Tag: io

• TEC-1G Hardware Fidelity

  2026-01-31 | Series: debug80diaries | Tags: debug80, tec1g, z80, io, hardware, emulation

  The TEC-1G's I/O ports use full 8-bit address decoding while the original Debug80 simulation only checked the low three bits. I fixed the port decoding then added the expansion banking registers bringing the simulation closer to the real hardware behaviour.

• Bringing Legibility to Execution: Terminal I/O and Register States

  2026-01-22 | Series: debug80diaries | Tags: debug80, z80, terminal, io, registers

  Debugging is the process of making the invisible visible. This article examines how Debug80 implements terminal interaction and rich register visibility to provide a legible state of the Z80 machine.