POS System   As IBM had put power also into the field of POS very well, also in PS/55 of MCA,   the adapter existed.   I want to explain a multi-station generation's POS system.  4680 Store System  4692 POS Workstation  4680 Store System     This is the system which combined the POS terminal and the multi-station as     a controller.     However, it is not the usual multi-station. It is the machine of exclusive use of     the name of a 4681 Store controler.     The upper figure is a composition figure of a system.     It is the features to have loop type topology and that there are two controlers     and backup is taken automatically.     A network is called a store loop. Speed is 38.4KBPS.     As for between Controlers, synchronous processing is always taken.     Even if an obstacle occurs in one set, it can work normally  at one set.     At the time of recovery, a synchronization is automatically restarted by     automatic recovery processing.     In addition, if PS/55 are connectable as a terminal, it has become.     However, it is not known what kind of adapter and software were required for.   4681 Store controler     Appearance is a multi-station as it is. It is thought that 5560 is  probably     a prototype. Store Contorer Memory  2.6MB  (type A01/B02)                 2.6MB - 13.6MB (type B03/C03) Diskette  1.2MB Disk        20MB (type A01)                 40MB (type B02/B03)                 70MB (type C03) Store Loop Adapter (MAX 2) Transfer rate 38.4KBPS Terminal      MAX 64 Terminals / Store Loop                      (IBM4682, 4692, PS/55) Host Comunication Adapter(SDLC)                                                 (BSC) Transfer rate 9,600BPS Transfer rate 2,400BPS Store Controler Communication Adapter Transfer rate 187.5KBPS Store Controler Communication Cable Length 3.0m Asynchronous Communication Adapter (RS-232C) Transfer rate 2,400BPS Keyboard 5556-001 / P01 Multi-item input keyboard (for 4681) 10Key                            11Keys Function Key                 61Keys Item Key                        160Items / Page Pages                           20Pages           Page Collection Key   20Keys Display 5555-B01 / B05 / B06 Printer Printers for PS/55     A multi-item input keyboard is a keyboard which can be inputted now by     one-touch by registering a brand name and a unit price into a touch-type     keyboard. Page Top  4692 POS Workstation     Although it can consider only by seeing a photograph at least in the POS terminal     where a screen is large,     it is not the machine of only that as the name of a "workstation".     It is the POS terminal which can be used also as a personal computer in fact.     Since CPU is not known, it does not turn out that the personal computer used as     a base says which model it is.     In spite of being a screen of 9 inches, it seems to be that a 24-dot display is     uncanny.     When using it as a personal computer, the cover put upwards stuck so that it might     not waver by the keyboard.     However, since a keyboard layout completely differs from usual, troubles are likely     to be suffered when using it.     Since various options are attached, it is not troubled by the time of use as a usual     personal computer.     The thing with many options of a communication system thinks that it is a reason     that it is a POS terminal.     If the photograph which attached the option is seen, it will be convinced that it is     the personal computer which can be used as a POS terminal. Page Top Index