* Stefan Reinauer <[EMAIL PROTECTED]> [040517 17:51]:
> There needs to be some way to call into interrupts set up by the
> executed option rom, or otherwise functions like handleint21() will have
> to be added and changed for every minor release of a vga bios update.
There's a potential hint in src/arch/i386/lib/idt.c:biosint():
// cases in a good compiler are just as good as your own tables.
switch (intnumber) {
case 0 ... 15:
[..]
#ifdef CONFIG_PCIBIOS
case PCIBIOS:
[..]
#endif
case MEMSIZE:
[..]
#ifdef CONFIG_INT21HANDLER
case 0x15:
[..]
#endif
default:
[..]
}
It looks like this case construct was done for readability, but in fact
some kind of interrupt lookup table is needed to handle things
correctly.
Stefan
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