static void ne2000_ioport_write(void *opaque, uint32_t addr, uint32_t val) { NE2000State *s = opaque; int offset, page; addr &= 0xf; #ifdef DEBUG_NE2000 printf("NE2000: write addr=0x%x val=0x%02x\n", addr, val); #endif if (addr == E8390_CMD) { /* control register */ s->cmd = val; if (val & E8390_START) { s->isr &= ~ENISR_RESET; /* test specific case: zero length transfert */ if ((val & (E8390_RREAD | E8390_RWRITE)) && s->rcnt == 0) { s->isr |= ENISR_RDC; ne2000_update_irq(s); } if (val & E8390_TRANS) { qemu_send_packet(s->nd, s->mem + (s->tpsr << 8), s->tcnt); /* signal end of transfert */ s->tsr = ENTSR_PTX; s->isr |= ENISR_TX; ne2000_update_irq(s); } } } else { page = s->cmd >> 6; offset = addr | (page << 4); switch(offset) { case EN0_STARTPG: s->start = val << 8; break; case EN0_STOPPG: s->stop = val << 8; break; case EN0_BOUNDARY: s->boundary = val; break; case EN0_IMR: s->imr = val; ne2000_update_irq(s); break; case EN0_TPSR: s->tpsr = val; break; case EN0_TCNTLO: s->tcnt = (s->tcnt & 0xff00) | val; break; case EN0_TCNTHI: s->tcnt = (s->tcnt & 0x00ff) | (val << 8); break; case EN0_RSARLO: s->rsar = (s->rsar & 0xff00) | val; break; case EN0_RSARHI: s->rsar = (s->rsar & 0x00ff) | (val << 8); break; case EN0_RCNTLO: s->rcnt = (s->rcnt & 0xff00) | val; break; case EN0_RCNTHI: s->rcnt = (s->rcnt & 0x00ff) | (val << 8); break; case EN0_DCFG: s->dcfg = val; break; case EN0_ISR: s->isr &= ~(val & 0x7f); ne2000_update_irq(s); break; case EN1_PHYS ... EN1_PHYS + 5: s->phys[offset - EN1_PHYS] = val; break; case EN1_CURPAG: s->curpag = val; break; case EN1_MULT ... EN1_MULT + 7: s->mult[offset - EN1_MULT] = val; break; } } }