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References
- ↑ Zilog MCZ 1/20 Z80 system
- ↑ ZDS-1 Series [ dead link ]
- ↑ Zilog Z-80 Microcomputer System
- 1 2 Z80-RIO OPERATING SYSTEM USER'S MANUAL
- ↑ Z80-RIO Text Editor User's Manual [ dead link ]
- ↑ Z80-RIO Product Specification [usurped]
- ↑ "Betriebssystem UDOS" (in German). robotrontechnik.de. 2018-01-03. Retrieved 2019-05-06.
- ↑ P8000
