This computer is the successor of the HX-20.
The main cosmetic difference is a wider screen that can be adjusted to the right angle.
There are 2 ROM slots under the machine to implement additional ROM programs.
On the right of the LCD display can be plugged a tape-recorder, a plotter, RAM expansions etc.
A lot of peripherals were available for this computer in japan.
The PX-4 was logically followed by the PX-8.
Our model: H401G Code UA
Other Systems Related To Epson PX-4B:
This exhibit has a reference ID of CH1330. Please quote this reference ID in any communication with the Centre for Computing History.