Kay 1024

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Russian clone of the ZX Spectrum

title: "Kay 1024" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["zx-spectrum-clones"] description: "Russian clone of the ZX Spectrum" topic_path: "general/zx-spectrum-clones" source: "https://en.wikipedia.org/wiki/Kay_1024" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Russian clone of the ZX Spectrum ::

::data[format=table title="Infobox information appliance"]

FieldValue
typeHome computer
release_date
cpuZilog Z80A
cpu_speed3.5 or 7 MHz
memory1024 KB
osTR-DOS
displayRGB monitor/ TV out; 256x192
developerNEMO
compatibilityZX Spectrum
soundBeeper, AY-3-8910
::

| image = | caption = | type = Home computer | release_date = | discontinued = | cpu = Zilog Z80A | cpu_speed = 3.5 or 7 MHz | memory = 1024 KB | os = TR-DOS | memory_card = | display = RGB monitor/ TV out; 256x192 | developer = NEMO | compatibility = ZX Spectrum | sound = Beeper, AY-3-8910

The Kay 1024 was a Russian ZX Spectrum clone introduced in 1998. Created by the NEMO company of St. Petersburg, it has 1024 KB of RAM. It was a rival to Scorpion ZS 256, having a slightly lower price. It offered a controller for a PC keyboard and HDD, but not for floppy disks (although available as an extension card). Adding a General Sound card was easy, and the CPU had a 7 Mhz turbo mode.

Earlier versions of the machine were known as Kay 128 and Kay 256.****

The Kay 2006 NB (North Bridge) is a 2006 version based on the Altera EPM7064 MAX. It adds three new graphics modes: Multicolor, GigaScreen and 512×192 pixels in 2 colors.****

The Kay 2010 or Kay 1024/SL4 is a 2010 update of the original KAY 1024 with a few minor additions and improvements.**** The Kay 2010 mainboards are manufactured in Chelyabinsk.****

Specifications

Brief technical specifications of KAY-1024 computer:

  • Supplied as a complete board, with a IS-DOS floppy disk, drivers and utilities, a ribbon cable and instructions (on a single sheet of paper). A 40 MB hard drive with the preinstalled operating system was an option.
  • 1024 Kb RAM (61 pages), usable as 256 Kb (7FFD 1FFD) plus a 640 Kb RAM disk in TR-DOS (virtual drive "C").
  • The Z80A 3.5 MHz CPU has no wait states and a 7 MHz turbo-mode. The turbo mode can be controlled by software, logical level on bus, or by an external button.
  • KAY-1024/3SL/TURBO motherboard with three slots for additional devices: floppy disk controller, IDE drive, IBM PC keyboard, modem, etc (no soldering needed).
  • Built-in hard drive support in ROM. IS-DOS may be loaded directly from hard drive, accessible from the computer main menu.
  • The IDE hard drive interface for Nemo-bus and IS-DOS can be used within TR-DOS.
  • IBM PC keyboard and mouse controller (Kempston mouse).
  • XTR-Modem, for Nemo-bus.
  • 5.25″ and 3.5″ disk drives.
  • "BETA-TURBO" floppy disk controller for Nemo-Bus.
  • Optional: AY-3-8910, Z84C0010PEC, Z84006PEC, ROM 27C512 with KAY-1024 ROM set, real-time clock IC "Dallas", ribbon cables for HDD and FDD; General Sound external sound card, Nemo-bus compatible; General Sound memory module.
  • Kempston and Sinclair joysticks.
  • Complete Centronics printer interface.

References

References

  1. "KAY Nemo Documentation".
  2. (2000). "KAY 1024 Schematic". NEMO.
  3. Szczepaniak, John. (April 2005). "Global Gaming". Retro Gamer.
  4. ZpiXel. (January 2002). "ZX-Spectrum graphics modes".
  5. "KAY 1024. Руководство по эксплуатации".
  6. Nemo. "ZX Spectrum demo Kay 1024 Information".
  7. "Sinclair – Nachbauten".
  8. "KAY-1024".
  9. "KAY".
  10. "KAY-2010".

::callout[type=info title="Wikipedia Source"] This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page. ::

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