Ivel Ultra
Croatian personal computer
From Wikipedia, the free encyclopedia
The Ivel Ultra is an 8-bit Yugoslav Apple II compatible computer designed by Branimir Makanec and developed by Ivasim Electronika in the 1984s.[1][2][3][4][5][6]
Ivel Ultra Model 2 | |
| Developer | Branimir Makanec |
|---|---|
| Manufacturer | Ivasim Electronika |
| Type | Home computer |
| Generation | 8-bit |
| Released | 1984 |
| Discontinued | 1990 |
| Operating system | IDOS, CP/M (with second Z80 CPU) |
| CPU | MOS Technology 6502 at 1 MHz |
| Memory | 64 KB |
| Removable storage | 5.25" floppy disks |
| Display | 280 x 192 pixels, 6 colors |
| Backward compatibility | Apple II |
It was produced in two different versions: the first version has a brown case and ran from 1984 to 1986, the second has a white case and ran from 1987 to 1990.
The machine was equipped with one or two 5.25" floppy disk drives. It came with an Apple I compatible BASIC language.[2] The operating system, called IDOS, is compatible with Apple DOS 3.3.
The Ivel Ultra could be equipped with a second Zilog Z80 processor, in order to offer compatibility with the CP/M operating system.

Specifications
- CPU: MOS Technology 6502 at 1 MHz
- ROM: 12 KB (BASIC language interpreter and machine language monitor)
- RAM: 64 KB
- Graphic mode: 280 x 192 pixels, 6 colors
- Text mode: 40 x 24
- Operating system: IDOS, compatible with Apple DOS 3.3, CP/M (with an added Z80 CPU)