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.