HB-F1XV black screen

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By fallen1

Resident (40)

fallen1's picture

09-11-2019, 10:25

It's the secondary ROM without epoxy - IC bottom right next to the coin battery:

By fallen1

Resident (40)

fallen1's picture

14-11-2019, 23:53

Just by pressing F3 while booting, the MEGAFLASHROM boots to multiMente (which is distorted) - hitting ESC and ENTER puts me to DOS - from there I was able to flash a game rom and after the restart - IT WORKS!

Of course I've tried to flash the missing XV firmware ROM, but that kept the system stuck after the MEGAFLASHROM detects the SD card (same like when no ROM was flashed)

I have some more questions:
- What does the F3 key? Seems like it skips the default bios, but I found no trace of such boot option in the manual
- What can be the cause of the of the distorted MultiMente? I would guess the VRAM, but the game/boot logo/dos/basic (with 1M of RAM :evil: ) seem to be without any issues

Thanks

By fallen1

Resident (40)

fallen1's picture

15-11-2019, 23:32

Some other games have issues too, so it's going to be VRAM after all

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