Grundy NewBrain Model AD

The Grundy NewBrain Model AD added a 16-character vacuum-fluorescent display to the Model A computer. The single-line panel could scroll around the normal screen image, allowing calculations and text work without connecting a television or monitor.

Otherwise it retained the NewBrain’s 32KB memory, advanced BASIC, high-resolution external video and broad expansion options. The self-contained display made the AD the range’s most recognisable and portable configuration.

Notable Features

• Built-in 16-character vacuum-fluorescent display allowed monitor-free operation.
• Cursor controls scrolled the small display window across the larger virtual screen.
• Retained the full external video and expansion capabilities of the Model A.

Historical Significance

• The distinctive fluorescent panel embodied the NewBrain’s original portable-computing ambitions.
• It is the best-known production version of the machine originally developed at Sinclair Radionics and Newbury.

Collector’s Notes

• Brightness and missing segments in the fluorescent display should be checked.
• A complete set may include the optional rechargeable battery module, carrying case and expansion chassis.

Specifications

Technical Information
Name	Grundy NewBrain Model AD
Manufacturer	Grundy Business Systems
Launched	Thursday, July 1, 1982
Launch Price	£229
Country	United Kingdom
CPU	Zilog Z80A at 4 MHz
Units Sold
Operating System	NewBrain BASIC; CP/M with disk expansion
I/O	Two cassette, two RS-232 and expansion connectors
Keyboard	Integrated 62-key keyboard
Storage	Two 1200-baud cassette interfaces; optional floppy module
Sound	Sound available through expansion
Graphics	Monochrome graphics up to approximately 640 x 256 on external display
Display	Built-in 16-character VF display plus television or monitor output
ROM	24KB
RAM	32KB built in; expansion system supported up to 2MB
CPU Speed	4 MHz