viii
SCSI, X3T10 SPI/single ended levels...................................................3-10
VGA Video, VGA levels.......................................................................3-11
J5 Signal Descriptions..................................................................................3-13
General...................................................................................................3-13
Miscellaneous Signals ...........................................................................3-13
Keyboard/Auxiliary Device, TTL levels...............................................3-13
Universal Serial Bus (USB) (0 & 1), USB levels..................................3-13
Parallel LPT Port, TTL levels (some signals are redefined when
used in EPP/ECP modes).......................................................................3-14
Serial COM Ports (a & b), RS232 levels...............................................3-14
Floppy Disk Drive, TTL levels..............................................................3-14
EIDEa (ATA-2), TTL levels..................................................................3-15
Parallel port connector........................................................................................3-16
EIDE hard drive connectors................................................................................3-17
Floppy connector ................................................................................................3-19
PS/2 keyboard/mouse connector.........................................................................3-21
Serial ports COM1 and COM2 connectors.........................................................3-22
Fan power connector...........................................................................................3-23
USB ports 1 and 2...............................................................................................3-23
Ethernet connector..............................................................................................3-24
SCSI connector...................................................................................................3-25
Video connector..................................................................................................3-27
Reset switch........................................................................................................3-28
Chapter 4 Functional Description
Peripheral component interconnect (PCI) local bus.............................................4-1
PCI device mapping and routing....................................................................4-2
PCI routing table ............................................................................................4-3
Applications ...................................................................................................4-3
Watchdog timer.....................................................................................................4-3
I/O address map....................................................................................................4-4
Memory address mapping.....................................................................................4-6
Video controller ....................................................................................................4-7
Ultra SCSI controller..........................................................................................4-11
EIDE interface ....................................................................................................4-14
Floppy interface..................................................................................................4-14
Parallel port.........................................................................................................4-15
Serial ports..........................................................................................................4-15