The figure below shows the memory map for a correctly functioning system. Memory can be mapped differently if POST detects an error in system board memory or TR/CMOS RAM. In the figure, the variable x represents the number of 1-MB blocks of system board memory starting at or above the hex 100000 boundary.
| Hex Address Range | Function | | 00000000 to 0009FFFF | 640-KB system board RAM | | 000A0000 to 000BFFFF | Video RAM | | 000C0000 to 000C9FFF | System board video BIOS mapped to RAM | | 000C8000 to 000EFFFF | Channel ROM | | 000F0000 too 000FFFFF | 64-KB system board ROM mapped to RAM | | 00100000 to (00100000 + x MB) | x MB sysstem board RAM | | FFFF0000 to FFFFFFFF | 64-KB system board ROM (same as 000F0000 to 000FFFFF) |
The following summarizes the available system resources for the computer. Values in parentheses are alternative values that are selectable in the ThinkPad Features program or application programs. The default values are in bold.
| System Resources | IRQ | I/O Address | Memory Address | DMA
Channel | | Timer | 0 | 0040-0043 and
0048-004B | none | none | | Keyboard | 1 | 0060 and 0064 | none | none | | Serial Port | 4
3
4
3
disabled | 03F8-03FF
02F8-02FF
03E8-03EF
02E8-02EF
disabled | none | none | | Parallel Port | 7
-
7
5
disabled | 03BC-03BE* (and 07BC-07BE)
0378-037F * (and 0778-077A)
0278-027F * (and 0678-067A)
disabled* | none | 0,1,3 or disabled
** | | Infrared Port | 4,3 or disabled | 03F8-03FF, 02F8-02FF, 02E8-02EF, or 03E8-03EF | none | 0 and 3 or disabled | | Diskette Controller | 6 | 03F0-03F7 | none | 2 | | Video Controller | none | 03BA,03B4-03B5,
03C0-03CF, 03D4-03D5, 03D8-03D9, 03DA, 2100-21FF, 2200-2203, 2300-2323 | A0000-BFFFF and C0000-C9FFF | none | | Enhanced Video/MPEG (for the Enhanced Video model ) | 11,3,4,5,7, 9,10,15, or disabled
*** | none | Automatically set by the system **** | none | | (For models with the internal modems only) ThinkPad Modem | 10,5,7,11, 15, or disabled | 0130--013F, 0350-035F, 0770-077F or 0DB0-0DBF | none | 7,0,1, or 6 | | Sound Blaster | none | 0220-022F, 0240-024F, 0260-0273 or 0280-0293 | none | none | | MIDI Port | 5,7,9,10, 11,15 or disabled
***** | 0330-0332, 0300-0302, 0310-0313, or 0320--323 | none | none | | Joystick Port | none | 0201 | none | none | | WSS codec base | 5,7,9,10,
11,15 | 0530--0537, 0604-060B, 0E80--E87, 0F40-0F47 | none | 0,1,3 | | Control base | none | 0538-053F, 0D38-0D3F, 0E88-0E8F, 0FF0-0FF7 | none | none | | Hard Disk Drive, CD-ROM Drive, (for the CD-ROM Drive model), or Hard Disk in the UltraBay | 14 or 15
****** | 01F0-01F7 and 03F6, F000-F007 or 0170-0177 and 0376 | none | none | | PCMCIA Controller | 11 | 03E0-03E1 (Docking Station's PC Card slots: 03E2-03E3) | none | none | | Real Time Clock | 8 | 0070-0071 | none | none | | TrackPoint III or mouse | 12 | 0060 and 0064 | none | none | | Math Coprocessor Exception | 13 | none | none | none |
* Addresses in the parentheses are also used when ECP is enabled by the ThinkPad Configuration program as the printer operating mode.
** When you enable ECP as the printer operating mode by ThinkPad Features program, one of the choices (including "disabled") must be selected.
*** The enhanced video features and the PCI adapter card in the SelectaDock docking system share the same IRQ11.
**** Memory address higer than the system memory will be automatically set by the system.
***** Sound Blaster and MIDI share the same IRQ.
****** IRQ15 and I/O 0170-0177 and 0376 are applicable to the UltraBay II devices only. |
|
Cart
Loading... Please Wait...
