Timex Computer 3256 Prototype

The Timex Computer 3256 was a proposed third-generation Spectrum-compatible computer developed by Timex Portugal. It expanded memory to 256KB and combined Sinclair BASIC, Timex Extended BASIC, the Timeword word processor and a CP/M terminal in four switchable ROM banks.

A larger 69-key keyboard, RAM disk, sound, communications and support for Timex disk and network hardware targeted more professional applications. At least one prototype was built, but closure of the Portuguese production line prevented release.

Notable Features

• 256KB RAM included a 208KB RAM disk alongside the 48KB Spectrum-compatible area.
• Four 16KB ROM banks held BASIC, Timeword, Extended BASIC and a CP/M terminal.
• 69-key keyboard added cursor keys, function keys and a numeric keypad.

Historical Significance

• The final major computer project of Timex Portugal.
• Shows how the Spectrum architecture might have evolved toward integrated productivity and network use.

Collector’s Notes

• Only prototype hardware is known, and surviving descriptions reflect a late development state.
• It should be identified separately from modern recreations and upgrades inspired by the design.

Specifications

Technical Information
Name	Timex Computer 3256 Prototype
Manufacturer	Timex
Launched	Thursday, January 1, 1987
Country	Portugal
CPU	Zilog Z80A at 3.5 MHz
Units Sold
Operating System	Sinclair BASIC, Timex Extended BASIC, Timeword and CP/M terminal firmware
I/O	RF, composite, RGB, RS-232, network, joystick, cartridge and expansion connections
Keyboard	Integrated 69-key keyboard with cursor keys, function keys and numeric keypad
Storage	Cassette, cartridge and external FDD3000 floppy system
Sound	AY-3-8912 plus internal beeper
Graphics	256 x 192 standard/extended colour and 512 x 192 monochrome
Display	32 x 24 or 64 x 32 text
ROM	64KB in four switchable 16KB banks
RAM	256KB including 208KB RAM disk
CPU Speed	3.5 MHz