - should be TP0320 series MCU, for emulation testing
2) http://datamath.org/Sci/Slimline/TI-35.htm - can be either TP0320, 0455, or 0456
3) two of these(single auction) http://datamath.org/Sci/Slanted/TI-55-II.htm interesting calc, dual-mcu. On the ebay photo, one was larger than the other, we'll see if the insides is the same or not.