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PSF2S370.FLS
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1993-08-23
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.FO OFF
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Document ID G023298
.SP 2
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TITLE: WSC FLASH 9333
PSF/2 1.1.0 S/370 CHANNEL EMULATOR/A PROBLEMS
PSF/2 1.1.0 S/370 CHANNEL EMULATOR/A PROBLEMS
PSF/2 installations on new PS/2's, such as the 9585-OMF, 9585-OXA, 9577-ONA,
and 8590-OLF may experience problems with the S/370 Channel Emulator/A re-
sulting in printer performance problems and/or system hang conditions with
the mouse. The problems occur when the S/370 Channel Emulator/A is installed
in slot 8 for Models 9585-OMF and -OXA, slot 5 for Model 77 and slot 4 for
Model 90s. This problem can cause the system to hang if two (2) S/370 Print
Adapters are installed in any slots on these systems.
The problem has been traced to a conflict between the PS/2 mouse and the
S/370 Print Adapter sharing hardware Interrupt 12.
PSF/2 Development recommends that all new system configurations and any ex-
isting systems that are having system stability problems move the S/370 Chan-
nel Emulator/A from slot 8 to any other slot and that the S/370 hardware
interrupt level be set 10 (decimal).
With two (2) S/370 Print Adapters installed, the interrupt levels for both
adapters must be set to level 10. These interrupt level changes are made
with the PS/2 Reference Disk Configuration.
When making these changes to the S/370 hardware settings, also check that the
S/370 "Control Interface Location" and the S/370 "I/O Buffer Location" con-
figure without conflict (*), and that the I/O buffer is set to the highest
value allowed (32Kb or 64Kb). If the system has a Token Ring card check that
the Token-Ring Adapter Shared RAM Size is set to 16KB. Sometimes this is re-
set during configuration. If another slot is NOT available, the system cards
should be moved such that the S/370 card is NOT in slot 8.
Long term, work is in progress to resolve the interrupt hardware level con-
flict between the S/370 Print Adapter and the PS/2 mouse.