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CompuGen 3250
If you run GageConfig and see the verification result to be "ABSENT", you may have either an I/O conflict or a
memory conflict.
To solve the problem, try the following:
1. Check that I/O Address listed on the screen matches that of the card’s I/O DIP Switch setting
2. If you have multiple CompuGen or CompuScope cards in the same system, compare the I/O address of your
card to the I/O addresses of other cards in your system. Ensure that no two cards have the same I/O address.
(Remember that the CompuGen 3250 requires four consecutive I/O addresses. For example, if the base
address is 0300H, then 0300, 0301, 0302, and 0303 will be occupied by the CompuGen 3250 card.)
3. Check to see if each individual switch in the I/O DIP Switch is fully flipped to one side or another. There
has been one case in which vibration during shipment caused one of the switches to be “in between” ON and
OFF states.
To solve this problem, simply flip the switch to one state and then back to the desired state, e.g. if the switch
had to be ON, just flip it to the OFF state and then back to ON.
4. Enter different memory segment addresses into the “Memory Address” box and click on the
Verify
button to
try again. Some common addresses are listed below:
D000 D100 D200 D300 D400 D500 D600 D700
D800 D900 DA00 DB00 DC00 DD00 DE00
DF00
B000 B100 B200 B300 B400 B500 B600 B700
B800 B900 BA00 BB00 BC00 BD00 BE00
BF00
C000 C100 C200 C300 C400 C500 C600 C700
C800 C900 CA00 CB00 CC00 CD00 CE00
CF00
E000 E100 E200 E300 E400 E500 E600 E700
E800 E900 EA00 EB00 EC00 ED00 EE00
EF00
5. If the reported error is a memory failure, check CONFIG.SYS to see if EMM386 is installed and if the
following line exists in CONFIG.SYS:
DEVICE = C:\WINDOWS\EMM386.EXE NOEMS
If this line does exist, change it to the following using any text editor:
DEVICE = C:\WINDOWS\EMM386.EXE NOEMS X=D200-D3FF
6. Some motherboards may use up the Upper Memory Blocks (UMBs) for their own use. You will have to find
an appropriate entry in the CMOS BIOS (in a sub menu called Advanced Chipset Control or something
similar) and change the relevant memory space from “Available” to “Reserved”.
When this setting says “Available”, it really means to say “Available for the motherboard to use”. When
you set it to “Reserved”, you are telling the BIOS to “Reserve it for me”.
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