Talk:Signetics 2650

Odd units

Given that this CPU was developed by a US company and produced there, from what I can see, why are all the prices and references within in AUD? Maury Markowitz (talk) 14:49, 15 August 2011 (UTC)

Because no-one since 2008 has read the article been troubled enough to look up US prices for the part? --Wtshymanski (talk) 15:13, 15 August 2011 (UTC)

== Introduction date == — Preceding unsigned comment added by 2003:69:AD7E:2A00:C816:70DC:63C:18C2 (talk) 14:12, 17 July 2016 (UTC)

I can't find any source that says this was introduced in 1973; in fact most sources seem to imply introduction around 1975. Mangoe (talk) 13:26, 8 February 2013 (UTC)

The earliest credible reference I have been able to find so far is in an article in Computerworld dated 4 Sep 1974 where it mentions the 2650 in a list of "new and available systems" to be discussed in a survey session titled "Microprocessor - The 2nd-generation" at Wescon 74.Chris Burrows (talk) 02:18, 17 February 2013 (UTC)

2Q/1975 by The Encyclopedia of Computer Science and Technology: Volume 10. Even the introductory ad on that page is from October of 1975. Why would an introductory be published 2 years after it's introduction? --CyberXRef^talk 03:18, 13 January 2014 (UTC)

Second source?

See this: "Synertek made a chip labeled 2650-P-02 that is often mistaken for a 2650 processor. It is NOT a 2650 processor and use of it in the Test Board may produce unexpected results or damage." www.cpushack.com/wp-content/uploads/2016/07/2650_Testboard_Manual.pdf — Preceding unsigned comment added by 2003:DD:3F45:6EE3:8DA6:F1B4:AE32:A1DC (talk) 22:10, 8 September 2019 (UTC)

Clock speed

The paragraph on Uses mentions an incorrect CPU clock speed:

Emerson Arcadia 2001 which was released in 1982 and which used a Signetics 2650 running at 3.58 MHz as a CPU belong to this group together with many other ones software-compatible (Leonardo, Hanimex MPT-03 etc.).

This cannot be correct, as the standard 2650(A) ran up to 1.25 MHz. Even the 2650A-1 variant only ran up to 2MHz. The Arcadia schematics (e.g. at wiki.console5.com) show that the system contains a 3.58 MHz clock (approximately), but that the clock signal is divided by four, giving a CPU clock speed of 0.895 MHz. This inaccurate information shows on many console-related websites. I will correct this in the article. EelcoVriez (talk) 06:20, 27 December 2023 (UTC)