Technical information

Avoiding Hardware Conflicts
The following table summarizes the reserved system resources for
the computer and the ThinkPad Dock I or Dock II. Values in
parentheses are alternative values that are selectable in the
ThinkPad Features program, Easy-Setup, or application programs.
System Resources IRQ
Memory
Address (Hex) I/O Address (Hex)
DMA
Channel
Timer 0 None 0040–0043 None
Keyboard 1 None 0060, 0064 None
Serial port 1 4 (or disabled) None 03F8–03FF (or 02F8–02FF) None
Serial port 2 3 (or disabled) None 02F8–02FF (or 03F8–03FF) None
Serial port 3 4 (or disabled) None 03E8–03EE (or 02F8–02FF) None
Serial port 4 3 (or disabled) None 02E8–02EF (or 03F8–03FF) None
Parallel port 1 7 (or disabled) None 03BC–03BE None
Parallel port 2 7 (or disabled) None 0378–037A None
Parallel port 3 5 (or disabled) None 0278–027A None
Infrared port 4 (or 3, 5, 10, 11,
15, disabled)
None 01A0–01A7 (or 01B0–01B7,
01C0–01C7, 01D0–01D7)
02E8–02EF (or 03F8–03FF,
02F8–02FF, 03E8–03EF)
0 and 3
or
disable
Diskette controller 6 None 03F0–03F7 2
Video controller 9 A0000–BFFFF 03B4–03B5, 03BA,
03C0–03C9, 03CA, 03CC,
03CE–03CF, 03D4–03D5,
03DA
2DF0, 2DF1, 46E8
None
Mwave DSP device 5 (or 7, 10, 11,
15, disabled)
None 0030, 4E30, BE30, CE30 0 (or 1,
6, 7)
Sound Blaster 7 (or 5, 10, 11,
disabled)
None 0220, 0240 0 (or 1,
6, 7)
MIDI None None 0300, 0330 None
Modem 3, 4, disabled None 03F8, 02F8, 03E8, 02E8 None
Hard disk drive 14 None 01F0–01F7, 03F6–03F7 None
PCMCIA controller None None 03E0–03E3 None
PC Card (Depends on the
type of PC Card)
C0000–DFFFF None None
Real-time clock 8 None 0070–0071 None
TrackPoint III or
mouse
12 None 0060, 0064 None
Math coprocessor
exception
13 None None None
228 IBM ThinkPad 755CX User's Guide