Don’t let the small size fool you. At just six by 6.5 by 1.5 inches, Sinclair’s ZX81 is a complete desk-top computer. Attached to your TV set, the unit can create graphics-computer pictures- or solve problems with programs you have written using its built-in BASIC language.
In some ways, the ZX81 is a step down from the earlier ZX80 model [PS, May ’80]; it’s smaller and, at $150, it’s less expensive. But it’s a step up in capability. The machine has two software modes. Normally it can compute while displaying flicker-free graphics, permitting computer animation. In its second, “run,” mode it can compute at four times the usual speed.
The unit will also accept additional memory so you can write longer programs or use a larger data base. A 16K plug-in RAM module is available for $110.
For permanent hard-copy storage, the ZX81 can be attached to Sinclair’s new ZX thermal printer ($110). It’s small (see photo), but it prints up to 32 letters, numbers, or graphic characters per line.
Although the earlier ZX80 will probably be phased out, you can update it with a ZX81 retrofit kit for $45. For more information write to Sinclair’s U.S. office, 50 Stanford St., Boston, Mass. 02114. Prices are for Great Britain. They may differ for the U.S.
