Tandy 1000 SX

The Tandy 1000 SX brought the EX’s faster 8088 to a conventional expandable desktop case with standard 8-bit ISA slots. More memory and room for internal drives made it suitable for growing home and small-business systems.

It was the practical mainstream successor to the original 1000 and remained strongly compatible with software using Tandy graphics and sound.

Notable Features

• Processing is provided by Intel 8088-2 at 7.16 MHz.
• The standard memory configuration was 384KB standard; expandable to 640KB.
• Display hardware provided Tandy/PCjr-compatible sixteen-colour graphics.

Historical Significance

• It was the practical mainstream successor to the original 1000 and remained strongly compatible with software using Tandy graphics and sound.
• Storage-only and minor motherboard revisions are documented on this page rather than treated as separate products.

Collector’s Notes

• Confirm the catalogue number, processor, memory and drives because similar Tandy cases were sold in several configurations.
• Original DeskMate or system disks, keyboards, monitors and Radio Shack documentation add historical value.

Specifications

Technical Information
Name	Tandy 1000 SX
Manufacturer	Tandy
Launched	Wednesday, January 1, 1986
Discontinued	1988
Launch Price	$1,199
Country	United States
CPU	Intel 8088-2 at 7.16 MHz
Units Sold
Operating System	MS-DOS and DeskMate
I/O	RGB, composite, printer, serial, joysticks, light pen and five 8-bit ISA slots
Keyboard	Separate Tandy keyboard
Storage	One or two 360KB 5.25-inch floppy drives; hard disc optional
Sound	SN76496-compatible three-voice sound plus noise
Graphics	Tandy/PCjr-compatible sixteen-colour graphics
Display	External composite or RGB monitor; 80 x 25 text
ROM	PC-compatible BIOS
RAM	384KB standard; expandable to 640KB
CPU Speed	7.16 or 4.77 MHz