[Info-vax] disabling a CTRL/Y ast

[VAXman- at SendSpamHere.ORG]

In article <a8aa8d7c-102c-4e00-a8ba-5af1b816caf2 at googlegroups.com>, Tom Adams <tadamsmar at gmail.com> writes:
>On Wednesday, January 6, 2016 at 10:47:51 AM UTC-5, Bob Gezelter wrote:
>> On Wednesday, January 6, 2016 at 10:15:11 AM UTC-5, Tom Adams wrote:
>> > Section 5.4.3.2 here:
>> >=20
>> > http://www2.hmc.edu/www_common/OVMS072-OLD/72final/6136/6136pro_019.htm=
>l
>> >=20
>> > explains how to enable a ctrl/y ast using IO$M_CTRLYAST. It also says:
>> >=20
>> > "This function code is also used to disable the AST."
>> >=20
>> > but I cannot figure out the arguments of the QIOW call that would disab=
>le the AST.
>> >=20
>> > How does one disable the AST?
>>=20
>> Tom,
>>=20
>> From the referenced page:
>>=20
>> "5.4.3.2 Enable Ctrl/C AST and Enable Ctrl/Y AST Function Modifiers
>>=20
>> Both set mode functions can take the enable Ctrl/C AST and enable Ctrl/Y =
>AST function modifiers. These function modifiers request the terminal drive=
>r to queue an AST for the requesting process when you press Ctrl/C or Ctrl/=
>Y. The following combinations of function code and modifier are provided:
>>=20
>>     IO$_SETMODE!IO$M_CTRLCAST---Enable Ctrl/C AST
>>     IO$_SETMODE!IO$M_CTRLYAST---Enable Ctrl/Y AST=20
>>=20
>> These function code modifier pairs take the following device- or function=
>-dependent arguments:
>>=20
>>     P1---Address of the AST service or 0 if the corresponding AST is disa=
>bled
>>     P2---AST parameter
>>     P3---Access mode to deliver AST (maximized with caller's access mode)=
>"
>>=20
>> Note the description of P1, to wit: "... 0 if the corresponding AST is di=
>sabled". Admittedly, the English could be better ("is disabled" would proba=
>bly be better described as "is to be disabled.").
>>=20
>> - Bob Gezelter, http://www.rlgsc.com
>I tried this:
>
>           sts =3D sys$qiow (     ,
>        1                       %val(chn),
>        1                       %val(IO$_SETMODE.or.IO$M_CTRLYAST),
>        1                       iosb,,,%VAL(0),,,,,)
>
>but it does not disable the AST.  What am I missing?

What AST is being delivered when you issue CTRL/Y?

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