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IBM ThinkPad 755 Enhanced 755Ce, 755Cse, 755CD, 755CDV, 755CV, & 755CX Technical Information, Tips, and Techniques Version 3.4 December 1996 Troubleshooting IBM Thinkpad Hardware Setup Problems If you should experience problems setting up PCMCIA Cards or ISA Adapters (in the docking station), please follow the procedures listed below: (1) Please ensure that your ThinkPad is using the latest BIOS release for that system. Later BIOS releases correct problems that users have experienced with the earlier releases. Refer to the ThinkPad BIOS section to determine if you need to update your system's BIOS. Make sure that your software drivers are at the correct release level and are setup properly. Refer to the ThinkPad PCMCIA Drivers section to see if you need to update your system's PCMCIA device drivers. If you are using Point Enablers, please ensure that they are at the latest release level. Determine if any upper memory conflicts exist between the areas claimed by ThinkPad BIOS, Card & Socket Services, Point Enablers, the SCSI Adapter found in IBM Docking Stations, and any ISA Adapters installed in the docking station. Refer to the ThinkPad Memory Map and the ThinkPad Dock I & Dock II Memory Map sections. The Device Driver DICRMU01.SYS /MA=C800-CFFF (DOS PCMCIA Resource Map Utility) sets the upper memory addresses used by Card & Socket Services. The /MA parameter tells Card Services what locations in upper memory can be used by PCMCIA cards or Card Services, and must match or be a subset of an excluded memory range on the EMM386 line of CONFIG.SYS. (2) (3) (4) Microsoft Windows can overwrite the upper memory address used by Card & Socket Services. To prevent this, add an EmmExclude=XXXXXXXX statement to the [386 Enh] section of SYSTEM.INI (Where XXXX-XXXX is the same as the memory region as used in the /MA parameter for the DICRMU01.SYS driver). If you are using point enablers, be sure to exclude any upper memory used by the enabler by adding an EmmExclude statement to SYSTEM.INI. Make sure that no interrupt conflicts exist between ThinkPad devices, PCMCIA Cards, the SCSI Adapter found in the IBM Docking Stations, and any ISA Adapters installed in the docking station. Refer to the ThinkPad Interrupt Assignments section to view the default interrupt assignments. Please note that the ThinkPad System Setup Utility allows you to view and change interrupt assignments for many internal devices. The Resource Map Utility (DOS - DICRMU01.SYS, OS/2 - ICRMU01.SYS) can automatically detect many IRQs already in use, but may not detect all. Try excluding the IRQ of the onboard SCSI and any ISA Adapters in the Docking Station by adding the /IX=xx parameter to the Resource Map Utility (where xx is the IRQ number to exclude). Multiple IRQs may be specified by separating with a comma. (5) (6) Ensure that no DMA conflicts exist between internal ThinkPad devices and any ISA Adapters installed in the docking station. Please refer to the ThinkPad DMA Assignmen