In April 1981, NEC announced a new family of computers comprised of the NEC System 20/25 and 5 other models. This family covered a wide range while retaining the same basic software -- from the personal computer high-end, to the general-purpose small computer low-end.
These products had the following main features:
1) The bottom-end model, the NEC System 20/25, had the capabilities of an office computer(*), combined with the ease-of-use of a personal computer. In addition to the standard keyboard, it was also equipped with a touch keyboard enabling one-touch item input.
- *: An office computer is a small business computer specialized in office operation.
3) To enhance Japanese language processing capabilities, these products offered: a Japanese language printer (60 lines/min (24x24 dot), or 100 lines/min (18x18 dot)), a Japanese language serial printer (70 char/second (18x18 dot)), a Japanese language CRT display (1,000 char (color, monochrome)), a format overlay function, and kanji (Chinese character) dictionary files for finance/accounting, payroll, sales management and production management.
| Item | NEC System 20/25 | NEC System 50/35 | NEC System 100/45 | NEC System 100/85 | NEC System 150/55 | |
|---|---|---|---|---|---|---|
| Announcement | April 1981 | |||||
| Central processing unit | Max. memory capacity | 48KB (Note 1) | 48KB (Note 1) | 512KB | 768KB | 1,024KB |
| Arithmetic element | MOS LSI | Bipolar LSI | ||||
| Display station | Standard processing | Alphanumeric and kana, 2,000char (80char x 25line), 120 kanji | ||||
| Japanese processing | - | Kanji 1,000char (40char x 25line), 640char (40char x 16line) Alphanumeric and kana 2,000char (80char x 25line), approx. 8,000 different characters |
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| Floppy disk | Capacity | 1MB/drive | ||||
| Number connected | Max. 4 | Max. 3 | Max. 4 | 2 | ||
| Magnetic disk | Capacity¾ | - | 19MB/disk | 19/31MB /disk |
31/64MB /disk |
64MB/disk |
| Number connected | 1 | 2 | 4 | 4 | ||
| Magnetic tape | Cartridge type | - | - | 1/4inch width, 4track/tape | ||
| Reel type | - | - | 1/2 width, 9track/tape x2 | |||
| Serial printer | Standard processing | 35char/s, 100char/s | 35char/s, 100char/s, 200char/s | |||
| Japanese language processing | - | 70char/s | ||||
| Line printer | - | - | 100line/min, 200line/min | 100line/min, 400line/min, 530line/min, 200line/min, 420line/min (for OCR) | ||
| Japanese language printer | - | 60line/min, 100line/min | ||||
| Operating system | ITOS-1(N) | ITOS-1(N) ITOS-4 |
ITOS-4 | |||
| Language | Package created with COBOL-4 and SMART | COBOL-4 SMART |
High-level COBOL, COBOL-4 SMART, FORTRAN |
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Note 1: User area
