And several RS computers and peripherals used 4-pin DIN connectors for
RS-232 serial...
On Mon, Feb 3, 2025 at 1:56 AM Fred Cisin via cctalk <cctalk(a)classiccmp.org>
wrote:
  On Sun, 2 Feb 2025, Steve Lewis via cctalk wrote:
  Didn't the original TRS-80 have a kind of
screw up, where the tape and
 display connector were the same?
 Actually, years later the Atari Lynx had a similar mishap - the power
 charger and headphone jack port look identical?  (something like that,
 
 and
  would cause damage if used incorrectly)
 Steve
 
 On the back (starboard side), there are THREE 5 pin DIN connectors.  Power
 (external cord-wart), video (composite), and cassette.
 yes there were incidents regarding those.
 The original IBM 5150 (PC) had two 5 pin DIN connectors on the back. For
 keybpoard, and cassette IBM didn't sell a cable, but the Radio Shack
 cassette cable for TRS80 worked fine..