Talk:Instruction
From Computer History Wiki
Revision as of 11:19, 6 November 2025 by Larsbrinkhoff (talk | contribs) (→Order/order code: Typo.)
Order/order code
I actually have the impression that the 'order/order code' terminology was more common in the UK; at Cambridge (see The EDSAC Order Code, and descendants such as the LEO); and at Manchester (see From Cathode Ray Tube to Ferranti Mark I). In the US, Whirlwind mostly used 'instruction' and 'operation code'. Jnc (talk) 13:11, 4 November 2025 (UTC)
I had a look through some PDP-1 documentation, but didn't see 'order' being used. Where should I look? Jnc (talk) 19:10, 5 November 2025 (UTC)
- I'm looking through the results from https://google.com/search?q=%22pdp-1%22+%22order+code%22
- I don't see much usage of "order code" for the PDP-1 by DEC, only this http://www.bitsavers.org/pdf/dec/pdp1/PDP-1CoverLetter.pdf
- However, there are many examples from MIT.
- Interestingly, I do see it in the handbooks for the PDP-11/20 and 11/40! I.e. "The basic order code of the PDP-11 uses both single and double operand address instructions for words or bytes." Larsbrinkhoff (talk) 10:31, 6 November 2025 (UTC)
