PCI_AGP_COMMAND
sc->as_capoff + PCI_AGP_COMMAND, command);
pci_conf_write(pa->pa_pc, pa->pa_tag, capoff + PCI_AGP_COMMAND,
sc->as_capoff + PCI_AGP_COMMAND, command);
pci_conf_write(pa->pa_pc, pa->pa_tag, capoff + PCI_AGP_COMMAND,
rval = regs[o2i(capoff + PCI_AGP_COMMAND)];