On 15/03/21 16:55, Philippe Mathieu-Daudé wrote:
Since you ask, I'd love to have things solved differently... One PIC has 8 IRQs, so we should model 2 cascaded PICs as 2 cascaded QOM PICs. But this code is so old and heavily used that my desire is unlikely to be realized. And your patch is simpler :>
They are modeled like that, see i8259_init. Perhaps you mean that pic_read_irq should call itself recursively on the slave PIC if irq == 2 && s->master?
Paolo
