Screenshots from IBM DOS J4.05
This is IBM DOS Version J4.0 (5605-PAA) for IBM PS/55. It requires IBM's Japanese layout keyboard and the (Japanese) Display Adapter connected to the MicroChannel bus. Thus, it cannot run on other IBM-compatible PCs.
Install Program
DOS Shell
The DOS Shell of this version runs in PS/55 text mode only.
BASIC interpreter
In PS/2 (English) mode
DOS Shell
Command Prompt
Advanced BASIC (IBM BASIC Version A4.00)
This requires IBM Cassette BASIC in system's ROM.
