ROM: none (running demo harness)
Upload a ROM (or drag one onto the screen) — it loads at $00000 and the 68000 boots from its reset vector. Click the screen & type to feed the 8049 IPC.
68000 CPU Motorola. Fetch → decode → execute.
PC=000000
SR=2000
ZX8301 Video The Master Chip. Reads display file, paints rasters.
Mode4 (512×256×4)
FB base$020000
Beamline 0 / col 0
VBlank0
display-file change heatmap