Measurement-computing PC104-DIO48 Manuale Utente Scaricare il pdf (Pagina 6)

The actual address is constructed by calculating the HEX or decimal

number Base Address Select Switches which corresponds to the base

address bits the PC104-DIO48 will respond to. For example, in Figure

2-1, switches 1 and 2 down, all others are up. Switch 1 = 200 hex (512

decimal) and switch 2 = 100 hex (256 decimal). When added together

they equal 300 hex (768 decimal).

Certain address are reserved for use by the PC (Table 2-1). Others are

free and can be used by the PC104-DIO48 and other expansion boards.

We recommend that BASE = 300 hex (768 decimal) be tried first. See

Figure 2-2 for the orientation of the switch block.

Table 2-1. PC 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 #2 (AT)0A0-0A1

PROTOTYPE CARD310-31FDMA PAGE REGISTERS080-08F

PROTOTYPE CARD300-30F

CMOS RAM & NMI MASK (AT)

070-071

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

SERIAL PORT2E8-2EF8255 PPI (XT)060-063

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

EGA2D0-2DF8259 PIC #1020-021

EGA2C0-2CF8237 DMA #1000-00F

FUNCTIONHEX

RANGE

FUNCTIONHEX

RANGE

The PC104-DIO48 BASE switch may be set for address in the range of

000 to 3F8 so it should not be hard to find a free address area for your

PC104-DIO48. Once again, if you are not using IBM prototyping cards

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

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

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Measurement-computing PC104-DIO48 Manuale Utente Pagina 6