The ASCII bit in the PSW affected only the decimal instructions, including 
UNPK. It did not affect how the card reader read zoned numeric data.


--
Shmuel (Seymour J.) Metz
http://mason.gmu.edu/~smetz3

________________________________________
From: IBM Mainframe Discussion List <IBM-MAIN@listserv.ua.edu> on behalf of 
Paul Gilmartin <0000000433f07816-dmarc-requ...@listserv.ua.edu>
Sent: Monday, November 19, 2018 8:31 PM
To: IBM-MAIN@listserv.ua.edu
Subject: Re: So much for THAT excuse | Computerworld SHARK TANK

On Mon, 19 Nov 2018 15:54:58 -0800, Tom Brennan wrote:

>On 11/19/2018 2:39 PM, Pew, Curtis G wrote:
>
>> Right. The expectation was that routines would check the bit and generate 
>> output in the appropriate codeset, and eventually everyone would be using 
>> ASCII. Instead, everyone ignored the bit and generated EBCDIC, so the bit 
>> was reused for something else (I can’t remember what either.)
>>
>Thanks!  I was going to ask how a bit in the PSW could possibly affect
>any kind of code translation.
>
Did it not also affect the format of zoned decimal data?

-- gil

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