Tandy 1000 SL

The Tandy 1000 SL used an 8 MHz 8086 and introduced the PSSJ sound system with digital recording and playback. The later SL/2 revised memory and adopted a 3.5-inch drive while preserving the same architecture.

Its improved keyboard protocol, audio input and integrated interfaces represented the mature XT-class Tandy 1000 desktop.

Notable Features

• Processing is provided by Intel 8086 at 8 MHz.
• The standard memory configuration was 384KB on SL or 512KB on SL/2; expandable to 640KB.
• Display hardware provided Tandy Video II with sixteen-colour and Hercules-compatible modes.

Historical Significance

• Its improved keyboard protocol, audio input and integrated interfaces represented the mature XT-class Tandy 1000 desktop.
• 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 SL
Manufacturer	Tandy
Launched	Friday, January 1, 1988
Discontinued	1990
Country	United States
CPU	Intel 8086 at 8 MHz
Units Sold
Operating System	MS-DOS and DeskMate
I/O	RGB, printer, serial, microphone, headphones, joysticks and expansion slots
Keyboard	Separate enhanced Tandy keyboard
Storage	5.25-inch floppy on SL; 3.5-inch floppy on SL/2; hard disc optional
Sound	Tandy PSSJ sound with three voices, noise and eight-bit digital audio
Graphics	Tandy Video II with sixteen-colour and Hercules-compatible modes
Display	External RGB monitor; 80 x 25 text
ROM	PC-compatible BIOS
RAM	384KB on SL or 512KB on SL/2; expandable to 640KB
CPU Speed	8 or 4.77 MHz