Sizif-512 is a modern replica of the ZX Spectrum 48+/128/+2/+3 computer, featuring SD card support, esxDOS, a joystick port, and more. It runs on a real (non-emulated) Z80 processor, an AY-3-8910 sound chip, and a programmable CPLD acting as the ULA. The Sizif-512 project is a more modern version of the Harlequin 128. Sizif-512 is the motherboard for the ZX Spectrum Neo computer.

The kit includes a complete set of parts for DIY assembly. The five most challenging components are pre-soldered, and those requiring programming are pre-programmed. This saves you from soldering the trickiest parts or needing programmers.

The kit includes:

assembly instructions
PCB board and a full set of components for assembly
pre-soldered and programmed CPLD EPM1270T144, pre-soldered SN74CB3T3245PW
SST39SF040 – programmed ROM
SD card with pre-loaded esxDOS system, hundreds of demos and music

The kit does NOT include the ZX Spectrum case shown in the photos!

To get the system running, you’ll also need at least:

9V power supply
TV or monitor with SCART or RCA input, or an HDMI converter
SCART cable or RCA cable
a keyboard in the form of a membrane, a complete ZX Spectrum case, or another type

And for the full experience:

Sizif-512 project page with documentation: https://github.com/UzixLS/zx-sizif-512
More about Sizif-512 and ZX Spectrum Neo: https://mumio.dev/?page_id=320

Note:
AY-3-8910 chips and Z80 processors are no longer manufactured. Those supplied in the kit come from various sources and may not be brand new, but each is tested before shipping. The kit includes an 8 MHz Z80 NMOS processor.

Assembling and starting this kit requires an advanced level of electronics knowledge. We do not provide assistance with getting the kit running. If you can’t get your assembled kit working, we recommend our setup service, available via this link.