A92: 92,92+ Video Controller
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A92: 92,92+ Video Controller
I figured out some interesting things about the LCD drivers of the 92
display.
The 92 uses 3 column LCD drivers and 2 row LCD drivers, both datasheets
avaiable at the Toshiba Website(see link at the bottom).
The column driver is called T6A39A and the row driver is called T6A40.
The T6A39A got 80 pins for data output and 20 for I/O Settings.
3 of 80 bits make 240 (like 240 columns on the 92)
The T6A40 got 68 pins for data output and 24 pins for I/O Settings.
If we can directly access the I/O Settings, maybe we will be able to
optimize the display settings. If you play mario92 or other games you often
see that kind of shadow on pixels which should be offset.(often grey like in
gray4lib). We could activate the 32 byte lines option and the grayscale
option(hardware based). Perhaps there could be a way to point 600010 to
every byte, not only every 8th byte. Or to decrease the line size to 160
pixels(89 line size). There are so many things undiscovered. I have included
things Tleilax(zorg@humanoid.net) discovererd about the Interrupts of the
videocontrollers.
At this site you can download a 2MB (600 dpi) jpg picture of the 92
mainboard, very useful to check the connections of the pins.
http://www.geocities.com/SiliconValley/Peaks/6869/
At this site you can download the data sheets of the T6A39A and T6A40
chips
http://www.toshiba.com/taec/components/Datasheet/T6A39DS.pdf
http://www.toshiba.com/taec/components/Datasheet/T6A40DS.pdf
Info_eng.ti
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