- Timex Sinclair 1000
Released = July, 1982
Discontinued = 1983
Processor = Zilog Z80A @ 3.25 MHz
Memory = 2 KB
OS = Sinclair BASIC__NOTOC__ The Timex Sinclair 1000 (TS1000) was the first computer produced by
Timex Sinclair, a joint-venture between Timex Corporationand Sinclair Research. It was launched in July 1982.
The TS1000 was a slightly modified
Sinclair ZX81with an NTSC RF modulatorinstead of a UK PAL(Units sold in Portugal have a PAL RF modulator) device and the onboard RAM doubled to two KBs. The TS1000's casing had slightly more internal shielding but remained the same as Sinclair's, including the membrane keyboard. It had black & white graphics, and no sound. It was followed by an improved version, the Timex Sinclair 1500.
Like the Sinclair ZX81, the TS1000 used a form of BASIC as its primary interface and programming language. To make the membrane keyboard less cumbersome for program entry, the TS1000 used a shortcut system of one-letter "keywords" for most commands (i.e. pressing Shift-"P" would generate the keyword "PRINT"). Some keywords required a short sequence of keystrokes (e.g. SHIFT-ENTER S would generate the keyword "LPRINT"). The TS1000 clued the user in on what to expect by changing the cursor to reflect the current input mode.
The TS1000 sold for $99.95 in the US when it debuted, making it the cheapest
home computerto date at the time of its launch (its advertising angle was "the first computer under $100".) The black and white display showed 32 columns and 24 lines (22 of which were normally accessible for display and 2 reserved for data entry and error messages). The limited graphics were based on geometric shapes contained within the operating system's non-ASCII character set. The only form of long-term storage was to plug into an often unreliable home tape cassetterecorder. The 16K memory expansion sold for $200. A shortage of the memory expansions coupled with a lack of software which ran within 2K meant that the system had little use for anything other than an introduction to programming. Home computer magazines of the era such as Compute!showed enthusiasts how to interface the computer with various kinds of equipment, providing the opportunity of learning about early speech synthesis technology through a Speak & Spell, robotics control through the memory port, and scrolling text displays for advertising.
Over time, the TS1000 spawned an enormous cottage industry of third-party add-ons designed to help remedy its limitations. Full-size keyboards, speech synthesizers, sound generators, disk drives, and memory expansions (up to 64K) were a few of the options available. Languages like Forth and Pascal as well as BASIC compilers, and assemblers augmented the TS1000's programming possibilities.
Microcomputingmagazine published an article in April 1983 decrying the membrane keyboard ("The designers of the Timex-Sinclair 1000 ... reduced this important programming tool to a fraction of the required size") and describing how to wire up external full-size keyboards.
Timex Sinclair 1500
The TS1500 was a slightly-upgraded development of the TS1000. It replaced the earlier machine's ZX81-like case with a
ZX Spectrum-like case (in Silver), the same ZX Spectrum rubber keyboard, a custom ULA (it does not have the Ferranti ULA) and increased the onboard RAM to 16 KB. In spite of this, it was not a commercial success because it was launched too late when the ZX 81/TS1000's successors, the ZX Spectrum/TS2068, were already available.
The TS1500 was manufactured by Timex of Portugal and sold in the
There are two little-known software differences between the TS1000 and TS1500.
On the TS1000 and ZX81, the command:
results in the Timex printer outputting 0.0XYZ1. This well-known fault is corrected on the TS1500.
The TS1000 runs the following loop correctly, but the TS1500 does not; making one fewer iteration than it should.
10 FOR I = 0 TO 1 STEP .25 20 PRINT I 30 NEXT I
As explained in the "users guide" for the TS 1000 when connected to a B/W TV a clock could be produced without a cartridge.Timex Computer Corporation produced a cartridge interface for the TS1500, the Timex Sinclair 1510 Command Cartridge Player. Only four cartridge titles were ever released:
*07-9002 States and Capitals
*07-9004 Flight Simulator
The TS1510 can be used with a TS1000 and a 16K RAMPack.
* [http://www.cedmagic.com/history/timex-sinclair-1000.html 1982: Timex Sinclair Computer]
* [http://oldcomputers.net/ts1000.html Timex Sinclair 1000]
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