----------- | video | | adaptor | ----------- | | || | | AGP || ------- --------- | | || | NIC | | CPU |========| | ---------- ------- --------- |S| | PCI | || PCI bus |Y|======| North |=============================== ------------- |S| | Bridge | || || | Boot PROM |====|T| ---------- || ---------- --------- ------------- |E| || || | serial |---| modem | |M| ---------- || | port | --------- --------------- | | | main | || ---------- | FLASH memory|==| | | memory | || --------------- | | ---------- || |B| -------- SCSI bus |U| | SCSI |=================== |S| -------- | | | | ----------- ------------- | |=====| IDE |============================== | keyboard | | | ----------- | | | | ------------- | | HD CDROM HD ZIP | | | ---------- | | -------------- | mouse | | | | floppy | ---------- | |===============| disk |========= | | | | controller | | | | -------------- | | | -------------- | | |===| general | | | | | purpose |---- serial & parallel ports | | peripheral | (plus others) +-----------------| interface | --------------