Custom marked Motorola chips

[xhoba]

Seeing CPUShack last sale, I just remember having this custom marked Motorola chip.
Perhaps a MC680x MCU, I didn't find any other chip with B51T Mask...

Any hints?

[hawelsh]

Hi! it appears to be a Keyboard Controller. I could not find a datasheet for it.
But i did find this:

http://translate.google.com/translate?hl=en&sl=de&u=http://www.mikrocontroller.net/topic/148164&prev=/search%3Fq%3Dzc86956p%26start%3D20%26safe%3Dactive%26sa%3DN%26biw%3D1274%26bih%3D864

[xhoba]

OK... So it could be a MC6820 or MC6821.

Thanks!