Measurement Computing CIO-INT-32 - Manual (Page 7)

Certain address are used by the PC, others are free and may be used by the
CIO-INT32 and other expansion boards. We recommend BASE = 300H (768D) be
tried first.
Table 1. PC I/O Addresses
SERIAL PORT 3F8-3FF EGA 2B0-2BF
FLOPPY DISK 3F0-3F7 PARALLEL PRINTER 270-27F
SERIAL PORT 3E8-3EF ALT BUS MOUSE 23C-23F
CGA 3D0-3DF BUS MOUSE 238-23B
EGA 3C0-3CF EXPANSION UNIT (XT) 210-21F
PARALLEL PRINTER 3BC-3BF GAME CONTROL 200-20F
MDA 3B0-3BB HARD DISK (AT) 1F0-1FF
SDLC 3A0-3AF 80287 NUMERIC CO-P (AT) 0F0-0FF
SDLC 380-38F 8237 #2 (AT) 0C0-0DF
PARALLEL PRINTER 378-37F NMI MASK (XT) 0A0-0AF
HARD DISK (XT) 320-32F 8259 PIC #2 (AT) 0A0-0A1
PROTOTTYPE CARD 310-31F DMA PAGE REGISTERS 080-08F
PROTOTYPE CARD 300-30F CMOS RAM & NMI MASK (AT) 070-071
SERIAL PORT 2F8-2FF 8742 CONTROLLER (AT) 060-064
SERIAL PORT 2E8-2EF 8255 PPI (XT) 060-063
GPIB (AT) 2E0-2E7 8253 TIMER 040-043
EGA 2D0-2DF 8259 PIC #1 020-021
EGA 2C0-2CF 8237 DMA #1 000-00F
FUNCTION HEX
RANGE
FUNCTION HEX
RANGE
The CIO-INT32 BASE switch may be set for address in the range of 000-3F8 so it
should not be hard to find a free address area for you CIO-INT32. Once again, 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.
3.2 INTERRUPT LEVEL SELECT
If the software you are writing employs interrupt service routines, you will need to
select and enable interrupts from the CIO-INT32 to the PC bus.
The table below lists typical IRQ assignments. The IRQs described as
UNASSIGNED are typically available to you.
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