136Chapter D - User's Manual4 GDTX000.EXE is needed for an optimal use of Windows 3.x.4 The GDT controller unfolds its full capacity under MS-DOS or Windows 3.x only whenGDTX000.EXE is installed.4 In order to load GDTSETUP, you need GDTX000.EXE4 In the CONFIG.SYS file GDTX000.EXE must be loaded before GDTXDOS.EXE andGDTASPI.EXE. (Both drivers use functions contained in GDTX000.EXE).4 GDTXDOS.EXE (on the System Disk - DOS) is only needed if more than two hard disksconnected to the GDT controller are to be used under MS-DOS (DEVICE=GDTXDOS.EXE).For example, you have connected three hard disks to the GDT controller and you wish touse them as DOS drives C, D, and E.Following you find an example of a CONFIG.SYS file which is essential for the MS-DOSconfigurationdevice=c:\windows\himem.sysdevice=gdtx000.exefiles=30buffers=30stacks=9,256dos=high,umbinstall=\dos\keyb.com GR,,\dos\keyboard.sysshell=\COMMAND.COM /E:512 /Pdevice=gdtx000.exedevice=mouse.sysdevice=\dos\setver.exedevice=\dos\gdtxdos.exedevice=\gdt\gdtaspi.exedevice=\aspi\aswcdnec.sys /D:CD-ROMlastdrive=hIn this example, besides the GDTX000 driver, the GDTXDOS.EXE driver, the GDT ASPI Ma n-ager and an ASPI Module for a NEC CD-ROM drive are loaded.D.4 Expanded Memory ManagersWhen using Expanded Memory Managers, a certain address area has to be excluded frombeing controlled by these programs. This area is the GDT Dual Ported Memory addressspace (sized 16KB ). If the GDT controller is not run with the GDTX000.EXE driver (that is,the driver has not been loaded from the CONFIG.SYS file), the address space of the GDTBIOS must be excluded, too (the size of the GDT BIOS is 8KB). If the GDTX000.EXE driver isloaded from the CONFIG.SYS file in a line before the Expanded Memory Manager (EMM),it is not necessary to exclude the address space of the GDT BIOS. Unlike ISA or EISA com-puter systems where the controllerís BIOS address space is set manually (through jumpersor the configuration file), PCI computers automatically map the address space of a perip h-eral PCI device (e.g. the GDT controller with its BIOS and Dual Ported Memory) to a sui t-able location during a warm or cold boot. If the system configuration does not change (nonew PCI expansion cards are being added etc.) the PCI System BIOS will always map thesetwo spaces to the same addresses. To help you find out where these addresses have beenmapped to, the GDT BIOS indicates the physical address locations of the GDT BIOS and theGDT DPMEM during the cold boot (also see chapter B in this manual):
