Sharp MZ-80K2
 | |
| The MZ-80K, the kit model that the MZ-80K2 replaced as a factory-built machine (Wolfgang Stief, CC0). No freely licensed photograph of an MZ-80K2 has been found. | |
| Specifications | |
|---|---|
| Manufacturer | Sharp Corporation |
| Type | Personal computer |
| Released | 1980 (Japan)[1] |
| Intro price | ¥198,000[1] |
| CPU | Zilog Z80 at 2 MHz[1][2] |
| Memory | 32 KB RAM as standard[1] |
| Storage | Built-in cassette recorder[1] |
| Display | Built-in monochrome CRT, 40 × 25 characters[1] |
| Sound | — |
| Power | 100 V AC 50/60 Hz (Japan)[1] |
| OS / Firmware | — |
| Predecessor | Sharp MZ-80K |
| Model no. | MZ-80K2; MZ-80K2E |
The Sharp MZ-80K2 is a personal computer that Sharp Corporation sold in Japan from 1980 as a factory-assembled version of the Sharp MZ-80K, which had been sold as a semi-kit. It has 32 KB of RAM as standard and, as far as software is concerned, is almost identical to the MZ-80K.[1][2] Like the MZ-80K it has the keyboard, a monochrome monitor and a cassette recorder in one case.[1] A cheaper version, the MZ-80K2E, followed in 1981.[1]
Differences from the MZ-80K
[edit | edit source]The Japanese Wikipedia article lists the changes from the MZ-80K:[1]
- Sold assembled, at the same price as the MZ-80K kit, 198,000 yen.
- 32 KB of RAM as standard, against 20 KB on the MZ-80K.
- A paler colour around the CRT, a redesigned surround for the keyboard, and key caps with a matt finish.
Sharp offered a typewriter-layout keyboard, the MZ-80TK, as an option for the MZ-80K2. The standard keyboard has the MZ-80K's grid layout.[1]
MZ-80K2E
[edit | edit source]The MZ-80K2E of 1981 was a cheaper MZ-80K2, priced at 148,000 yen, and also had 32 KB of RAM. It has green trim around the CRT, white key tops and two single-colour LEDs in place of the K2's two-colour LED. Its CPU is soldered directly to the board, without a socket.[1][2] On the MZ-80K, by contrast, all the major chips are in sockets.[3]
Hardware and documentation
[edit | edit source]SharpMZ.net lists a Japanese owner's manual for the MZ-80K2 but no service manual.[4] The nearest service document is Sharp's English Sharp MZ-80K Service Manual, which covers the European MZ-80K with its 220 V and 240 V power supplies.[5] The MZ-80K2 is a 100 V Japanese machine, so its power supply is not the one in that manual.[1][5] No published source compares the K2's CPU board with the MZ-80K's. Before using the MZ-80K manual's drawings and parts list on a K2, check the board's designators and chip types against them.
Repair guides
[edit | edit source]- Sharp MZ-80K2 General Maintenance
- Sharp MZ-80K2 Troubleshooting Guide
- Sharp MZ-80K2 Capacitor Replacement Guide
The MZ-80K pages hold Sharp's procedures for the MZ-80K: Sharp MZ-80K General Maintenance, Sharp MZ-80K Troubleshooting Guide and Sharp MZ-80K Capacitor Replacement Guide.
Related pages
[edit | edit source]References
[edit | edit source]- ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 1.11 1.12 1.13 MZ-80, Wikipedia (Japanese)—link(accessed 2026-10-21) MZ-80K2: released 1980; sold assembled, not as a kit, as the low-end model; nearly equivalent to the MZ-80K as seen by software; 32 KB RAM as standard; paler colour around the CRT; redesigned keyboard surround; key caps with a matt finish; 198,000 yen. MZ-80TK typewriter-layout keyboard offered as an option for the MZ-80K2. MZ-80K2E: released 1981 as a cheaper MZ-80K2 to mark 100,000 "clean computers" sold; 32 KB RAM; green around the CRT; white key tops; two single-colour LEDs in place of a two-colour LED; CPU soldered to the board without a socket; 148,000 yen. MZ-80K series basic specifications: Z80 at 2 MHz; up to 48 KB main RAM, 1 KB text VRAM; 2 KB character ROM, 4 KB monitor ROM; built-in monochrome display, 40 × 25 characters; AC 100 V ±10 % 50/60 Hz; 410 × 470 × 270 mm.
- ↑ 2.0 2.1 2.2 MZ (コンピュータ), Wikipedia (Japanese)—link(accessed 2026-10-21) MZ-80K series: CPU Z-80 (LH0080) at 2 MHz; MZ-80K2 released 1980 as the assembled version of the MZ-80K with 32 KB RAM, 198,000 yen; MZ-80K2E released 1981, 32 KB, cheaper version of the 80K2, CPU soldered directly to the board without an IC socket, 148,000 yen.
- ↑ Maurice Hawes, "A Brief History of the MZ-80K", SUC Magazine, November 1999, vol. 19 no. 3, p. 7, reproduced at A Brief History of the MZ-80K, SharpMZ.net—link(accessed 2026-10-21) The MZ-80K has all its major chips in sockets.
- ↑ MZ-80K Manuals, SharpMZ.net—link(accessed 2026-10-21) Lists the "Japanese Manual MZ-80K2", the "Japanese MZ-80C Manual" and the MZ-80K Service Manual among the MZ-80K manuals.
- ↑ 5.0 5.1 Sharp Corporation, Service Manual, Personal Computer MZ-80K (File:Sharp MZ-80K Service Manual.pdf), specifications, printed pages 1 and 2 (PDF pages 3 and 4): AC 220 V ±10 % 50 Hz, AC 240 V ±10 % 50 Hz for the UK; power supply units DBOXD0004PAZZ and DBOXD0005PAZZ; CPU board DCPU-0006PAZZ.