Skunkboard + EEPROM support

Shamus · May 9, 2012

The Skunkboard is a very useful development tool but for people who want to develop carts it's lacking EEPROM support. Would it be possible for the Skunkboard to simulate this? The flash is already there...

Zerosquare · May 9, 2012

What are you looking for exactly?

If it's high-level emulation (loading and saving a block of bytes), it could be done, but it's probably even easier to fake it using a file on the PC side and the built-in debug communication functions.

If you want low-level emulation (i.e. using the same code as the one for real EEPROMs), I don't think it can be done : the EEPROM isn't mapped anywhere in the address space, it uses a different (serial-based) protocol on separate pins of the cart connector, which are probably not connected to anything on the Skunk ; and since the Jaguar doesn't have a MMU, you can't virtualize and emulate accesses to the EEPROM.

Edited May 9, 2012 by Zerosquare

+CyranoJ · May 9, 2012

I asked many moons ago for the flash read/write code to implement save games for our games if ran from Skunkboard, and then promptly forgot about it. The BIOS is really easy to disassemble (it's a binary in the flash update) so maybe I'll go find it myself one day ;-)