Epson EX-1

The first dedicated accounting computer to carry the Epson name

June 1977

Epson EX-1

CPU: Intel 8080 8-bit microprocessor
RAM: 20 KB
Keyboard: JIS keyboard with 48 keys for characters and a numeric pad (0 to 9)
Dedicated keyboard equipped with function keys
Display: 16 characters x 4 lines (total 128 characters: Alphanumeric/Japanese characters)
5 x 7 dot-matrix red plasma display
Line printer: Print speed: 84 lines/minute
Printing method: Belt impact
Characters per line: 80 columns
Paper width: 10 inches
Journal printer: For monitor lists
Floppy disk drive: 2 slots
Recording media: IBM3740-compatible, 8-inch disk
Storage capacity: 256KB/slot
Power supply: AC 90 to 110V 50/60Hz
Power consumption: 300 W
Dimensions, main unit: (W)950 x (D)680 x (H)845 mm
Weight: Approx. 100 kg

The year 1977 saw the debut of the Epson EX-1 dedicated accounting computer, billed as the world's smallest office computer. Output was performed using Epson's* M-2610 line printer, which came as part of the package. The M-2610 was capable of producing rapid printouts, and offered more vivid printing of characters than did serial printers. With this line printer at the heart of the system, character display and journal printer (EP-102) mechanisms were also provided. The machine was very easy to operate.

Another strong point was the software, which was developed on the basis of needs surveyed from accounting firms. The system was equipped with dedicated software capable of meeting the everyday needs that would arise in an accounting office.

In addition to representing Epson's first venture into the computer business, the Epson EX-1 also marked the first use of the Epson brand in an end-user-oriented product. In these respects, although only sold in Japan, it was a very significant product for the company.

*Then known as Shinshu Seiki Co., Ltd.