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The pics are good enough, that's no problem =) but!
It looks like the output PLA is hiding from us, it's probably in the upper-right section of the die then.

Before deciding to sacrifice a chip(s), I think I should try getting the games work by faking their PLA (same with what we do on some TMS1x games)

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If all goes to plan, a new MAME release is due in 3 days. Here's a summary of what we added.

working,playable:
- Bandai Tamagotchi
- Entex Turtles
- Entex Stargate
- Milton Bradley Lightfight

added but not working yet:
- Castle Toy Einstein (COP400)
- Coleco Frogger (WIP)
- Entex Color Football 4 (WIP)
- Entex Basketball 2 (WIP)
- Mattel Funtronics Jacks (COP400)
- Mattel Funtronics Red Light Green Light (COP400)
- Milton Bradley Plus One (COP400)
- Ritam Monty Plays Scrabble (WIP)
- Ritam Master Monty (WIP)

(WIP) = work in progress, no big problems expected.
(COP400) = assumed CPU core emulation bugs

Tomy Breakup and the batch of Rik's games that kevtris dumped/will dump, will be added later.

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Originally Posted By hap
If all goes to plan, a new MAME release is due in 3 days. Here's a summary of what we added.

working,playable:
- Bandai Tamagotchi
- Entex Turtles
- Entex Stargate
- Milton Bradley Lightfight

added but not working yet:
- Castle Toy Einstein (COP400)
- Coleco Frogger (WIP)
- Entex Color Football 4 (WIP)
- Entex Basketball 2 (WIP)
- Mattel Funtronics Jacks (COP400)
- Mattel Funtronics Red Light Green Light (COP400)
- Milton Bradley Plus One (COP400)
- Ritam Monty Plays Scrabble (WIP)
- Ritam Master Monty (WIP)

(WIP) = work in progress, no big problems expected.
(COP400) = assumed CPU core emulation bugs

Tomy Breakup and the batch of Rik's games that kevtris dumped/will dump, will be added later.


Thank you very much hap, Sean Riddle and Rik smile


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Originally Posted By kevtris
Originally Posted By seanriddle
Tandy Baseball has a PIC1650A- maybe I can dump this one; I know Kevin can.
I can dump the 1650 right now, btw.

Help me, Obi ROM Kenobi- I just spent a couple of hours trying to dump the PIC1650A from Tandy Baseball. I put it on a breadboard and wired pin 1 to ground, pins 39 and 40 to +6V, pin 37 (/MCLR) to +6V via a resistor, pin 36 (OSC) via a 22K resistor to +6v and via a 47pF cap to ground, and pin 38 (/RTCC) to pin 35 (CKOUT). With pin 5 (TEST) low, the chip runs normally. But like the PIC1655A from Maniac, when I tie that pin high, the chip just locks up.

The resistor and cap on the OSC pin are the same as on the game, but I also fed it an external clock at 100, 200, 400 and 500 kHz, and verified CKOUT was 1/4 the rate. I also tried VCC at 5V and 6V, and TEST at 1.5V, 3V, 4.5V, 6V and 7V.

I put a socket on the game's PCB and plugged the chip in and everything still works fine.

I got a Milton; I know you dumped its speech ROMs before. I decapped the M6805, and I'll see if I can dump the ROM visually. If so, we might be able to figure out how to dump the ROM electronically using the test code.

Last edited by seanriddle; 05/25/15 02:06 AM.
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Anyone heard from Kevin lately? He seems to have disappeared... smile

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(since he didn't reply to sean either, let me..)
In short he's very busy with a work project at the moment, patience. =)

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That's cool, no rush... Just wanted to be sure all was well. smile

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Sorry, haven't disappeared. I have been hard at work getting the HDMI NES project done. It's crunch time and I have to get it done to get it into testing.

I haven't forgotten those games. hehe. actually I have dumped the CPUs on several of them.


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sean: my dumper is at work, but I will try and write something up about how it works. in the mean time, the secret seems to be RA3 it looks. I think it controls if the ROM will dump or not.

you hook power up, an RC, and then reset will return the PC back to the start (I think it actually starts at the very last location in ROM), and I used the clkout pin next to the RC pin to time the dump.

RA4-7 and RB0-7 is where the data comes out. you have to pull test high, also. I just have it wired to 5V by the looks of it when I gave it a quickie look-see friday.

you can just wire it up on a breadboard for testing. that's how I figured it out the first time.

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Thanks! I just got back from a business trip so I haven't messed with it recently. I'll try to carve out some time tomorrow to play with RA3.

I've got a raw bit dump of the 6805 from Milton; I'll try to figure out the logical bit arrangement, and see if the test ROM has the ability to dump the ROM.

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