Torch TX20

The Torch TX20 used the same triple-processor workstation and D20 storage combination as the CX20, adding the telecommunications facilities denoted by the T prefix. It could run CPN or Unix while linking users through Torch networks and external communications services.

Designed for offices that treated messaging and remote data access as core tasks, the TX20 reflects Torch’s early belief that a personal workstation should be a communications appliance as well as a stand-alone computer.

Notable Features

• Telecommunications-equipped counterpart to the networked CX20.
• Combined 6502, Z80B and 68000 processors with floppy and 20MB hard disk storage.
• Supported Torch electronic mail, networking and remote communications.

Historical Significance

• An unusually communications-focused British business workstation for the early 1980s.
• Extended Torch’s connected-computing strategy beyond local Torchnet installations.

Collector’s Notes

• Telecommunications modules and approval labels help distinguish TX systems from CX models.
• Preserved configuration disks and modem/network accessories are particularly significant.

Specifications

Technical Information
Name	Torch TX20
Manufacturer	Torch Computers
Launched	Sunday, January 1, 1984
Country	United Kingdom
CPU	MOS 6502A, Zilog Z80B and Motorola 68000
Units Sold
Operating System	CPN and Unix System III with Torch communications software
I/O	Serial, parallel, modem/telecommunications, 1MHz bus and Torchnet
Keyboard	Professional detachable keyboard
Storage	400KB floppy and 20MB hard disk in D20 module
Sound	BBC-compatible sound
Graphics	BBC-compatible graphics with Torch software support
Display	Business monochrome or colour monitor
ROM	Torch MCP, CPN and communications firmware
RAM	544KB total standard; expandable to 1056KB
CPU Speed	6502, Z80B and Motorola 68000