hi ppl. about the floppy disk controller, i'm using an intel 82077 all-in-one chip;
so i went to check the wiki along the datasheet:
https://wiki.osdev.org/Floppy_Disk_Controllerthen i saw the note,
"Note2: some tutorials seem to claim that changing/setting the datarate causes an IRQ6. This is false."
However, the 82077 datasheet page 41, shows a diagram with a procedure to init the controller that includes "Program Datarate via CCR" then "Wait for interrupt" then "Issue Sense Interrupt Status".
it seems that the fdc is not making an IRQ after setting CCR, (for now my program just aborts the wait with a timeout).
i'm still wondering why is stated in the datasheet that one should get an irq.
http://www.buchty.net/casio/files/82077.pdf