The restoration of a 1980's Williams Defender arcade machine
Testing the Chad’s Arcade Defender Memory High Score Save Chip
Our very nice friends at Chads Arcade sent over a couple of their Defender High Score save chips so that I could test them on our Defender machines at Skywire
And these kits are great – replacing the need to have the 3 x AA batteries, or CR2032 battery conversions on the main motherboard by a static DRAM memory chip, that permanently saves your high scores
To install, depending on your Motherboard, you need to remove the existing PCD5101 CMOS RAM chip as shown in these photos
New static RAM chip and adapter board
PCD5101 removed, and optional socket should your motherboard need one for the new chip
Install here
and once installed you can save your Highscores like normal without ever (*well not for a very very long time) having to worry about your batteries going flat or leaking all over your Motherboard and ruining your PCB with battery acid – Happy Days!
You can find Chad at chadsarcade@gmail.com and on UKVAC if you want to get one for your Defender too 🙂
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about 3 years ago
thanks for the info.. going to email Chad to find out a price 🙂
about 1 year ago
I have a defender game, I am looking into saving the scores? And possibly upgrade?
about 7 months ago
My Defender arcade machine started bringing up the menu whenever I turned it on. Also I think the high score were not saving. I replaced the CR2032 battery but no still not saving and menu always come up. Any ideas?
Thanks
Dave
about 6 months ago
If the menu comes up every time either the machine is still in Auto-Up mode (the middle red button inside the coin door to the right) or the battery power is not working
First try inverting the mode of the middle sticky-state button on the inner coin door button panel (3 red buttons)
Else check the power to the CMOS chip when the machine is off to see if it is getting +5V from the CR2032 battery (I think CR2032s are less V so it maybe what ever that is rated at)