Keyboard Builders' Digest / Keyboard Spotting
TRS-80 Model 4
The TRS-80 Model 4 is the last Z80-based home computer family by Radio Shack, sold from April 1983 through late 1991. Posted by Tomegajones.
Published October 25, 2021
Would you like to contribute to this year's MK Advent Calendar? Here are the guidelines for authors, along with last year's edition for reference.
Tandy Corporation introduced the TRS-80 Model 4 in April 1983 as the successor to the TRS-80 Model III. The Model 4 has a faster Z80A 4 MHz CPU,[5] larger video display of 80 columns by 24 rows, bigger keyboard, and can be upgraded to 128KB of RAM (source).
According to an archive 80 micro magazine issue, a diskless Model 4 with 16KB RAM cost $999; with 64KB RAM and one single-sided 180K disk drive it cost $1699; with 64KB RAM and two drives it cost $1999.
More info: https://en.wikipedia.org/wiki/TRS-80_Model_4
Published on Mon 25th Oct 2021. Featured in KBD #49 (source).
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