njosnari Posted March 8, 2020 Report Share Posted March 8, 2020 I've gotten through construction of the base PCB, and partially through the control PCB, specifically the part with the LCD screen. When I plug it in, I get nothing from the screen when the unit powers up. I've loaded the bootloader onto a PIC, along with MIOS over midi, and the setup_MB6582 hex. So I am expecting to see something on the screen, but not even a backlight. The screen is a Midas MC42005A12W-VNMLR, a HD44780 equivalent, and I've checked the pinout and its the same configuration as in Hawkeye's tutorial. Can anyone help me trouble shoot this? Is it possible that I would need to bridge the jumper pads for 8bit operation? R80 is installed. I'm fairly certain the bootloader/mios/FW installed correctly. I have not yet inserted any SID chips yet. Is there any way that I can test if the screen is defective? I've popped the PIC out of core_1, and dropped in into 2, and still nothing from the screen. Only difference that I noticed, is that core_1 has a constant ~5v coming out of pin 9 on j15_core1, while I didnt see that on the other cores. I've tried adjusting P1, and P2_core1, etc. and no difference there either. Quote Link to comment Share on other sites More sharing options...
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