TRS-80.org » Logical Systems http://www.trs-80.org TRS-80.org is a source for information about the Radio Shack TRS-80 line of computers, hardware, and software, with articles, interviews, and more! Thu, 29 Dec 2011 16:36:27 +0000 en hourly 1 http://wordpress.org/?v=3.2.1 The TRS-80 Model 4 http://www.trs-80.org/model-4/ http://www.trs-80.org/model-4/#comments Wed, 09 Feb 2011 14:25:46 +0000 Matthew Reed http://www.trs-80.org/model-4 Model I in 1977. The Model 4 was officially launched for the press on April 27 at an event sponsored by the Boston Computer Society.

The Model 4 was 100% compatible with the Model III and was able to run all Model III operating systems and applications. The designers of the Model 4 had taken great pains to ensure this complete compatibility to avoid the same kind of problems encountered when the TRS-80 Model III was introduced. The Model III had been only partially compatible with Model I software and lack of compatibility was viewed as a costly misstep by Radio Shack. Don White, the Model 4 product line manager, stated, “I took it once on the Model I/III incompatibility and I won't go through that again.”

The Model 4 originally was available in three configurations: ]]> http://www.trs-80.org/model-4/feed/ 3 The Source http://www.trs-80.org/the-source/ http://www.trs-80.org/the-source/#comments Tue, 01 Apr 2008 22:19:04 +0000 Matthew Reed http://www.trs-80.org/the-source The Source was a three volume set containing the complete source code of TRSDOS 6.2 (which was the same as LS-DOS 6.2). Each individual book cost $99, so total cost for a complete set was $297. Later on, these prices were heavily discounted.]]> http://www.trs-80.org/the-source/feed/ 0