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Epson HX- 40/PX-4

Manufacturer Epson
Model HX-40 (Also PX-4)
Date Announced 1985
Date Canceled Unknown
Number Produced Tens of thousands
Country of Origin Japan
Price Unknown
Current Value $25+
Processor Z80 compatible
Speed ~4 MHz
Storage Optional micro cassette tape.
Expansion Optional expansion for RAM, etc.
Bus Proprietary
Video 40x8 character LCD
I/O Cassette, optional interfaces including modems, etc.
OS Options Built-in BASIC
Notes The HX-40/PX-4 was the successor to the Epson HX-20. It offered more RAM, more in ROM and a tilt screen borrowed from the Epson Geneva PX-8.
Related Items in Collection Epson HX-20 Portable Computer, Epson Geneva PX-8 Portable Computer.
Related Items Wanted Cassette interface, additional peripherals, ROMs, manuals, software.

The Epson HX-40 is also known as the PX-4 and was an upgrade from the wildly popular Epson HX-20 Portable Computer.

The machine in my collection works perfectly and came with several peripherals including an acoustic coupler modem and a RAM disk pack.

Epson RAM disk
Epson cx-20 modem

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