, using a voltage regulator to keep the delicate 5V rails steady. The First Boot
It divided a 14 MHz master clock down to 3.5 MHz for the Z80 CPU. How to Design Your Own Retro Microcomputer , using a voltage regulator to keep the
The ULA continuously sweeps through a specific Using Verilog or VHDL, you can implement open-source
If your goal is absolute cycle-accurate precision, a is the gold standard. Using Verilog or VHDL, you can implement open-source system-on-chip clones (such as the ZX Uno or the ZX Spectrum Next architecture). Instead, you are greeted by a surprisingly empty board
Designing a "modern" version of this architecture typically involves one of three paths:
448 clock cycles long (including active video, border, blanking, and sync pulses).
If you open up a Sinclair ZX Spectrum, you might expect to find a motherboard sprawling with chips—CPU, RAM, ROM, video logic, and sound circuits. Instead, you are greeted by a surprisingly empty board. The magic lies in one mysterious, black chip sitting smack in the center: the