IBM PS/55 Note
The IBM Personal System/55 Note is a series of notebooks manufactured by the IBM subsidiary IBM Japan as part of the IBM Personal System/55 series.
Machine type 5523 were designated as 'notebook' computers distinct from type 5535 which were larger 'laptop' multistation computers.
The international IBM PS/2 Note series was based on the PS/55 Note series and used the ISA bus.
History
IBM started selling the PS/55 Note series in Japan in April 1991.Western Digital has supplied video and logic chips for the PS/55 Note.
The second generation notes had an N model number signifying 'Notebook'. The third and fourth generation notes changed to C for 'Colour' and M for 'Monochrome'.
Models
The prices for the PS/55 Note varies between and.- Model 'note' was the first release with a 12Mhz 80386 CPU.
- Model N23/N33 SX was the second generation note with 16Mhz 80386 CPU.
- Models M23V and C23V joint-third-generation and first TFT option note, but without a Trackpoint.
- Model C52 was a fourth and final generation note identical to the ThinkPad 700C with MCA bus.
- Model T22sx was an offshoot machine with detachable tablet and keyboard machine.
- Model N27sx was not a notebook and forerunner of the PS/2 CL57SX model.