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

I connected the cap and resistors from BB3 to 4 other TMS1100s - two were B-revision dies and two were E-revision. Interestingly, the Es are faster than the Bs- B amateur = 169K, B pro = 218K, E amateur = 188K, E pro = 244K. The original chip was a B, so I guess 169K/218K is the way to go.

I took a quick look at the Atari Video Pinball that I have. The chip has a different code: C010755-01 C02751. The date code is 7734, and it was made in Korea. It's a 40-pin DIP made by AMI. There's also a single 2112 RAM chip (256x4=1024 bits). The 8 RAM address bits are connected to the AMI chip pins 5-12, and the 4 data bits are connected to pins 20-23, and R/W is connected to pin 22. Ground is on pin 1 and VCC is on pin 25. Pins 26-34 and 36-38 are not connected. Pins 2 and 3 look like the oscillator inputs- there is a crystal (no frequency marked) and trimmer cap connected to them. Pin 4 connects to the speaker. Pin 40 connects to the paddle, so maybe an ADC. The buttons connect through a 4019 to pins 17, 18, 19 and a couple more that I think I wrote down wrong.

I'll take a closer look later.

Can I just say how fricking awesome it is, in the span of about 6 months, to be seeing dumps and emulation of these handheld (and other) games to be just absolutely pouring into MESS?

These sorts of games have been like the last bastion of completely undumped and unemulated games for the entire life of the emulation community, and in like half a year you guys have just blown it wide open. You all are doing great!

Just for fun, I measured several of the TI dice:

Little Professor 1978 1990C - 3.35mm x 4.44mm
TI-1270 0970 - 4.05mm x 4.80mm
Entex Baseball 1 1000 - 4.47mm x 4.63mm
Stop Thief 0980 - 4.57mm x 4.93mm
TI-30 0980 - 4.59mm x 4.93mm
Merlin 1100 - 4.75mm x 5.56mm
Total Control 4 1400 - 4.76mm x 5.79mm
Entex Baseball 3 1100 - 4.77mm x 5.73mm
Speak&Spell CD2302 - 4.88mm x 6.34mm
Speak&Spell 0281 - 5.36mm x 5.45mm
Speak&Spell 0271 - 5.44mm x 5.85mm

I got the LightFight. This one has a National Semi COP421L, with additional markings HLA/N /B119. The COP444L from Entex Space Invader was marked HRZ/N /B139, so I'm guessing HLA/N specifies the ROM contents and /B119 is the date code. I should be able to electronically dump this one, although I might have more difficulty finding the start since it has less ROM space and therefore probably has less unused space, which helped me with Space Invader.

Worst case, I'll have to force opcodes to start the dump at 000. Now that Kevin found the errors in the app note, that'll be easier!

Unexpected, but if it's dumpable, no problem
The COP400 emu in MESS looks good, I just need to make a handheld driver for it (and that space invaders game too).

Thanks! It's probably times-2? eg. (169K*2)hz: approx 340khz.

natsemi had weird markings on chips; the original ceramic mask roms for the digitalker (ssr1/ssr2 word set) one of them has GUD/D on it as a rom code.

LN

I didn't think about that last night, but those numbers are pretty slow. I used an oscilloscope on pin 18 and measured about 6uS between peaks for amateur and about 4.5uS for pro. To get more accuracy, I measured the time for multiple peaks and divided. I averaged the timing for the two B chips, but they were pretty close.

The frequency vs resistance chart in the TMS1000 manual doesn't have a plot at 33pF, but extrapolating, 47k ohms could easily be 340kHz (just noticed that's at 15V and I measured at 9V, not sure how that affects it). That would put Pro at 436kHz, which is a little over the maximum recommended oscillator frequency of 400kHz. The manual does indicate a +/- 20% frequency variation, though.

I'll measure some other TMS1100s in their original circuits and see how they compare.

Here's a picture of the omega virus pcb
parts - https://imgur.com/Sx6DeY5
solder - https://imgur.com/aTE26PN
game info - http://www.boardgamegeek.com/boardgame/3086/omega-virus

BOM
U1 - TI 3253ACT OMEGA VIRUS CSM11161AN
C1 - 103
C2,C3 - 30
C4,C5 - 10uF
R1 - 41K
R2 - 21
R3,R4,R5,R6 - 410
Q1,Q2,Q3,Q4 - 324 PN 2907A
Y1 - 7.68MHz
pwr - 4 AA batteries
spkr - 8ohm 0.3w
case has 1992 on it

let me double check those resistors with a meter, the bands look brown in person, but purple in that picture

47 and 27 makes more sense than 41 and 21