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Both the 128x64 and 128x32 modules are led backlit, run on 5 volts and have on-board contrast voltage (Vee) supplies. They have a 20 pin connector. Standard interface to an mpu requires 14 lines
(8 for data and 6 for control)
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The Samsung KS0108 is a graphics only controller and does not have an on board character generator. Compared to other controllers like the Toshiba T6963C, the KS0108 has a limited amount of instructions. However, it
is quite easy to interface and program. My problem was trying to find documentation. The BG Micro, pamphlet gives some clues but no exact implementation. After numerous hours of
hunting on the internet I found just bits and pieces. Most of what I found came from, Hantronix Inc. their documentation is very helpful, since they gave an example program
written for an 8051 and from AZDisplays Inc.who provide excellent specifications in a pdf file.
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