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The 4P's video monitor is 9" compared to the Model 4's 12". The smaller size, and sharper dots, produce better video output. The computer is compatible with popular internal Model 4 peripherals, [26] and has a slot for an internal modem board. The Radio Shack modem uses its own proprietary command set and only supports communications at 300 baud.
The TRS-80 series of computers were sold via Radio Shack & Tandy dealers in North America and Europe in the early 1980s. Much software was developed for these computers, particularly the relatively successful Color Computer I, II & III models, which were designed for both home office and entertainment (gaming) uses.
Tandy/Radio Shack TRS-80 Model I. In the mid-1970s, Tandy Corporation's Radio Shack division was a successful American chain of more than 3,000 electronics stores. Among the Tandy employees who purchased a MITS Altair kit computer was buyer Don French, who began designing his own computer and showed it to the vice president of manufacturing John V. Roach, Tandy's former electronic data ...
The consumer equipment uses license-free 1 W 900 MHz FHSS encrypted radio modems which respond to standard Hayes "AT" commands. They include a packet-based mode of operation called "star mode", and it is possible to create a point-to-point connection or even a small independent network with data speeds greater than 256 kbit/s.
The internals of the TRS-80 Model 100. The left half is the back. Processor: 8-bit Oki 80C85, CMOS, 2.4576 MHz; Memory: 32 KB ROM; 8, 16, 24, or 32 KB static RAM.Machines with less than 32 KB can be expanded in 8 KB increments of plug-in static RAM modules from Radio Shack or in various capacities from 3rd party vendors.
All were sold through Radio Shack. Later the simpler, more affordable Series I editor/assembler package from Radio Shack itself, familiar to many Model I hobbyists, was offered for the Model II. Radio Shack also had its own macro assembler product, Assembly Language Development System, or popularly known as ALDS. This product was later reworked ...
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