Enterprise 64 / 128¶
The ambitious British also-ran (1985): a Z80A backed by two custom chips — Nick (video, up to 672 px, 256 colors) and Dave (sound + memory management) — under EXOS/IS-BASIC. It arrived too late, but the hardware is remarkable. Standard 8-bit repair: recap, keyboard, custom chips.
Enterprise 128 — photo by Wikimedia Commons, CC BY-SA 2.5 (Wikimedia Commons).
Identification¶
| Model | Year | Note |
|---|---|---|
| Enterprise 64 | 1985 | 64 KB (expandable), "futuristic" design |
| Enterprise 128 | 1985 | 128 KB |
CPU: Zilog Z80A @ 4 MHz; Nick (video) + Dave (stereo sound + MMU); RGB/RF output; cassette + 3.5″ floppy (EXDOS via interface).
Repair (technician)¶
- Recap (external PSU + board) → Recap.
- Custom Nick / Dave chips: the video/sound heart, unobtainable new → handle with care, diagnose by substituting the rest (Z80, RAM).
- Keyboard: flex / contacts (the Enterprise's "soft" keyboard ages) → clean.
- RAM: DRAM → test / substitution.
Modernisation & mods — what to buy, how¶
- Storage: Gotek + FlashFloppy with EXDOS 🟡; community SD interfaces (EPNET-type network/SD cards) 🟡 → disk images from a card.
- Video: RGB output 🟢 → SCART then OSSC / RetroTINK or RGB2HDMI.
- Expansion: RAM (up to several hundred KB) 🟡, cartridges 🟢.
- Reliability: recap 🟠; clean the connectors.
⚠️ Do not host ROMs/games — method only.
See also¶
- ZX Spectrum · Amstrad CPC · Recap.
Sources & attribution¶
- Photo Enterprise 128 — Wikimedia Commons, CC BY-SA 2.5, Wikimedia Commons — https://commons.wikimedia.org/wiki/File:Enterprise128_01.jpg
- Wikipedia — Enterprise (computer) (Z80A, Nick, Dave, EXOS) — CC-BY-SA — https://en.wikipedia.org/wiki/Enterprise_(computer)
- Established Enterprise community knowledge (Nick/Dave, EXDOS) — synthesis.
Review & corrections
How this space is used
Spotted a wrong value, an outdated procedure, a chip reference that does not match your board? Say so here, with what you observed (model, board revision, serial number, measurement). Every report is cross-checked against a source before anything changes — an unverifiable correction is published as “reported by …, not cross-checked” rather than silently applied.
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