IBM Aptiva E40/E24
(250-0467/8)          System I/O Addresses            Faxback Doc. # 40721

This table shows the hexadecimal addresses for each of the system board
input/output (I/O) functions.  You may want to use this information if you
install an adapter card that requires you to set I/O addresses.

Address Range (Hexadecimal)       Function

0000-001F                         DMA controller 1
0020-003F                         Interrupt controller 1
0040-0047                         System timer
0050-0057                         System timer
0060-006F                         System controller 8742
0070                              CMOS RAM address and NMI mask
0078-007B                         Real-time clock
0080-009F                         DMA page register
00A0-00BF                         Interrupt controller 2
00C0-00DF                         DMA controller 2
00F0-00FF                         Math coprocessor
0171-0177, 0376                   Secondary IDE controller
01F0-01F7, 03F6                   Primary IDE controller
0200-0207                         Joystick
0220-022F, 0388-038B, 0534-0537   Audio
0330-0333                         MIDI
0278-027F                         Parallel port 2
02F8-02FF                         Serial port B
0378-037F                         Parallel port 1
03F0-03F7                         Diskette drive controller
03E8-03EF                         Serial port A
03F8-03FF                         Modem
0CF8                              PCI mechanism #1 configuration address
                                  register
0CFC                              PCI mechanism #1 configuration data 
                                  register
7400-740F                         Bus master IDE

(km-07/16/1997)