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

Ok, it is working in MESS. The keypad row pins are the same internal output bits as the O-pins.
1 small emulation problem though, probably due to another unknown difference in the MCU: the equals sign (aka O-pin 7) is always on.

The 1976 TMS0970 version would still be interesting to acquire, to see the differences in the code.

That's interesting about the keypad rows. At those quantities, the cost savings on a simpler PCB must have justified the redesign.

Good news/bad news- I got the 1976 version, but some plastic stuck to the die: http://www.seanriddle.com/0970.html

I'll try to clean it off without damaging the bits below. I transcribed as much as I could. I see lots of similarities, but lots of differences.

The die from Entex Space Invaders also stuck to the plastic, and it took a lot of heat to get it free. The passivation layer crackled and obscured the die, which I've seen before. But previously I could still remove the metal layer with Whink and transcribe the bits. This time, Whink isn't working. So I guess the heat cooked the passivation layer enough that mild HF isn't able to dissolve it. I'll try some other acid.

Kevin- Are you putting VDD on the Rockwell MM78 test pin, or a different voltage? I got an MM75 as well as the MM76EL, and I'm not getting anything from either of them. I've tried several different voltages on VDD and the test pin.

Aww, good luck on round 2 with those dies(dice?).

I've heard it both ways. I think dice is preferred.

I got Super Simon (MP3476NLL 4050 WE 8022 PHILIPPINES) and Entex Baseball 2 (MP0923 G70019 MS ^ 7923). Both 28-pin SDIPs. Probably 1100 for the Simon and 1000 for BB2?

I use "dice" when talking about 6-sided or 20-sided used for playing board games and roleplaying games.

I use "dies" when talking about silicon chip cores embedded within ceramic (or whatever).

Maybe I'd be wrong, dunno...

See the top comments section for a list of known serials: http://git.redump.net/mame/tree/src/mess/drivers/hh_tms1k.c

Yes, it's very likely that S.Simon has a TMS1100 and BB2 a TMS1000.

I've got a couple more chips here that I've either not gotten to, or they are broken.

Science Fair (Radio Shack) Microcomputer Trainer - MP1312 MAS^8414 (chipped die, part of ROM damaged)

Kosmos Astro astrological thingy - TMS1400NL MP7314-N2 W 8027 PHILLIPINES (the die is labelled MP1133) (new, some plastic stuck on die)

Hah, that thing looks awesome

Kosmos Astro: MP1133 sounds like TMS1100, and the label is a fab error? TMS1400NL MP7314-N2 is Parker Bros SplitSecond!

I don't understand the die marking on the Astro, but I just double-checked the die shot and it's definitely a TMS1400 labeled MP1133.

Let me check my notes and pictures on the package labeling. I might have confused the 2 chips.

Edit: That's what I get for scribbling notes on slips of paper. The Astro chip package is labeled
TMS1470NLHL
MP1133
ML 7936
SINGAPORE

But the die says TMS1400. I haven't assembled a full die shot from the tiles yet, but it looks like a TMS1400. And the PCB has a bunch of transistors, so maybe they used a 1400 instead of a 1470?

I put up a quick composite of the Astro die: www.seanriddle.com/astrometal.jpg

I expected that the outputs would look different if it were a TMS1470 with VFD outputs, but it looks the same as the LED version. But the code number at the bottom of the die starts out 28H, whereas the other 4 TMS1400s start out 28L. I assume that means 28 pins, high or low voltage.