Hi Larry,
You mean a T4/T8 link?
I guess you could have a go at counting from the poster:
https://web.archive.org/web/20170429001458if_/http://transputer.net/fbooks/poster/PosterT414Big.png
As I remember it, the links are the bottom right block.
Best wishes,
Denis
Hi Tony, David and all,
Does anyone remember how many transistors are in a link? We aregathering information on transistor efficiency; now Tony's numbersindicate floating point costs about 50,000, and David on memoryindicates 4KB costs about 200,000. 25,000 for CPU and 25,000 forlinks would indicate 6000 per link, but that is just a guess and Icould be way off.
As you may be guessing, I am imagining an eight-link Transputer!Long ago, in my PDPTA'96 Roadmap paper, I calculated "burdenbandwidth" for a one-direction link communication using ForrestCrowell and Neal Elzenga's published measurements, and got37MB/s, same whether links were running one-way or both-ways,and per-unidirectional-communication timing bandwidth of 1.2 MB/swhen running both ways. This means by extrapolation that eightlinks running full speed both ways would be supportable (reducingCPU speed by 52% due to DMA burden).
Everything can be mapped into modern cores and communications(e.g. Manchester code lanes); the principle stays the same.
Larry
On Mar 18, 2019, at 9:59 PM, Tony Gore <tony@xxxxxxxxxxxx> wrote:
Hi Larry
As I recall, T414 was about 250,000 and the T800 was 300,000.
Tony Gore
From: occam-com-request@xxxxxxxxxx <occam-com-request@xxxxxxxxxx> on behalf of Larry Dickson <tjoccam@xxxxxxxxxxx>
Sent: Tuesday, March 19, 2019 1:06:42 AM
To: Occam Family
Subject: Transistor countAll,
How many transistors does a Transputer have (e.g. of the T2 or T4 family)? I have heard a wide range numbers from 27,000 to 200,000, but am having trouble finding an authoritative reference.
Larry
