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 Configuration program or application programs. The default values are highlighted.
| System Resource | IRQ | I/O Address (Hex) | Memory Address (Hex) | DMA Channel | | Audio Control base | None | 0538-053F, 0D38-0D3F, 0E88-0E8F, or 0FF0-0FF7 | None | None | | CD-ROM and DVD drive in Ultraslim Bay | 15, 14 | 0170-0177, 0376-0377, 01F0-01F7, or 03F6-03F8 | None | None | | Diskette controller | 6 | 03F0-03F7 | None | 2 | | Hard disk drive | 14 | 01F0-01F7 and 03F6-03F7 | None | None | | IDE hard disk drive or the IDE CD-ROM drive in the docking station | 15, 10, 11 | 0170-0177 and 0376-0377, 01E0-01E7 and 03E6-03E7, 01E8-01EF and 036E-036F | None | None | | Infrared port | 4, 3, or disabled | 03F8-03FF, 02F8-02FF, 02E8-02EF, or 03E8-03EF | None | 0 and 3 or disabled | | Joystick port | None | 0201 | None | None | | Keyboard | 1 | 0060 and 0064 | None | None | | Math co-processor exception | 13 | None | None | None | | MIDI | 5, 7, 10, 11, or disabled | 0330-0333, 0310-0313, 0320-0323, or 0330-0332 | None | None | | Modem | 10, 3, 4, 5, 7, 11, 15, disabled
- or -
3, 4 | 0130-013F, 0350-035F, 0770-077F, or 0DB0-0DBF
- or -
02F8-02FF, 03F8-03FF, 03E8-03EF, or 02E8-002EF | None | 7, 0, 1, or 6 | | Parallel port | 7 | 03BC-03BE (and 07BC-07BE (1)) | None | 0, 1, 3, or disabled (2) | | - | 7 | 0378-037F (and 0778-077A (1)) | - | - | | - | 5 | 0278-027F (and 0678-067A (1)) | - | - | | - | Disabled | Disabled | - | - | | PCMCIA controller | 11 | 03E0-03E1 (3) | CC000-CCFFF and CD000-CEFFF (3) | None | | Real-time clock | 8 | 0700-0071 | None | None | | Serial port | Disabled | Disabled | None | None | | - | 4 | 03F8-03FF | - | - | | - | 3 | 02F8-02FF | - | - | | - | 4 | 03E8-03EF | - | - | | - | 3 | 02E8-02EF | - | - | | Sound Blaster | None | 0220-0233, 0240-0253, 0260-0273, or 0280-0293 | None | 1, 0, 6, or 7 | | Timer | 0 | 0040-0043 | None | None | | TrackPoint or mouse | 12 | 0060 and 0064 | None | None | | Video controller | None | 03BA, 03B4-03B5, 03C0-03CF, 03D4-03D5, 03DA | A0000-BFFFF
C0000-C9FFF | None | | WSS codec base | 5, 7, 9, 10, 11, 15 | 0530-0537, 0604-060B, 0E80-0E87, or 0F40-0F47 | None | 0, 1, 3 |
Note:
(1) The I/O address in parentheses are used also when ECP is enabled as the printer operating mode from the ThinkPad Configuration program.
(2) When you enable ECP as the printer operating mode from the ThinkPad Configuration program, you must select one value from the four selections including "disabled".
(3) When you use Windows 95 OSR2, do not assign this I/O addresses. |
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