Section 4-1.2 Setting a Non-Standard Base Address
If another device has pre-empted address 1000, then you will have to choose a different number for the NEAT
controller card. The permissible choices are (in decimal numbers) 512, 516, 520, ... 1020, etc. in steps of four.
In hex numbers this translates to 200, 204, 208, 20C, ... 3FC.
If you choose the address as a decimal number, you must convert it to hex first to set the DIP switches.
For example, suppose we want our address to be 700 (dec). We need to convert this to the hex number
H2H1H0.
1. Begin with the number to be converted and divide it by 256. The result is a quotient and a
remainder. The quotient in this case is 2 and becomes H2.
2. Take the remainder (in this case 188) and divide it by 16. This results in yet another quotient and
another remainder. The new quotient in this case is 11 (or B) and becomes H1. The new remainder in
this case is 12 (or C) and becomes H0.
Thus, 700 (dec) is 2BC (hex).
Figure 4-3 shows this base address set using the DIP switches.
Figure 4-3 Example of a Non-Standard Base Address
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