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Welcome to the FortunaBox wiki!

Specification

CPU

• Upon initialization, the CPU will start running the BIOS code at address 0x0.

Memory

• The memory map is as follows:

• The BIOS is contained between 0x0000 and 0x1fff.
• The shared memory (between 0x2000 and 0x3fff) is accessible from any bank. This can be used for storing variables when an application spans more than one memory bank.
• The upper memory (between 0x4000 and 0xffff) can be bankswitched in 8 different memory banks.
• If the register RAMONLY is active, then the whole 64kB of memory can be accessed as a single RAM. This is meant primarily to be used by CP/M, but can be used for other pourposes as well. If this mode is activated, backswitching will not work.

I/O

The I/O ports are as follows:

Port	Direction	Description
0x00	Output	Configure memory manager (bits 0~2: memory bank, bit 3: RAMONLY)

Boards

• CPU board
• Memory board
• Serial board
• Storage board
• Video board
• Debugger board

Developing for the FortunaBox

Hacking the box itself

• Uploading the debugger firmware