title, categories, types, origins, years, cpus, params
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Lucas Nascom 3
Computers
Home Computer
United Kingdom
1981
Zilog Z80 A
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Nascom 3
/companies/lucas
Lucas
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NAME
Nascom 3
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MANUFACTURER
Lucas
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TYPE
Home Computer
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ORIGIN
United Kingdom
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YEAR
December 1981
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BUILT IN LANGUAGE
Microsoft Basic
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KEYBOARD
Full-stroke keyboard
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CPU
Zilog Z80 A
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SPEED
4 MHz
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RAM
8 KB to 60 KB (depending on models)
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ROM
Unknown
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TEXT MODES
40 or 80 columns x 25 lines
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GRAPHIC MODES
400 x 256 (8 colours) - 800 x 256 (2 colours)
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COLORS
8 (320 x 256) / 2 (640 x 256)
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SOUND
Unknown
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I/O PORTS
TV and video outputs, tape recorder, Serial and Parallel ports
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BUILT IN MEDIA
Two 350 KB 5.25'' disk-drives (optional)
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OS
NAS-SYS, CP/M 2.2 or NAS-DOS
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POWER SUPPLY
built-in power supply unit
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PERIPHERALS
Light pen, NASBUS cards
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PRICE
$1,493 (UK, 1982)
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LARGE VIEW
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LUCAS LOGIC BROCHURE
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IEEE488 CARD
Made by EV Computing Ltd.
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ROM CARD
This card can be fitted with 2708 (1 KB) or 2716 (2 KB) EPROM chips, giving up to 32 KB of ROM area.
The card also provides a special socket (bottom left) for the 8K Microsoft BASIC interpreter ROM.
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ROM/RAM MEMORY CARD
Features 32 KB RAM (16 x 4116) and 8 KB ROM (4 x 2708)
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48 KB RAM CARD
This card holds 3 banks of 16 KB 4116 RAM chips.
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COLOR GRAPHICS CARD
The PLUTO color graphics card offered a maximum resolution of 768 x 576 pixels with 8 colours. It featured an Intel 8088 processor, 192 KB of RAM (3 planes of 64 KB) and could be connected to any RGB TTL or composite colour or monochrome monitor.
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I/O CARD
This card provides support for six 8-bit parallel ports, one serial port (not installed here), and one counter/timer control unit.
The card was supplied with empty sockets. Each device could be acquired separately.
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FDD CONTROLLER CARD
Floppy disk drive controller card along with its genuine Lucas box.
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BUS CARD EXTENDER
This card allowed to check any Nascom card without it being directly inserted into the Nascom bus.
When the original Nascom company went into liquidation, the owner and a number of staff immediately set up Gemini in the next town. Gemini produced computer boards and systems using the same bus as the original Nascom. After some delay, the original Nascom operation was taken over by a division of Lucas Industries in 1981 (renamed Lucas Nascom), who developed the system and produced new boards and software.
The Nascom 3 was basically a cased version of the original Nascom 2, using the original Nascom 2 mother board, with space for fitting various expansion cards (disc drive interface, Advanced Video Controller, memory, etc).
Both CPM and NAS-DOS operating systems were available for disc users, though the original tape interface remained, and in its most basic form the machine could be used with this, and no disc drives. There was also a network system based on NAS-DOS.
Since the bus of both the Nascom and Gemini systems was the same, it was not unusual for users to create hybrid systems - adding, for example, Gemini boards to their Nascom 3 or 2, or of course fitting Nascom boards into Gemini systems. Lucas designed and manufactured their own boards and systems, and indeed the Gemini and Nascom products were in competition in the market.
There was several software available: Nascal (Financial Modeller), Manor (Data Base Manager), Corplan (Business Modeller), Calcstar (Financial Modeller), Wordstar (Word Processor), FMS 81 (Data Base Manager), etc.
The Nascom III can accept Nascom II boards, and some new hardware: Hires colour graphics, 80 columns, single or double floppy drives (0.75 MB each), printer, etc.