Measurement-computing PC104-AC5 Manual de usuario descargar pdf (Pagina 6)

A complete address is constructed by calculating the HEX or decimal number which

corresponds to all the address bits the board has been instructed to respond to. For

example, in Figure 2-1, switches 9 and 8 are DOWN, all others UP.

Using figure 2-1 as an example, address 9 = 200h (512D) and address 8 = 100h

(256D); added together they equal 300h (768D).

Certain address are used by the PC, others are free and may be used by the

PC104-AC5 and other expansion boards. We recommend BASE = 300h (768D) be

tried first.

2.1.1 I/O Addresses

The BASE switch may be set for an address in the range of 000-3FC so it should not

be hard to find a free address area for your board. If you are not using IBM

prototyping cards or some other board which occupies these addresses, 300-31Fh are

free to use. Refer to Table 2-1.

Addresses not specifically listed, such as 390-39Fh, are free.

Table 2-1. Computer I/O Addresses

SERIAL PORT3F8-3FFEGA2B0-2BF

FLOPPY DISK3F0-3F7PARALLEL PRINTER270-27F

SERIAL PORT3E8-3EFALT BUS MOUSE23C-23F

CGA3D0-3DFBUS MOUSE238-23B

EGA3C0-3CFEXPANSION UNIT (XT)210-21F

PARALLEL PRINTER3BC-3BFGAME CONTROL200-20F

MDA3B0-3BBHARD DISK (AT)1F0-1FF

SDLC3A0-3AF80287 NUMERIC CO-P (AT)0F0-0FF

SDLC380-38F8237 #2 (AT)0C0-0DF

PARALLEL PRINTER378-37FNMI MASK (XT)0A0-0AF

HARD DISK (XT)320-32F8259 PIC#20A0-0A1

PROTOTYPE CARD310-31FDMA PAGE REGISTERS080-08F

PROTOTYPE300-30FCMOS RAM & NMI MASK

(AT) CARD

070-071

SERIAL PORT2F8-2FF8742 CONTROLLER (AT)060-064

SERIAL PORT2E8-2EF82C55 PPI (XT)060-063

GPIB (AT)2E0-2E78253 TIMER040-043

EGA2D0-2CF8259 PIC #1020-021

EGA2C0-2CF8237 DMA #1000-00F

FUNCTIONHEX

RANGE

FUNCTIONHEX

RANGE

1 2 3 4 5 6 7 8 9 10 11 ... 23 24

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Measurement-computing PC104-AC5 Manual de usuario Pagina 6