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An FPGA Calculator

Apr 26, 2026 A Calculator (1): Introduction
Apr 20, 2026 A Calculator (2): Pathfinding
Apr 20, 2026 A Calculator (3): Practical Numerical Methods
Apr 20, 2026 A Calculator (4): The Framework
Apr 20, 2026 A Calculator (5): The Hardware
Apr 23, 2026 A Calculator (6): Designing the CPU
Apr 20, 2026 A Calculator (7): Writing Microcode for a CPU You Just Invented
Apr 20, 2026 A Calculator (8): From Dev Board to a Real Device
Apr 26, 2026 A Calculator (9): Chasing the Last Digit
Apr 26, 2026 A Calculator (10): It Works!

Z80 Explorer

Sep 11, 2024 Z80 Explorer
Jan 21, 2025 Z80 Explorer v1.06 released

The A-Z80 CPU

Feb 23, 2026 The A-Z80 CPU
Feb 6, 2025 A Z80 From the Ground Up
Feb 6, 2025 A Z80 : The Heart
Feb 6, 2025 A Z80 : The Mind
Feb 6, 2025 A Z80 : The Soul
Feb 6, 2025 A Z80 : References
Feb 23, 2026 Z80 Library

GitForce

Feb 27, 2026 GitForce
Jul 1, 2025 GitForce – Workspaces
Jul 1, 2025 GitForce – SSH
Jul 1, 2025 GitForce – Custom Tools

PCB Making

Nov 9, 2021 PCB Making: 1. Introduction
Nov 9, 2021 PCB Making: 2. Get Started
Mar 15, 2025 PCB Making: 3. Schematics
Nov 9, 2021 PCB Making: 4. Layout
Nov 9, 2021 PCB Making: 5. The Mask
Nov 9, 2021 PCB Making: 6. Cut a Board
Nov 9, 2021 PCB Making: 7. Expose and Develop
Nov 9, 2021 PCB Making: 8. Etching
Nov 9, 2021 PCB Making: 9. Tinning
Nov 9, 2021 PCB Making: 10. Drilling holes
Nov 9, 2021 PCB Making: 11. Solder parts
Nov 9, 2021 PCB Making: 12. Protection and Sealing
Nov 9, 2021 PCB Making: 13. Enclosure
Nov 9, 2021 PCB Making: 14. Testing and Troubleshooting
Nov 9, 2021 PCB Making: 15. Software
Nov 9, 2021 PCB Making: 16. Conclusion

PlayZX

Feb 24, 2026 PlayZX

Flight Sim Remote Panel

Feb 23, 2026 Flight Sim Remote Panel / 2

Porting SpeedCrunch to WebAssembly

Feb 27, 2026 Porting SpeedCrunch to WebAssembly

VMSim

Nov 9, 2021 VMSim – An Attempt at Virtualization

Hacks

Nov 9, 2021 A Poem by FPGA
Feb 23, 2026 Building a Custom Picture Frame
Nov 9, 2021 Fixing convergence on TV
Nov 9, 2021 RS232 and Arduino
Feb 23, 2026 Accuracy of Arduino’s ADC
Nov 9, 2021 RS232 Interface
Feb 23, 2026 Ambient Weather WS-2080 hang fix
Nov 9, 2021 Parallel Port Logic Analyzer
Nov 9, 2021 Software Scope using a Sound Card
Nov 9, 2021 Printing from Eagle
Nov 9, 2021 Etching the PCB: Copper etchant calculator
Feb 23, 2026 Development PC Setup

Z80 / Sinclair

Feb 23, 2026 The Anatomy of a Z80 Gate
Feb 23, 2026 Z80 Instruction Register deciphered
Feb 23, 2026 ZiLOG Z80 (un)documented behavior
Sep 26, 2024 ZX Spectrum ROM mods
Feb 23, 2026 ZX Spectrum on FPGA using A-Z80 CPU
Nov 10, 2021 Sinclair ZX81 lives on!
Feb 23, 2026 Arduino and ZiLOG Z80