Measurement Computing CIO-DIO24 - Manual (Page 10)

CIO-DIO24 User's Guide Installing the CIO-DIO24
Hex Range Function Function Hex Range
0A0-0A1 8259 PIC #2 (AT) K (XT) 320-32F HARD DIS
0A0-0AF T) LLEL PRINTER NMI MASK (X 378-37F PARA
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-3BF 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
You can set the ba ess in the range of 000-3FC. I re not using IBM
ng cards o ich occupies these ad e CIO-DIO24 board's default address of
ree to use.
s not spec such as 390-39Fh, are not nd may ailable. Check your
for other O addresses.
pt leve
an input
evel on Pin 2,
IR Enable
.
er and
g table for some typical interrupt assignments on a
computer.
The CIO-DIO24 is shipped with the jumper in the "
X
" position, which means that no interrupt level is set
ace
se address switch to any addr f you a
prototypi r another board wh dresses, th
300h is f
Addresse ifically listed, reserved a be av
computer boards which may use I/
Interru l
The trigger logic on the CIO-DIO24 is quite simple. Pin 1 (
IR Input
) of the board's 37-pin connector is
jumper which maps the interrupt directly onto the PC bus. The signal to the bus is buffered. The buffer is
enabled by a LOW l
Interrupts are hardware-initiated software routines. Most hardware interrupts are assigned by the comput
are reserved for internal system use. Refer to the followin
(Figure 3). Leave the jumper in the default "X" position for now. If your software employs interrupt service
routines, it will direct you to select an IRQ level. Use the jumper block labeled
IR1
above the PC bus interf
(gold pins) if you want to set the interrupt.
IR1
2 3 4 5 6 7 X
Figure 3. Interrupt level select jumper (no interrupt level set)
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