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Coordinate 68000 access to Mega Drive Z80 memory with BUSREQ polling, reset separation, byte-lane care, safe release, and reproducible audio-subsystem diagnostics.
Trace the Neo Geo Z80 sound command path into the YM2610, distinguishing FM and ADPCM engines, sample ROM mapping, and banked driver state.
Trace the Spectrum 48K ULA's shared display RAM fetches, CPU contention delays, floating-bus reads, frame phase, and model-specific timing evidence.
How Tandy Radio Shack paired a Z80, BASIC, cassette storage, a monitor bundle, and thousands of stores to make the TRS-80 a mass-market microcomputer.