Z80 Articles

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5/31/2026 • EN

Technical article detailing rendering Viewdata 40x24 frames on a ZX Spectrum, covering control codes, cursor handling, and display buffer logic.

assembly Control Codes rendering Viewdata Z80

5/6/2026 • EN

Deep dive into the VTX5000 terminal's Z80 machine code for 8251 USART communication, buffer management, and keyboard scanning.

8251 assembly Retrocomputing Usart Z80

4/16/2026 • EN

Deep dive into the VTX5000's 8KB ROM, covering memory paging, Z80 machine code, and trampoline routines for Spectrum integration.

Memory Paging Rom Spectrum Viewdata Z80

2/2/2014 • EN

A developer recounts debugging a bizarre bug in a custom calculator kernel that only manifested when no breakpoints were set.

assembly debugging Kernel Low Level Z80

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