82091AA Datasheet, PDF (57/204 Pages) Intel Corporation – ADVANCED INTEGRATED PERIPHERAL (AIP)

82091AA
4 2 4 HARDWARE BASIC CONFIGURATION
The Hardware Basic configuration mode permits the
user to assign addresses to the serial ports and par-
allel ports This is achieved by sampling several of
the serial port connections at the end of a hardware
reset The PPDIR GCS signal defaults to game
port chip select output (GCS ) The 82091AA pow-
er supply voltage is not selectable in this mode and
is fixed at 5V The parallel port mode is set to ISA-
Compatible In addition the FDC floppy drive sup-
port is set at two floppy drives If configuration regis-
ter access is enabled the access address is fixed at
398h 399h To reconfigure the 82091AA using soft-
ware the 82091AA configuration mode must be
changed to SWAI mode (refer to AIPCFG1 register)
Figure 21 shows the implementation of a basic hard-
ware configuration
Figure 21 Hardware Basic Configuration
290486 – 21
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