Measurement Computing CIO-DAC08 - Manual (Page 10)

CIO-DAC08 User's Guide Installing the CIO-DAC08
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 Fi
shows the settings for the factory-default base
address of 300 hex.
gure 1
Figure 1. CIO-DAC08 base address switches
gure 1
SW
A9
A8
A7
A6
A5 HEX
200
100
80
40
20 9 8 7 6 5
In the default configuration shown in Fi , 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).
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) 3A0-3AF SDLC
1F0-1FF Hard disk (AT) 3B0-3BB MDA
200-20F Game control 3BC-3BB 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-DAC08 Base switch can be set for an address in the range of 000-3E0, so it should not be hard to find
a free address area for your CIO-DAC08. 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
390-39F, are free.
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