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Jupiter Ace

Jupiter Ace · 1982–1984 · desktop

Specifications

Cpu: Zilog Z80, 3.25 MHz
Ram: max: Approximately 49 KB user RAM with the largest period RAM packs on the expansion bus (16 KB packs were the common upgrade) · base: 1 KB user RAM (plus 2 KB dedicated video/character RAM)
Ports: Rear edge-connector expansion bus · Cassette in/out (ear/mic jacks) · RF TV output
Display: Monochrome, 32x24 text with 8x8 user-redefinable characters for graphics, RF out to a TV; a planned colour board never shipped
Storage: base: Cassette recorder via ear/mic jacks, 1500 baud (no internal storage) · options:
Os Support: latest: Same ROM Forth across the run · shipped: Forth in 8 KB ROM (not BASIC), from ex-Sinclair engineers Richard Altwasser and Steven Vickers
Release Price: £89.95

Variants

Revisions

Jupiter Ace 40001983 relaunch in a sturdier injection-moulded case, same board

Upgrade paths

RAM

16 KB or larger RAM packs on the rear expansion bus · Same wobbly-RAM-pack arrangement as the ZX81; period 16 KB packs and later third-party packs up to about 48 KB are documented, with slightly varying usable-memory figures across sources.

EASY