Patch to fix the MB-H1 firmware

por gdx en 23-12-2021, 11:26

The original firmware searches if a ROM cartridge is inserted in the slot 1 or 2, if no ROM cartridge is found, the firmware is executed. Which is practical but the secondary slots are not taken into account, so if you insert a disk interface with several functions (memory expansion, megaflash-ROM, etc.), it will not be detected and the firmware will start, which causes a conflict.

You must replace the HN61364P ROM (IC34) from the mainboard by a 8/16K (e)eprom containing the patched firmware to fix this issue.

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mb-h1 firmware patch.zip746 bytes29hace 2 semanas 1 día