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I/o port mapping – Juniper Systems Allegro DOS Manual User Manual

Page 253

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Software Developer's Guide for DOS Page 8-19

I/O Port Mapping

Address

Function

080

Diagnostics Port

2F0 - 2F3

System Control Registers

2F8 - 2FF

COM2:

300 - 31F

Internal - Do Not Use

3D0 - 3DF

CGA Display

3E0 - 3E7

PC Card Controller