On 2020-06-05 11:41, Gerhard adam wrote:
The sign is only going to be relevant if that is true. If there is no
sign then there is nothing to discuss.
According to the OP, there is a sign.
The packed form of the number has the sign in the least-significant
byte.
On Thu, Jun 4, 2020 at 6:35 PM -0700, "Seymour J Metz" <[email protected]>
wrote:
You're assuming that the input character string has only digits.
--
Shmuel (Seymour J.) Metz
http://mason.gmu.edu/~smetz3
________________________________________
From: IBM Mainframe Assembler List [[email protected]]
on behalf of Gerhard adam [[email protected]]
Sent: Thursday, June 4, 2020 9:20 PM
To: [email protected]
Subject: Re: Convert *signed* EBCDIC to packed decimal
There is no such thing as a sign before the value is packed or
converted to binary.
Since all numbers have a zone field of X’F’ there can be no discussion
about a sign since it is not part of the number
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On Thu, Jun 4, 2020 at 5:53 PM -0700, wrote:
On 2020-06-05 07:35, Seymour J Metz wrote:
Yeah, 8 microsecond instead of .75 microsecond.
The S/360 normal cycle time was 2 microseconds.
--
Shmuel (Seymour J.) Metz
________________________________________
From: [email protected] [[email protected]]
Sent: Thursday, June 4, 2020 5:28 PM
To: IBM Mainframe Assembler List
Cc: Seymour J Metz
Subject: Re: Convert *signed* EBCDIC to packed decimal
On 2020-06-05 03:45, Seymour J Metz wrote:
I remember $.25/bit, but don't recall what year that was; too low for
1960, too high for 1969.
Don't forget that there were two types of core memory for
the S360 --
LCS used a product from India, with a much slower cycle time
compared to IBM's normal memory.
