Measurement Computing CIO-DAS08 - Manual (Page 10)

CIO-DAS08 User's Guide Installing the CIO-DAS08
Base address
Before you install the CIO-DAS08 in your computer, set the base address by using the dip switches labeled
ADDRESS located on the board. The easiest way to set the base address switch is to let InstaCal show you the
correct settings. However, if are already familiar with setting ISA base addresses, you may use the base address
switch description below to guide your base address selection.
Unless there is already another board in your system using address 300 hex (768 decimal), leave the switches as
they are set at the factory. The example shown in
shows the settings for the factory-default base
address of 300 hex.
Figure 2
Figure 2. Base address switches (300h shown)
Figure 2
SW
A9
A8
A7
A6
A5
A4
A3 HEX
200
100
80
40
20
10
08
9 8 7 6 5 4 3
ADDRESS
In the default configuration shown in , addresses 9 and 8 are DOWN, and all others are UP.
Address 9 = 200 hex (512 decimal) and address 8 = 100 hex (256 decimal); when added together they equal
300 hex (768 decimal).
A complete address is constructed by calculating the hexadecimal number which corresponds to all the address
bits the CIO-DAS08 can respond to. The range of base addresses is 000h to 3F0h. Certain address are used by
the PC, others are free and may be used by the CIO-DAS08 and other expansion boards. Refer to the following
table.
Disregard the numbers printed on the switch
When setting the base address, refer to the numbers printed in white on the printed circuit board.
PC I/O Addresses
Hex Range Function Hex Range Function
000-00F 8237 DMA #1 2C0-2CF EGA
020-021 8259 PIC #1 2D0-2DF EGA
040-043 8253 TIMER 2E0-2E7 GPIB (AT)
060-063 8255 PPI (XT) 2E8-2EF SERIAL PORT
060-064 8742 CONTROLLER (AT) 2F8-2FF SERIAL PORT
070-071 CMOS RAM & NMI MASK (AT) 300-30F PROTOTYPE CARD
080-08F DMA PAGE REGISTERS 310-31F PROTOTYPE CARD
0A0-0A1 8259 PIC #2 (AT) 320-32F HARD DISK (XT)
0A0-0AF NMI MASK (XT) 378-37F PARALLEL PRINTER
0C0-0DF 8237 #2 (AT) 380-38F SDLC
0F0-0FF 80287 NUMERIC CO-P (AT) 3B0-3BB SDLC
1F0-1FF HARD DISK (AT) 3BC-3BF MDA
200-20F GAME CONTROL 3C0-3CF PARALLEL PRINTER
210-21F EXPANSION UNIT (XT) 3C0-3CF EGA
238-23B BUS MOUSE 3D0-3DF CGA
23C-23F ALT BUS MOUSE 3E8-3EF SERIAL PORT
270-27F PARALLEL PRINTER 3F0-3F7 FLOPPY DISK
2B0-2BF EGA 3F8-3FF SERIAL PORT
The CIO-DAS08 base switch can be set for an address in the span of 000-3F0h, so it should not be hard to find
a free address area. If you are not using IBM prototyping cards, or some other board which occupies these
addresses, then 300-31F HEX are free to use. Addresses not specifically listed — such as 390-39Fh — are free.
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