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

Anyone have any info about dumping Rockwell MM76EL chips electronically? I picked up a Scrabble Sensor game (that's more like a word version of Comp IV than Scrabble), and it's got a Rockwell chip labeled B8610-11. The pinout matches the MM76EL, which is one of the PPS4/1 microcontrollers. The data sheet says pin 7 is TEST, which puts the chip "into a test mode which tests ROM and allows testing of the RAM and instruction logic", but I don't see any details.

Also, are there any data sheets around for non-PPS/4, non-6502 Rockwell MCUs/CPUs? I'd love to get a hint on the calculator chips used in the Mattel handheld games. The B6001EA from Battlestar Galactica looks much simpler than the PPS/4 chips, but maybe it's in the same evolutionary branch.

You have a die shot?

OG.

Here's a 2Kx2K pixel jpg. I've got a higher-res XCF if you want it. http://www.seanriddle.com/bsg.html

Nice, and hmmm. I don't recognize that tech.

It looks simple enough to vectorize and simulate, but damn, I really don't recognize that tech. The high-rez one could be more readable though :-)

Here's a 9K x 10K GIMP file: http://www.seanriddle.com/bsg.xcf

It looks like 180 bits of RAM and 512 bytes of ROM.

I like the pattern of the ROM array with the top metal layer removed.

I haven't looked at this for a while, but it seems that I guessed at pin numbering based on the PCB. I've got pin 3 in the upper left, with numbering going CCW. The chip was a 42-pin QIL, but there are only 31 pads on the die. It looks like pins 21-22, 27-33 and 40-41 were N/Cs to the die.

I transcribed the raw bits, but since I had no idea of the instruction set, I didn't try to figure out how to put them in logical order. www.seanriddle.com/bsgraw.bin

by the way, maybe we can pretend to emulate the XBOX:

note: I think there's a pretty good chance this has a TMSxxxx

Just put a bid on one. I got a Kosmos Astro (has a TMC1470) but missed out on an Entex Raise the Devil pinball because I forgot to check on it this morning. D'oh!

I won the Lightfight. I'll let you know what chip it uses.

I just noticed that the Entex Baseball (1) that I have has a three-position power switch- off/am/pro. Pics of the game just show off/on. But I don't see it routed to an input; instead, it looks like pro connects a 150K resistor to VDD (+9v). The other side of the resistor goes to pins 18 and 19, which are the oscillator pins, which are also (always) connected through a 47pF disc cap to ground. When the switch is am or off, the resistor is floating. So I'm guessing pro mode just makes the chip run faster?

It looks like it's wired the same on Baseball 3, but pro/am is on its own switch.

Interesting, Tomy Tennis uses the same trick. Could you measure the osc with it on Baseball 3 before taking it apart?