Perhaps - do you have a part number? Just about anything can be found on the internet.
This is what mine looks like. CSM-8826 is on the artwork it the back. Side is marked A5880SRSG-A, which seems incorrect - other A5880 parts I could find are only 16 pin parts.
I think I need to re-do my fonts to turn them 90 degrees for this part.
And do a little experimenting, see where "upper left" vs "lower right" is so the fonts make sense.
I defined an 8x32 array to represent the display, not sure I have that lined up with my chip callouts from left to right either.
So for example if I call 0,0 the lower left, 7,0 the upper left and 0, 31 the lower right and 7,31 the upper right, I'm not sure I'm send stuff there now.
Maybe I should flip it 31,7 for upper left and 0,0 for lower right - probably easier to visualize and keep straight that way.
Then call 3 the left display and go across 2-1-0 to the right.
Was just glad to show the hardware all worked to start - having left off +5/Gnd to 3 chips had me stumped for a bit 
CSM88261_red_green_8x8.pdf (266 KB)