dhesi@bsu-cs.UUCP (Rahul Dhesi) (02/26/89)
>Posting-number: Volume 01, Issue 169 >Originally-from: Keith Petersen <w8sdz@WSMR-SIMTEL20.ARMY.MIL> >Submitted-by: Keith Petersen <w8sdz@WSMR-SIMTEL20.ARMY.MIL> >Archive-name: rs232off/rs232of2.uue I received the following comment about this posting. (Students at Purdue aren't allowed to post news, so this was sent to me in email.) From: iuvax!pur-ee!supple (Murray R Supple) Subject: Re: v01i169: rs232off, switches off comm ports 11-feb-1989 ...The first line of the program turns off interrupts, but they are not turned back on. Granted, they will get turned back on at some point by some DOS or BIOS call, but in a multitasking environment, or if a timing critical program is run next, this could cause problems... Murray Supple UUCP: supple@pur-ee.UUCP ARPA: supple@ecn.purdue.edu -- Rahul Dhesi UUCP: <backbones>!{iuvax,pur-ee}!bsu-cs!dhesi ARPA: bsu-cs!dhesi@iuvax.cs.indiana.edu
w8sdz@smoke.BRL.MIL (Keith B. Petersen ) (02/26/89)
Replying to the comment that interrupts are turned off in rs232off.com
and not turned on again. I questioned this too and was told by a local
MSDOS guru that it is not necessary to turn them back on because the
program terminate INT 20H does it automatically when you exit.
--
Keith Petersen
Maintainer of the CP/M & MSDOS archives at wsmr-simtel20.army.mil [26.0.0.74]
DDN: w8sdz@wsmr-simtel20.army.mil
Uucp: {ames,decwrl,harvard,rutgers,ucbvax,uunet}!wsmr-simtel20.army.mil!w8sdz