eptheca Posted December 9, 2013 Report Share Posted December 9, 2013 (edited) I have 2 MB-SID with 4x20 LCD's with ST7066 driver chip Sometimes the LCD "freeze" and/or display strange combination of characters like this: Initially the ST7066 driver chip should be compatible with HD44780, but after reading this http://www.ucapps.de/midibox_sid_manual_ki.html I decided to try out the 8 bit mode I have rewired the LCD according to the text, and tried different ways to get the application to use this mode. -Change ID app, #define MIOS_LCD_TYPE 7 (custom LCD driver) displays: "Rebooting MIOS" forever, restart no characters displayed -I could not find a DEFAULT_USE_CUSTOM_LCD_DRIVER switch in the setup_*.asm file, but inserted #define DEFAULT_USE_CUSTOM_LCD_DRIVER 1 into the file, but it still uses 4 bit mode Any suggestions? Cheers Edited December 9, 2013 by eptheca Quote Link to comment Share on other sites More sharing options...
eptheca Posted December 9, 2013 Author Report Share Posted December 9, 2013 OK, I think it's working in 8 bit mode now I used the Change ID app edited the main.asm file with #define MIOS_LCD_TYPE 7 compiled uploaded the hex with MIOS Studio got the "Rebooting MIOS" message on the LCD uploaded the SID hex The LCD works, and when I disconnect the wires that go to RE1 and RE2, lots of jibberish I take that to mean that it's running in 8 bit mode Just have to put it all together and hope it has solved the "freeze" problem Quote Link to comment Share on other sites More sharing options...
eptheca Posted December 9, 2013 Author Report Share Posted December 9, 2013 Yes, definitely running in 8 bit mode with custom LCD driver I did the same modification to my other MB SID as well The only thing that puzzled me was that after uploading the Change ID file, it was only displaying "Rebooting MIOS" forever. I realize that I'm just talking to myself here, but maybe it could help someone in the future :) Quote Link to comment Share on other sites More sharing options...
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