1980 Gottlieb James Bond 007 Double ROM with switch (timed & 3-5 ball play)
A Pinside member emailed me asking about this mod recently, so I figured I'd share this with all.
I have done this mod during a repair a couple of years ago and it worked great.
Items needed
2732 blank EPROM
EPROM Burner
Soldering iron & solder
SPST or SPDT switch (mini or sub-mini)
1K Ohm resistor 1/4a
wire (30 AWG) works best
Hot glue gun
ROM files for Gottlieb James Bond 007
Download the 2 ROM files for Gottlieb James Bond 007
658-1.cpu (timed play)
658-x.cpu (3-5 ball play)
I won't tell you where you can get them, but think VP.
Combine the files in DOS using the copy command
copy /b 658-1.cpu1+658-x.cpu bonddbl.bin
The combined files now fit on a 2732 EPROM
burn the new 2732 with bonddbl.bin
Lift pin 21 on the 2732 EPROM
You can hot glue the switch to the EPROM
Solder a wire and one end of a 1K resistor the middle leg of the switch.
Solder the other end of the wire to pin 21 (A11) of the EPROM
Solder the other end of the resistor to +5v (pin 24) of the EPROM
Solder the other pin of the switch with a wire to gnd (pin 12) of the EPROM
Leave the last pin (if your switch has one - SPDT) open (connected to nothing)
When soldering to the EPROM, solder only to the top of the pin (closest to the plastic casing),
do not solder to the legs that will be inserted into the socket.
Pin 21 won't matter because it will not be inserted into the socket.
Remove the original EPROM then insert the new EPROM into the MPU (be sure not to insert it backwards).
I know most of you are aware, this is done with power off!
If this is done correctly, you will be able to switch between the two.
Do not switch with power on!