SERV4G parameter: Difference between revisions
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{{Template:SERV4G parameter subtitle}} | {{Template:SERV4G parameter subtitle}} | ||
==Summary== | ==Summary== | ||
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<p> | <p> | ||
The contents of the ATB server are specified by using the <var>[[SERVGA parameter|SERVGA]]</var> parameter. </p> | The contents of the ATB server are specified by using the <var>[[SERVGA parameter|SERVGA]]</var> parameter. </p> | ||
<p> | |||
NOTE: <var>[[DSPOPT parameter|DSPOPT]]</var> must specify 1 or 4 in order to use this parameter.</p> | |||
NOTE: This option is incompatible with <var>[[DEBUGOPT parameter|DEBUGOPT]]</var> setting x'02'. If both are set, an abendSDC2 will occur since boundaries are not page aligned.</p>> | |||
==Example== | ==Example== | ||
Latest revision as of 16:19, 12 December 2023
ATB server starting offset in 4G span
Summary
- Default value
- 0
- Parameter type
- System
- Where set
- User 0 parameter line
- Related products
- All
- Introduced
- Model 204 version 7.8
Description
This parameter allows testing of server tables that span a 4-gigabyte boundary. For example, if SERV4G is X'FFFFF000', each ATB server will begin at XX_FFFFF000. If SERV4G is X'FFFF0000', each ATB server will begin at XX_FFFF0000. XX is determined by the storage available on the system.
The contents of the ATB server are specified by using the SERVGA parameter.
NOTE: DSPOPT must specify 1 or 4 in order to use this parameter.
NOTE: This option is incompatible with DEBUGOPT setting x'02'. If both are set, an abendSDC2 will occur since boundaries are not page aligned.
>
Example
If you want VTBL to span the 4G boundary, you can use these settings: SERV4G=X'FFFFF000', SERVGA=X'00040000', and LVTBL=200 (6400 bytes, X'1900'). This will force each server's VTBL to begin at XX_FFFFF000 and end at XX+1_00000900.