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AR-B7041 User¡¦s Guide
3-3
3.2.2 I/O Port Address Select (SW1-1 & SW1-2)
SW1-1 and SW1-2 are provided to select one of the four base port addresses for the watchdog timer and the solid
state disk. The AR-B7041 occupies 4 I/O port addresses. The following state selections of base port address.
SW1-1 SW1-2 Base Port Solid State Disk Watchdog
OFF (*) OFF 220h 220h-222h 223h & 76h-77h
ON OFF 2A0h 2A0h-2A2h 2A3h & 76h-77h
OFF ON 320h 320h-322h 323h
ON ON 3A0h 3A0h-3A2h 3A3h
Table 3-1 I/O Port Address Select
3.2.3 SSD Firmware Address Select (SW1-3 & SW1-4)
The AR-B7041’ s SSD firmware occupies 16KB of memory. SW1-3 and SW1-4 are used to select the memory
base address. You must select an appropriate address so that the AR-B7041 will not conflict with memory
installed on other add-on cards. Do not to use the shadow RAM area or EMM driver page frame in this area.
SW1-3 SW1-4 Firmware Address Bank Memory Address
OFF (*) OFF CC00:0 (8KB) CE00:0 (8KB)
ON OFF D000:0 (8KB) D200:0 (8KB)
OFF ON D400:0 (8KB) D600:0 (8KB)
ON ON D800:0 (8KB) DA00:0 (8KB)
Table 3-2 SSD Firmware Address Select
If you are going to install the EMM386.EXE driver, please use the [X] option to prevent EMM386.EXE from using
the particular range of segment address as an EMS page which is used by AR-B7041. For example, write a
statement in the CONFIG.SYS file as follow: (If the memory configuration of AR-B7041 is CC00:0)
DEVICE=C:\DOS\EMM386.EXE X=CC00-CFFF
3.2.4 SSD Drive Number (SW1-5, SW1-6 & SW1-7)
The AR-B7041 can simulate one or two disk drives. You can assign the drive number of AR-B7041 by configure
SW1-5, SW1-6 & SW1-7.
If you have copied DOS to the ROM/RAM disk, the computer will always boot from the ROM/RAM disk. After the
DOS is booted, the first disk number will be A: until the program SWAP41.EXE is executed. The SWAP41.EXE
changes the drive number according to the setting of SW1-5, SW1-6 & SW1-7.
If your AR-B7041 does not have DOS and is not assigned as drive A, the computer will boot from your hard disk or
floppy disk. In this case, the BIOS of AR-B7041 will set the drive number of ROM/RAM disk to desired drive
number automatically without having to run SWAP41.EXE after system booting. Do not assign the AR-B7041 with
drive 0 (drive A: ) when the ROM/RAM disk does not have DOS. This is just like that you put a non-DOS disk in
the floppy disk.
If you install only one kind of memory chip on the ROM/RAM disk, the AR-B7041 will simulate one disk drive.
SW1-5 SW1-6 SW1-7 Occupies floppy disk number (SSD)
OFF OFF OFF 0 (Note 1)
ON OFF OFF 1
OFF ON OFF 2
ON ON OFF 3
OFF OFF ON 0
ON OFF ON 0
OFF ON ON 0 or 1 (Note 2)
ON ON ON 0 or 2 (Note 3)
Table 3-3 SSD Drive Number