Bb-electronics PCRTC User Manual download pdf (Page 16)

14 Documentation Number PCRTC2095 Manual

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

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

Appendix A. Hardware I/O Map

I/O Map of XT Class Machines

Hex Address Address Function in XT Class Machines

000-00F

DMA controller (8237A)

020-021

interrupt controller (8259A)

040-043

timer (8253)

060-063

PPI(8255A)

080-083

DMA page register (74LS612)

0A0-0AF

NMI - non maskable interrupt

200-20F

game port joystick controller

210-217

expansion unit

2E8-2EF

COM4 serial port

2F8-2FF

COM2 serial port

300-31F

prototype card

320-32F

hard disk

378-37F

parallel print

380-38F

SDLC

3B0-3BF

MDA - monochrome adapter and printer

3D0-3D7

CGA - color graphics adapter

3E8-3EF

COM3 serial port

3F0-3F7

floppy diskette controller

3F8-3FF

COM1 serial port

1 2 ... 11 12 13 14 15 16 17

Model PCRTC 1
Table of Contents 2
Chapter 2. Setup 4
Chapter 3. Operation 6
QuickBASIC Example: 12
Pascal Programming Example 12
C Programming Example 13
Chapter 4. Calculating Error 14
Appendix A. Hardware I/O Map 16

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