Writing "ROM" on Lynx GD

[42bs]

Hi

is it possible to change the "ROM" (that is the active image) in the Lynx GD?

My goal is not to have to swap SD card every 30s to try a new boot-intro.

 

[laoo]

Yes. I'm doing this successfully in Unlit every scene.

 

Edit: oh, I probably misunderstood your intention. You can load new rom content from file, but not change image and reboot or something

Edited December 7, 2021 by laoo

[42bs]

22 minutes ago, laoo said:

Yes. I'm doing this successfully in Unlit every scene.

 

Edit: oh, I probably misunderstood your intention. You can load new rom content from file, but not change image and reboot or something

Yes, I wanted to write the "current" ROM. I guess the firmware moves the .LNX file from SD card to RAM and then reboots. Then the RAM is seen by the Lynx.

So it would be nice to modify this RAM from code running on the Lynx.

[laoo]

GD has API function ProgramROMFromFile that loads currently open file from actual position (seeks are cheap) to any continuous span of blocks in cartridge RAM - you specify start block, block count and block size. So I see some scenarios, but I guess that you are thinking about transferring data to Lynx program through ComLynx, writing data to a file, programming cartridge and jmp ($fffc). Should work

 

 

[42bs]

Cool, I give it a try.

_But_ .. where do I find the API? RetroHQ site is a pain and has no link to it.

Edited December 7, 2021 by 42bs

[MichelS]

https://github.com/RetroHQ/LynxGDLib