Hi,
There is a UK based retro enthusiast named Andy who goes by the name rasteri or therastery in different social media networks. He is famous in the circle for his hardware hacks and creations. One of these is called the HIDMan [1], which is a USB mouse/keyboard to PS2/RS232 converter. Andy approached the wider community to get comments and to get volunteers to test the device on the VOGONS [2] forum. On page 9 of the topic, another user (Eivind) is trying to test if he can change the keyboard typematic rate and delay from Freedos using the MODE CON RATE=xx DELAY=xx command only to conclude that he cannot do it because the function [4] that passes the values to the keyboard controller [5] in the keyboard is not implemented [6] in the Seabios based computer that he is using. This is obviously a very obscure and edge case as far as Seabios is concerned, probably not worth the effort to fix but it is, anyway, interesting as it highlights the issue that the users expected a certain BIOS function to be available and it was not. There are probably others... Maybe it would be nice to have a TODO file somewhere in the documentation highlighting issues like these, which could also serve as a guide to potential new contributors.
Cheers, Eduardo
[1] https://github.com/rasteri/HIDman [2] https://www.vogons.org/viewtopic.php?f=24&t=89777 [3] https://www.vogons.org/viewtopic.php?f=24&t=89777&start=160 [4] http://www.techhelpmanual.com/232-int_16h_03h__set_keyboard_typematic_rate_a... [5] https://github.com/Halicery/8042/blob/main/8048_AT_INTERN.TEXT [6] https://review.coreboot.org/plugins/gitiles/seabios/+/refs/heads/master/src/...