Orion-128

Overview

Technical specifications

• CPU: KR580VM80A clocked at 2.5 MHz.
• RAM: 128 KiB in original version, expandable to 256 KiB. A bank switching scheme was used.
• ROM: 2 KiB contains monitor firmware
• Video: three graphics modes with the same image resolution 384 × 256 pixels. Text can be displayed using 64 columns × 25 rows of characters. Images for the upper case Cyrillic and Latin characters in KOI-7 N2 encoding are built in the Monitor ROM. List of graphics modes includes:
• * monochrome mode
• * 4 color mode
• * 16 color mode
• Storage media: cassette tape, ROM drive. In later years a floppy disk controller and an ATA hard disk controller were developed
• Keyboard: 67 keys. The keyboard matrix is attached via programmable peripheral interface chip KR580VV55 and scanned by CPU