PS/2 Model L40 SX
The PS/2 Model L40 SX is not a ThinkPad, but the first foldable IBM notebook - and thus (alongside the PS/Note) a direct predecessor of the ThinkPad brand. The device was launched in 1991 and already featured some of the design elements of later ThinkPads - such as the clamshell lid and the status LEDs below the screen.
One striking feature is an almost full-size keyboard (there was an optional external numeric keypad), above which unused case space can be seen. This space could be filled with appropriately cut templates - for example, if the keyboard layout does not match the one actually configured in the operating system.
The model has a battery, which is missing on my device, as well as a CMOS and standby battery. The latter is supposed to back up the contents of the RAM when the notebook is in power-saving mode.
I received my device as a gift when I was clearing out my flat. One of the cover flaps is missing, otherwise the device is functional. It is difficult to obtain a new BIOS battery as there are no spare parts available.
Technical data
| Component | Property |
|---|---|
| Type | 8543-045 |
| CPU | Intel 80386SX (20 MHz, no cache) |
| RAM | 4 MB EDO (PC-???) |
| graphics card | ??? (??? MB memory) |
| Display | 10" TFT (640x480, monochrome) |
| Hard drive | 80 MB IDE (2.5") |
| Operating system | IBM DOS 5.0, Windows 3.1 |
| Sound | - |
| USB | - |
| Modem | - |
| LAN | - |
| WLAN | - |
| Bluetooth | - |
| Floppy | 1.44 MB IDE |
| CD/DVD | - |
| Card reader | - |
| Expansion cards | - |
| Interfaces | Docking port, VGA, RS232, LPT, PS/2 |
| Battery | ??? |
| Size | 325x270x56 mm (WxHxD) |
| Weight | 3.49 kg |
Special features:
- ???
Diagnostic outputs
# lspci
TODO
# cat /proc/cpuinfo
TODO