Talk:Sun-1

message: Anyone have a pic to add? — Preceding unsigned comment added by 66.191.19.42 (talk) 22:41, 19 December 2006 (UTC)

message: This seems way low.  Maybe fewer than 200 68000-based systems before cutting over to 68010?  I find it hard to believe that Sun sold only 200 systems in all of 1982, since the Sun-2 series didn't come out until 1983.
It's not totally certain to me from accounts I've read, but it sounds like they did cut over to the 68010 in Sun-1 systems before the Sun-2 series was launched.  If so, this might explain the "less than 200" number.--NapoliRoma 18:12, 17 October 2007 (UTC)
replies: text: I'm going to delete the line from the article -- I know we're in WP:NOR territory again, but not really, since the actual problem is that there's no source for the "fewer than 200 systems" statement -- Robert just reinforces that the number is improbably low.--NapoliRoma (talk) 23:47, 24 April 2008 (UTC)
thread_title:  Fewer than 200? 

message: I'm going to remove this statement: "It is not clear if the MMU was used by the Unisoft V7 port of UNIX since it did not support virtual memory." Also the unsourced (and false) claim that Sun-1 had demand paged VM. The Sun-1 had an MMU to support user address space switching, but it couldn't do demand paged VM because the 68000 couldn't restart instructions after a page fault. Rees11 (talk) 20:08, 8 March 2009 (UTC)
thread_title:  VM 

message: There's a lot of confusion about the Sun-1.5 CPU and the 100U and 150U models, and it's hard to find detailed reliable information. But here's what I've found while digging into this.
A 1988 Carnegie-Mellon paper on the Alpha distributed real-time operating system (PostScript file, Google HTML view) has a detailed description of the Sun-1.5 CPU (see section 2.3.2). This makes it clear that it was simply a Sun-1 CPU board with the 68000 replaced with a 68010. The other devices and the MMU were unchanged.
Lots of people seem to think that the 100U and 150U models were Sun-1 systems upgraded to Sun-2 CPUs, but this doesn't seem to have been the case originally. The Sun-2 was not introduced until November 1983. However, an April 1983 Usenet posting by Sun's John Gilmore announces the Model 100U and 150U and says they come with 68010 processors. Since the Sun-2 line and its new CPU design would not be introduced for another half a year, these 68010 processors had to be Sun-1.5 CPUs.
:I'd like to clarify that I don't believe the above is completely correct.  There are 2 Sun 2 "class" CPU multibus boards listed in the Sun FEH.  One will work in a Sun 1 or Sun 2, one will only work in Sun 2.The part numbers are 501-1007 (the one that will work in both) and 501-1051.  The Sun FEH that covers these board clearly indicates that the 501-1007 is for 2/100U 2/120 2/150U  & 2/170.
:Te 501-1051 is only listed for 2/120 and 2/170.   The "original" Sun 1 CPU (270-0001) only lists 1/100.    If there is another CPU board, I do not see it documented in the FEH.
:The 501-1051 and 501-1007 physically are very similar.  The 270-0001 looks much different. Ebaugh (talk) 21:49, 10 October 2014 (UTC)
replies: text: Good work! Looks like the Sun Hardware Reference is a bit inaccurate regarding the early models. Regards, Letdorf (talk) 20:47, 30 June 2011 (UTC)
thread_title:  The Sun-1.5 CPU and the U models. 

message: Early Sun-1 workstations and servers used the original Sun logo, a series of red "U"s laid out in a square, rather than the more familiar purple diamond shape used later.
This is a minor pet peeve, but can I express my discontent at calling the logo "a series of red Us laid in a square"? The logo spells SUN for every 90 degree rotation of the square! It's much more than a series of Us 😁
: Fixed. Jamplevia (talk) 00:01, 8 June 2023 (UTC)
thread_title:  Sun logo