Many TIMEX Sinclair Personal Computer owners have inquired about the differences between the Sinclair computer and the TIMEX Sinclair Personal Computer. Although these differences are small in number, they are also substantial in operating capabilities. Therefore, we’d like to take this opportunity to answer your questions.
SINCLAIR ZX-80 AND ZX-81
Originally designed for the European hobbyist, the Sinclair computer was first marketed in kit form. This inexpensive computer kit permitted the serious hobbyist to build and “customize” his or her own personal computer.
Equipped with a flat-surface, pressure sensitive keyboard, the ZX-80 contains a 4K ROM and a 1K RAM. The ZX-81 provides an 8K ROM and a 1K RAM; the memory capacity of the ZX-81 could be augmented by a 16K RAM pack.
As designed and marketed, the Sinclair computer could not accommodate a modem and offered little application-type software.
TIMEX SINCLAIR 1000 PERSONAL COMPUTER
Although similar to the ZX-81, the TIMEX Sinclair 1000 Personal Computer contains a number of improvements that meet the needs of the American consumer.
First of all, the TIMEX Sinclair 1000 is a fully assembled, ready-to-go computer system. Everything (except the television set and the tape recorder) is provided right in the package. Just complete a simple installation procedure, and the system is ready for operation.
To provide more computing flexibility, the T/S 1000 contains a larger memory; it is equipped with an 8K ROM and a 2K RAM. A 16K Ram Expansion Module substantially extends the storage capacity of the system. (Note that when the RAM Expansion Module is used, the computer’s 2K RAM is shutdown. Therefore, you receive 16K of memory.) The computer is fully compatible with both the TIMEX Modem (coming soon) and the TIMEX Printer.
Today, more than 70 (and growing daily) TIMEX application software products are available. They are marketed on easily-stored, inexpensive tape cassettes for use in the home, the office, for education, and for enjoyment.