Gunpei Yokoi's final design, finished after his death, the WonderSwan was a Japan-only handheld that fought the Game Boy on Yokoi's home turf: ruthless efficiency. A 16-bit CPU, play in both portrait and landscape, and a single AA battery that lasted around thirty hours.
The Four Natures
each piece emerges by one of four natures
The Idea
the three-beat story
Designed by Gunpei Yokoi after he left Nintendo (and completed after his 1997 death), the WonderSwan embodied his philosophy — cheap, light, and astonishingly power-efficient, aimed straight at the Game Boy.
A 16-bit NEC V30-family CPU drove capable games while sipping so little power that a single AA battery lasted around thirty hours — a staggering figure that was the whole pitch.
Games could be played holding the unit horizontally or vertically, with two sets of face buttons — well suited to puzzle and vertically-scrolling games. A mono original gave way to a colour model.
The Teardown — Click a Block
the machine, laid out as a block diagram — the main processor on top, the rest of the silicon beneath, buses showing what talks to what. Click any block to read its spec. An accurate architecture diagram (a teardown illustration, not a schematic).
The Spec Sheet
the headline numbers — the spec edition
~3.07 MHz.
non-backlit.
two button sets.
~30 hours.
fought the Game Boy.
The Reckoning
the teardown, and the honesty about it
The Domain: Open It and Spec It
the teardown
- EXEREÚNESIS takes a real, made machine apart down to the chip and writes the honest spec — not a story-world but a technical anatomy.
- >One of a growing series of console teardowns; siblings link from the marquee.
Two-Layer Honest
datasheet vs lore
- Settled: the V30-family CPU, the rotatable design, the single-AA ~30-hour life, and the Japan-only release are documented.
- Flagged: Yokoi died in 1997 before launch; the WonderSwan was completed by his company and Bandai — stated, since it's often credited to him alone.
Render, Not Invent
sourced
- Summarized from the public technical record for the BANDAI WONDERSWAN; the manufacturer and its engineers are cited, not minted.
- No ROMs, BIOS, or copyrighted code are reproduced. Emergents are physical components; the block diagram is an illustration, not a schematic.
The Roster
every chip and part as an ACI .agent — each a birth certificate & a nature (6)
