SYSTEM EXPANSION

Note

Memory addresses are always written in base 16 or hexadecimal notation. Unlike the ten digits of the decimal system (0-9), hexadecimal uses sixteen digits (0-9 and A-F, where A=10, B=11, C=12 and so on up to F=15). Hexadecimal numbers are denoted either by the suffix “h” or by the prefix “0x”. The final digit of a five-digit memory address is often omitted, so C8000h may be written as C800h. Since amounts of memory are usually stated as kilobytes rather than in hexadecimal notation, the following conversion table may be helpful:

4 Kbytes =

1000h

32 Kbytes =

8000h

8 Kbytes =

2000h

64 Kbytes =

10000h

16 Kbytes =

4000h

128 Kbytes =

20000h

 

 

 

 

The card’s documentation should list its possible base memory addresses. You will also need to know how much memory the card has, so that you can leave the right gap between this card’s base address and the next.

Installing the card

The only tool required is a small cross-head screwdriver

1.Turn off the computer and unplug all power cords.

2.Take suitable anti-static precautions and remove the system unit cover.

Note

If you are unfamiliar with the recommended anti-static precautions and/or the process of removing the system unit cover, refer to Appendix A, “Inside the System Unit”.

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