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Across the Boards

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Communications Device Drivers

Section 3 - General Information

Page 14

cfSOFTWARE Confidential,

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2000

CICS Terminal Definition

A critical factor in the use of 3270 terminals is the size of the terminal I/O area. This is defined in the TIOAL

parameter in the TCT entry or in the IOAREALEN parameter of the TYPTERM entry if RDO is used to define

terminals.

If the device is non-SNA the value specified should be at least as large as the maximum message that will be

sent to the device. For Model 5 devices, 4000 must be specified.

For SNA devices two parameters are specified, the chain size and the maximum size. The value 256,4000 would

be appropriate for all devices.

We have encountered ATNI abends in cases where too small a TIOAL is specified.

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Eicon Networks CX1 Specifiche Pagina 24