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PS/2  Flag was designed by
Louis Ohland 
Personal System /55  

 

 Multistation 5550. 
   Maintained by Mr.Tahara
Last update  2004.09.18. 
  Update History 
  

   since 2002.09.07

INDEX 
Still Crazy
   Monologue, a sort of... 


PS/55 At a glance
PS/55 Diagram

History of  PS/55 
DOS/V 
xxx0 or xxx1  model number

Clock Up

Pictures   Japaneseque 

Adapters
Trash, but important
Links  not so many

Japanese Tips
   ( for Japanese readers, if any ) 

  Systems
 5550  386
 5550  486
 5540
 5510
 5521-Y 
 5530
 5538  PS/55E
 5535 
 5545 
 5560
 5570
 5580

 PC Series
 6860  PC720 
 6886  PC750 

 

 Processor Complex
PS/55 Complex ID Matrix

SCSI
IBM SCSI /A 

Video
PS/55 DISPLAY ADAPTER
SVGA with Cirrus video chip

Keyboard 
5576 keyboard  

Model M and others
  mainly written in Japanese 

Reply
PowerBoard

GETA , Interposer
 For 486 System
 For 386  System
 For Pentium Class 

IC DRAM CARD
 

 PS/55 is a name for Microchannel computers once sold by IBM Japan. Some models were analogous to PS/2 and the others were designed by IBM Japan and sold mainly inside Japan. 
Main purpose of this site is introducing Japanese unique MCA computers and adapters to Non Japanese MCA freaks.  Japanese readers who want to know about PS/55s,  I recommend you to visit FIBMJ Message Bulletin Board  #4,  PS/55 & PS/2, held by @Nifty.  The bulletin board #4 is seemed to be inactive now, but you  can get  log files in LZH format.     As far as I can see,  the Big Blue Japan does not provide any  information about their great products. 

 All information stored in following pages are mostly based on my experiences and information from various  members of @Nifty MCA Forum.  Please keep in mind that I'm not an engineer nor a programmer, hence  there would be some,  or many, misunderstandings about MCA and computers.. 
I'm not responsible for any damage or any inconvenience brought through the information written in my pages.

Image of this site has been stolen from the web site created by Louis Ohland,  an incredible MCA man. 
For detailed  information about PS/2, check his web site which is now mirrored by many MADs.  If you  need basic and general information about MCA,  check Peter Wendt's Web site.  If you need more information or reference images for any specific PS/55 models, please feel free to email  me  ( unspam adjustment needed ). 
 
 



Great thanks to All members of the Bulletin Board #4 in FIBMJ @Nifty.
and

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