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Tandy Radio Shack
1000 SX

The Tandy 1000 SX was similar to the Tandy 1000 (see this entry for more info about the Tandy 1000 series).

The difference with the original model 1000, is that the CPU (Intel 8088) can be set to two different speeds: 4.77 MHz and 7.16 MHz thus offering more speed than the original IBM PC on the same software. The SX also comes with more memory (384 KB) than the Tandy 1000 (128 KB).


Contributors: Derek McDonald (aka “Skel”)

We need more info about this computer ! If you designed, used, or have more info about this system, please send us pictures or anything you might find useful.



I stand corrected, the 8088 was the correct model of cpu, a variant of 8086 with "turbo" mode... (I got it in my head the other way around, but a few searches made me remember 8086,286,386...), I loved that computer btw, King''s Quest II was a delight for that time and my age...(never played the I :( )

Monday 24th August 2015
Roberto (Panama)

I''m pretty sure the processor was an 8086, slight different than the 8088... can you confirm?

Monday 24th August 2015
Robert (Panama)
VortecsMaster Blog

I have this model.. Still works too.As does the printer that came with it.
My dad used it to do alot of his writing before I updated him to a Linux pc

Back in the day I added Ram to it so the 1000sx could get max of 640k It needed that in order to run software like
Spinnakers eight-in-one
still love to find a HD for it.

Monday 11th August 2014
scott (Ohio/USA)


NAME  1000 SX
MANUFACTURER  Tandy Radio Shack
TYPE  Home Computer
YEAR  1986
KEYBOARD  Full stroke keyboard, 90 keys, 12 function keys, numeric keypad
CPU  Intel 8088
SPEED  4.77 MHz / 7.16 MHz
CO-PROCESSOR  Intel 8087 math. coprocessor available as an option
RAM  384 KB (up to 640 KB)
TEXT MODES  80 x 25 / 40 x 25
GRAPHIC MODES  CGA/TGA, 160 x 200, 320 x 200, 640 x 200
COLORS  16 foreground colours + 8 background colours
SOUND  3 voices + 1 sound channel
SIZE / WEIGHT  354 x 290 x 97 mm / 31 lbs
I/O PORTS  keyboard, 2 x joysticks, RGBI color monitor video output, composite video output, lightpen port, parallel port, serial port, 5 internal expansion slots, audio output (mono)
BUILT IN MEDIA  one or two 5.25'' floppy disk drives (360 KB)
OS  MS-DOS 3.22, DeskMate II and GW Microsoft Basic included with the system
POWER SUPPLY  Built-in power supply
PERIPHERALS  memory expansions, internal modems, 20 MB hard disk, etc.
PRICE  $849 (USA, 1988)

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