On 2020-06-05 10:04, Seymour J Metz wrote:
Clock cycle isn't everything.
Clock cycle WAS everything then.
Clock cycle of Pilot ACE was around 4 times faster than
other machines of the 1950s, and hence a similar factor
faster.
"An addition could take anywhere from 64
microseconds to 1024 microseconds. "
Pilot ACE and DEUCE addition took 32 microseconds.
Double-length addition was 64 microseconds.
Adding a single length number to a double-length
number took 32 microseconds (the single-precision
number was automatically sign extended to 64 bits).
For array operations, addition could take up
to 1056 microseconds for up to 33 numbers.
I could find information on the Pilot ACE and
MOSAIC, but not on the full ACE.
________________________________________
From: robi...@dodo.com.au [robi...@dodo.com.au]
Sent: Thursday, June 4, 2020 7:38 PM
To: IBM Mainframe Assembler List
Cc: Seymour J Metz
Subject: Re: Convert *signed* EBCDIC to packed decimal
On 2020-06-05 08:24, Seymour J Metz wrote:
Thanks.
My understanding is that delay lines using a solid medium were more
reliable than Williams Tubes,
That's right.
so using them on slow machines seems
reasonable..
Pilot ACE was the fastest machine in the world in 1951.
DEUCE ran at the same speed. Clock rate 1Mhz.
If not the fastest in the world in 1955, one of the fastest.
ACE 1956(?) was even faster, about one-third faster clock rate.
