Delete comment from: Ken Shirriff's blog
Attn: George Byrkit,
The Univac 1108 family (1106, 1108, 1110, 1100/10, 1100/20, 1100/60, 1100/80 and beyond) used Fieldata (six-bit code, 3-binary digit octal characters, six characters to a 36-bit word) of only uppercase, numerics, some special characters, and barely any data control characters (CR/LF) as its native encoding. 7-bit ASCII characters were mapped over the 36-bit word as four 9-bit characters to the word with "stop-bits" (individual character "sign" bit, if you like) to indicate end of character encoding so that byte channel controllers (as opposed to word channel controllers (disk and drum)) knew when to terminate byte sequenced transfers.
Also, the Univac 1100 series was a ones-complement computer utilizing Octal representation throughout (manuals and even dumps) with all machine instructions occupying single words, although there were some doubleword operations against storage, I.E.: double-word shifts and double word floating point.
Apr 12, 2022, 7:55:53 PM
Posted to Reverse-engineering a mysterious Univac computer board