12 May
2014
12 May
'14
1:53 a.m.
On 12/05/2014 09:42, Dave wrote:
On 12/05/2014 07:15, Pontus Pihlgren wrote:
I see the PDP-8 is 2.6 microseconds but for 12 bits so hard to compare,
however easily 10x faster for simple operations...
On Mon, May 12, 2014 at 12:16:08AM +0100, Dave
wrote:
Interesting, I guess thats pretty comparable with the Pegasus which
has something like 550 cards with 1500 valves.
https://www.cs.auckland.ac.nz/historydisplays/FourthFloor/Packaging/Packagi…
No idea how many point contact diodes....
On the hand the PDP-8 would I think be much faster. The Pegaus is a
39-bit serial machine with a 330 Khz clock giving an add time of 128
Microseconds Folks,
Can any one tell me whats in a "PDP-8" Straight 8. So how many
logic boards, logic gates, transistors and diodes? Does any one also
have the CPU speed. Its just there is one in www.mosi.org.uk next to
a Ferranti Pegasus. I would like to be able to compare it with the
Pegasus to show how things moved on in the nine years between the
two machines. The poor PDP-8 is much neglected as its much smaller
and less impressive than the Pegasus, yet I am pretty sure it was
faster, cheaper and much more capable.
Dave
G4UGM
The other Dave (Gesswein) counted:
> The backplanes contain 230 cards, approximately 10,148 diodes, 1409
> transistors, 5615 resistors, and 1674 capacitors. 