gwynap.com/ZX Why this exists Full Screen Glory

ZX Archaeology Engine

The screen is the hero. Click a cell to uncover how those pixels got there.

Visual display

Esc also returns. Click the TV, then play.

Click the TV (pause first) to select an 8×8 cell.

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Hardware inspector

Von Neumann

CPU 64KB ULA address bus data bus

    Dual code trace

    Memory map

    Stack

      Beeper

      Keys —

      Click the TV. K mode: unshifted letters are keywords (P is PRINT). Quotes are " or SYM+P. Backspace deletes. BEEP is not a K-mode key — it lives on Z in E mode (red). Hold CAPS+SYM until the cursor is E, release, then SYM+Z. Overlay CAPS and SYM stay down until the next key — they are released when you load a snapshot. A 48.rom is optional: without it, PRINT uses a stand-in font at $3D00 (not Sinclair’s). In Manic Miner, SPACE (or 0/7) jumps; Z is left, not fire. Arrow keys are Kempston and only count if you hold one during the title tune.

      Live code modder

      Exhibit sections