Ivel Ultra

Ivel Ultra

Ivel Ultra Model 2
Developer	Branimir Makanec
Manufacturer	Ivasim Electronika
Type	Home computer
Generation	8-bit
Release date	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

The Ivel Ultra is an 8-bit Croatian Apple II compatible computer designed by Branimir Makanec and developed by Ivasim Electronika in the 1984s.[1][2][3][4][5][6]

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.

Ivel Ultra model 1

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)

References

1. Telegram.hr. "Možda ovo niste znali, ali nekad smo proizvodili dosta divne kompjutere. Evo malog podsjetnika na najbolje". Telegram.hr (in Croatian). Retrieved 2021-01-10.
2. "Ivel Ultra Ivasim elektronika". www.old-computers.com. Retrieved 2023-03-30.
3. Cicvarić, Božo. "Ivel Ultra". European Young Engineers Croatia (in Croatian). Retrieved 2023-03-30.
4. "HCM: East-European Home-Computer ..." www.homecomputer.de. Retrieved 2023-03-30.
5. "ivel ultra (retro računalo)". www.njuskalo.hr (in Croatian). Retrieved 2023-03-30.
6. Bodrato; Caruso; Cignoni (2018). Discovering Eastern Europe PCs by Hacking Them … Today (PDF). IFIP International Conference on the History of Computing (HC). pp. 6, 14.