feyrer@rfhs8012.fh-regensburg.de said:
> IC... Any takers? :) 

Can you try the appended patch?

best regards
Matthias


Index: pchb.c
===================================================================
RCS file: /cvsroot/syssrc/sys/arch/i386/pci/pchb.c,v
retrieving revision 1.17
diff -c -r1.17 pchb.c
*** pchb.c	1998/10/10 14:12:21	1.17
--- pchb.c	2000/05/03 10:09:41
***************
*** 187,192 ****
--- 187,193 ----
  	struct pcibus_attach_args pba;
  	pcireg_t bcreg;
  	u_char bdnum, pbnum;
+ 	pcitag_t tag;
  
  	printf("\n");
  
***************
*** 242,247 ****
--- 243,283 ----
  					       I82424_CPU_BCTL_REG, bcreg);
  				printf("%s: disabled CPU-PCI write posting\n",
  					self->dv_xname);
+ 			}
+ 			break;
+ 		case PCI_PRODUCT_INTEL_82451NX_PXB:
+ 			pbnum = 0;
+ 			switch (pa->pa_device) {
+ 			case 18: /* PXB 0 bus A - primary bus */
+ 				break;
+ 			case 19: /* PXB 0 bus B */
+ 				/* read SUBA0 from MIOC */
+ 				tag = pci_make_tag(pa->pa_pc, 0, 16, 0);
+ 				bcreg = pci_conf_read(pa->pa_pc, tag, 0xd0);
+ 				pbnum = ((bcreg & 0x0000ff00) >> 8) + 1;
+ 				break;
+ 			case 20: /* PXB 1 bus A */
+ 				/* read BUSNO1 from MIOC */
+ 				tag = pci_make_tag(pa->pa_pc, 0, 16, 0);
+ 				bcreg = pci_conf_read(pa->pa_pc, tag, 0xd0);
+ 				pbnum = (bcreg & 0xff000000) >> 24;
+ 				break;
+ 			case 21: /* PXB 1 bus B */
+ 				/* read SUBA1 from MIOC */
+ 				tag = pci_make_tag(pa->pa_pc, 0, 16, 0);
+ 				bcreg = pci_conf_read(pa->pa_pc, tag, 0xd4);
+ 				pbnum = (bcreg & 0x000000ff) + 1;
+ 				break;
+ 			}
+ 			if (pbnum != 0) {
+ 				pba.pba_busname = "pci";
+ 				pba.pba_iot = pa->pa_iot;
+ 				pba.pba_memt = pa->pa_memt;
+ 				pba.pba_dmat = pa->pa_dmat;
+ 				pba.pba_bus = pbnum;
+ 				pba.pba_flags = pa->pa_flags;
+ 				pba.pba_pc = pa->pa_pc;
+ 				config_found(self, &pba, pchb_print);
  			}
  			break;
  		}