Advantech PCLS-848-P, User Manual

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CHAPTER 2 INSTALLATION 7
Switch position (SW1)
7
8 Wait state(s)
W1 W0
O O O
O 1 2
1 0 4
1 1 6
2.2.2. Firmware Address Setting
The IEEE-488 interface driver routine is stored in the on-board EPROM. The memory
address of this firmware can be selected by SW2. The memory segment of the
firmware can be from hex 8000 to hex FC00. Factory setting is hex D000.
The range of these locations is out of the 640K system memory of the IBM PC, PC/
XT and PC/AT. However, choice of this location must be made to avoid any conflict
with other interface cards. When two or more IEEE-488 interface cards are used in one
PC, the location settings must be different in order to have different working space
although the firmware code is the same.
The SW2 positions 1 to 5 determine the address bits A18 to A14. Address bit A19 is
always 1. Address bits below A13 (included) are not cared.
*