Across the Boards
Communications Device Drivers
Section 3 - General Information
Page 12
cfSOFTWARE Confidential,
2000
3270 Controllers (continued)
The FILE TRANSFER AID bit (.... .1..) must be ON. That means that hex 04 must be ORed to any
other value desired for Feature 125.
NOTE:
The new IBM 3174 Model 90R microcode B Version 2.0 has a bug that causes it NOT to
honor the TRANSFER AID bit. You must apply patch PTR 9032 from IBM to fix this problem.
The problem manifests itself as no data being transfered from the 3270 buffer to the mainframe --
only the AID key is sent to the host.
Even on 3174-90R microcode releases that
do
support the file-transfer-aid bit, it is
not
documented
in any of the 90R documentation. The general 3174 manuals describe the option, but the 90R
specific documentation describes the entire option 125 field as “Reserved, leave at default values”
(0000 0000).
IBM 4700
The IBM 4700 controller used by banking systems appears to work the same as a 3274 for ATB purposes in
many configurations. In some configurations, the 3174 equivalent of the “File-Transfer AID Bit” is not
implemented. These 4700’s will run with DIALOG, but APPX or any application that attempts to copy directly
to the presentation space will fail.
It appears that at least one “standard” configuration on the 4700, while otherwise emulating a CUT 3174,
requires
different
scan codes. A MAINSCAN.SC4 has been created and can be loaded by CFXIBMX,
CFXIRMA, and CFXFORT drivers after 05/03/91. Specify “4” as the alternate keyboard scan code buffer
suffix in MAINCON. The major symptom is CLEAR and other function keys not working in DIALOG.
Integrated Controller
The IBM 4361 mainframe’s integrated controller may translate the character “{“ (ASCII 7B hex and EBCIDC
C0 hex) to hex 00. This can be fixed by zapping MAINCFG.VDT, changing the byte at +11 hex into the file
from 7B to something like 5B (“[“).
AT&T 6544
It seems that the AT&T 6544 is mistranslating or not sending certain data.
Memorex Telex Controllers
Memorex/Telex controllers have the equivalent of the 3174 File-Transfer-Aid bit. There is a global (default)
setting, as well as a per-terminal configuration screen.
Non-English Controllers
Some controllers configured for languages other than English require that CUT mode devices send different
keyboard scan codes. CFXIBMX, CFXIRMA, and CFXFORT drivers after 05/03/91 can use an alternate
keyboard scan code table (a MAINSCAN.SC? file). Specify the suffix of the alternate keyboard scan code table
in MAINCON. The major symptom is function keys not working or keys causing inappropriate actions or
characters.
The following MAINSCAN.SC? files are available:
File Name
Suffix (used in Maincon) Usage
MAINSCAN.SC4 4 4700 (see above)
MAINSCAN.SCS S Spanish controllers
(24 pages)
(26 pages)
(16 pages)
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