IBM PS/2 Note N33 SX
The IBM PS/2 Note N33 SX is a 386-based laptop that was released in June 1991. It was the first laptop in the PS/2 Note line, and the first notebook computer marketed by IBM in the United States. Unlike later models in the PS/2 Note series, the N33 SX is based on the ISA Bus, not Microchannel.
The 12MHz and 16MHz versions look near identical from the outside, but are constructed completely differently internally. The 12MHz version is based on the original Japanese PS/55 note model, while the 16MHz version is based on the PS/55 note N23 SX. The 12MHz version lacks space for both a floppy and hard drive internally, so models with a hard drive do not have an internal floppy drive. The 12MHz version also lacks a video output.
Specifications
| Spec | PS/2 Note N33 SX (12MHz) | PS/2 Note N33 SX (16MHz) |
|---|---|---|
| Release Date | June 1991 | |
| CPU | CPU Type: Soldered QFP Intel 386SX @12MHz | CPU Type: Soldered QFP Intel 386SX @16MHz |
| Chipset | Western Digital WD76C10 | |
| RAM | Type: 1x 72-pin SIMM slot Standard: 2MB Soldered Maximum: 6MB | Type: 1x 72-pin SIMM slot Standard: 2MB Maximum: 6MB |
| Storage | 2.5" IDE Requires Adapter: Unknown Standard: Optional | 2.5" IDE Requires Adapter: Unknown Standard: 40 or 80MB |
| Display Options | 9.5" Passive Matrix Grayscale LCD @640x480 | 9.5" Passive Matrix Grayscale (16 shades) LCD @640x480 |
| Graphics Chipset | Western Digital WD90C20 VRAM: Unknown | |
| Audio | PC Speaker | |
| Main Battery | NiCad | |
| CMOS Battery | - Lithium CMOS Battery (Barrel) - NiCad Reserve Battery (Stick) | Unknown |
| Power Supply | Barrel Jack | Unknown |
| Media Drives | Internal 3.5" 1.44MB Floppy Drive on models with no hard drive, otherwise external | 3.5" 1.44MB Floppy Drive |
| PC Cards | None | |
| Networking | None | |
| Other I/O | - 1x Parallel - 1x Serial - 1x PS/2 - 1x Expansion Bus Port | - 1x Parallel - 1x Serial - 1x VGA Out - 1x PS/2 - 1x Expansion Connector |
| BIOS | IBM | |
| Pointing Device | None | |
Resources
| Link | Details |
|---|---|
 |
IBM PS/2 Note N33 SX Drivers |