A weblog focused on interesting circuits, ideas, schematics and other information about microelectronics and microcontrollers.
E-books
Disclaimer
Because I have not tested all electronic circuits mentioned on this pages, I cannot attest to their accuracy; therefore, I do not provide a warranty of any kind and cannot be held responsible in any manner.
ZXGate - old computers in new FPGAs
10. January 2009 - 12:08 — admin
Four vintage computers in one FPGA: ZX81, ZX Spectrum, Jupiter ACE and TRS80 implemented in the VHDL.
Project is based on Bodo Wenzel's ZX97 - a FPGA clone of the ZX81. The original plan was to use a real Z80, separate memory chips and the ZX97 ULA replacement. Instead the entire ZX81 was implemented in one FPGA! Since then three more systems have also been implemented.
All FPGA implementations have been done in VHDL and the source code can be downloaded.