Bb-electronics PCRTC User Manual download pdf (Page 17)

Documentation Number PCRTC2095 Manual 15

B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350

PH (815) 433-5100 -- FAX (815) 433-5105

Hardware I/O Map of AT Class Machines

Hex Address Address Function in AT Class Machines

000-01F

DMA controller #1 (8237A-5)

020-03F

interrupt controller #1 (8259A)

040-05F

timer (8254)

060-06F

keyboard (8042)

070-07F

NMI - non maskable interrupt & CMOS RAM

080-09F

DMA page register (74LS612)

0A0-0BF

interrupt controller #2 (8259A)

0C0-0DF

DMA controller #2 (8237A)

0F0-0FF

80287 math coprocessor

1F0-1F8

hard disk

200-20F

game port joystick controller

258-25F

Intel Above Board

278-27F

parallel printer port 2

2E8-2EF

COM4 serial port

2F8-2FF

COM2 serial port

300-31F

prototype card

378-37F

parallel printer 1

380-38F

SDLC or bisynch com 2

3A0-3AF

bisynch com 1

3B0-3BF

MDA - monochrome adapter

3BC-3BE

parallel printer on monochrome adapter

3C0-3CF

EGA - reserved

3D0-3D7

CGA - color graphics adapter

3E8-3EF

COM 3 serial port

3F0-3F7

floppy diskette controller

3F8-3FF

COM1 serial port

Any eight byte space not listed above and not used by any

other equipment in your system may be used for the serial port.

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Bb-electronics PCRTC User Manual Page 17

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