NCR 7454 - Hardware Monitor; PCI Expansion Header; IDE Header; Audio

1-14 Chapter 1: Product Overview
RS-232 DB-9 Male Connector Pinout
Pin Port A Port B
4 DTR DTR
5 GND GND 
6 DSR DSR 
7 RTS RTS 
8 CTS CTS 
9 RIor+12* RI 
*IfPort1or3ispowered,pin9willbe+12V.
Hardware Monitor
Thehardwaremonitorgeneratesaninterrupttothesystemwhenever
anyoftheinternalvoltagesusedbythesystemprocessorgoesaboveor
belowtheacceptableoperatingrange.Aninterruptisalsogenerated
whenthetemperatureoftheProcessorexceedssafelevels.Software 
canusethisindicationtosloworstop
thesystemand/orforceareset.
PCI Expansion Header
Asingleexpansionheaderisprovidedtosupportoptionalfeatures,
suchasthePCMCIAforWirelessLANBoard.Thisboardsupportstwo
Type2oroneType3PCMCIAtypecards.
IDE Header
AstandardIDEheaderisprovidedtosupportthe2.5ʺharddiskdrive
orthe64MBand256MBcompactflash.
Audio
ThebaseunithasSoundBlaster‐compatibleaudio.Wavetable
synthesisisnotsupported.FMsynthesisandMIDIaresupportedin
thehardware,butrequiressoftwaredriversupporttofunction.