Talk:Instruction - Revision history

Larsbrinkhoff: /* Order/order code */ Typo.

2025-11-06T11:19:48Z

‎Order/order code: Typo.

Larsbrinkhoff: Not so much DEC as MIT, apparently.

2025-11-06T10:31:53Z

Not so much DEC as MIT, apparently.

Jnc: /* Order/order code */ Where should I look for PDP-1 usage?

2025-11-05T19:10:12Z

‎Order/order code: Where should I look for PDP-1 usage?

Jnc: /* Order/order code */ That terminology was actually more common in the UK

2025-11-04T13:11:42Z

‎Order/order code: That terminology was actually more common in the UK

New page

==Order/order code==

I actually have the impression that the 'order/order code' terminology was more common in the UK; at Cambridge (see [https://www.cl.cam.ac.uk/relics/orders.notes.html The EDSAC Order Code], and descendants such as the [[LEO]]); and at Manchester (see [https://www.cs.man.ac.uk/CCS/res/res02.htm From Cathode Ray Tube to Ferranti Mark I]). In the US, [[Whirlwind]] mostly used 'instruction' and 'operation code'. [[User:Jnc|Jnc]] ([[User talk:Jnc|talk]]) 13:11, 4 November 2025 (UTC)

@@ Line 8: / Line 8: @@
 : 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-l1 uses both single and double operand address instructions for words or bytes." [[User:Larsbrinkhoff|Larsbrinkhoff]] ([[User talk:Larsbrinkhoff|talk]]) 10:31, 6 November 2025 (UTC)
+: 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." [[User:Larsbrinkhoff|Larsbrinkhoff]] ([[User talk:Larsbrinkhoff|talk]]) 10:31, 6 November 2025 (UTC)

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	I had a look through some [[PDP-1]] documentation, but didn't see 'order' being used. Where should I look? [[User:Jnc\|Jnc]] ([[User talk:Jnc\|talk]]) 19:10, 5 November 2025 (UTC)		I had a look through some [[PDP-1]] documentation, but didn't see 'order' being used. Where should I look? [[User:Jnc\|Jnc]] ([[User talk: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-l1 uses both single and double operand address instructions for words or bytes." [[User:Larsbrinkhoff\|Larsbrinkhoff]] ([[User talk:Larsbrinkhoff\|talk]]) 10:31, 6 November 2025 (UTC)

← Older revision		Revision as of 19:10, 5 November 2025
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	I actually have the impression that the 'order/order code' terminology was more common in the UK; at Cambridge (see [https://www.cl.cam.ac.uk/relics/orders.notes.html The EDSAC Order Code], and descendants such as the [[LEO]]); and at Manchester (see [https://www.cs.man.ac.uk/CCS/res/res02.htm From Cathode Ray Tube to Ferranti Mark I]). In the US, [[Whirlwind]] mostly used 'instruction' and 'operation code'. [[User:Jnc\|Jnc]] ([[User talk:Jnc\|talk]]) 13:11, 4 November 2025 (UTC)		I actually have the impression that the 'order/order code' terminology was more common in the UK; at Cambridge (see [https://www.cl.cam.ac.uk/relics/orders.notes.html The EDSAC Order Code], and descendants such as the [[LEO]]); and at Manchester (see [https://www.cs.man.ac.uk/CCS/res/res02.htm From Cathode Ray Tube to Ferranti Mark I]). In the US, [[Whirlwind]] mostly used 'instruction' and 'operation code'. [[User:Jnc\|Jnc]] ([[User talk: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? [[User:Jnc\|Jnc]] ([[User talk:Jnc\|talk]]) 19:10, 5 November 2025 (UTC)