My "Library" for ST7920 Graphical displays, works fine, but...

[CuriousOne]

Bought larger version, which has 128x64 pixels arrangement.
But the issue is, that above code can write only to upper 32 lines of display.

https://blog.projectryu.com/using-di...d-with-pic18f/

This appears to be quite similar, but not exactly, to my module. And by sending some wild bits, I found out two things:

1. it is somehow possible to adjust contrast via software, but I guess, I'm sending wrong bytes, since display hangs after this (but remaining picture has high contrast)

LCDOUT $FE, $80
LCDOUT $FE, 10

above mentioned code mentions some X variable, which seems to be the "divider" between upper and lower parts of the screen, based on this pic: https://blog.projectryu.com/wp-conte...ddress-Map.jpg

But I can't get idea, where to write it?

[CuriousOne]

Solved issue with writing to lower lines.
These screens are actually divided into 64x32 blocks, which are addressed as 256x32, but physically located as
AB
CD
So this is it.

[CuriousOne]

Will post "Upgraded" version soon - it now supports individual attributes for all chars, like language, inversion, underline, striketrough. Working on variable width character support too.

[CuriousOne]

Ordered 128x64 display from the different manufacturer.
It has proper dimensions - the screen above is almost square, as you can see, and the new one has proper proportions.
But it also has 20 pin connector, instead of standard 16 pin, and while it works, seems that addressing mode is different in graphic mode, haven't figured it yet. Will post update once "solved".