Table of Contents
Please refer to the Modbus Plus Network Planning and Installation Guide when installing the SA85 or PC85 card in an IBM AT compatible computer.
The SA85 or PC85 card occupies 2K of host memory space. The base address is user-selectable. The most common location to install the card is 0xD0000. The table below lists the possible locations and describes other hardware that might be using the space.
|0x80000||Occupied by RAM in >512k systems|
|0x88000||Occupied by RAM in >512k systems|
|0x90000||Occupied by RAM in >512k systems|
|0x98000||Occupied by RAM in >512k systems|
|0xA0000||Used by EGA/VGA|
|0xA8000||Used by EGA/VGA|
|0xB0000||Used by MDA|
|0xB8000||Used by CGA|
|0xC0000||BIOS Extensions (possible EGA/VGA) minimum SA85 address|
|0xC8000||BIOS Extensions (hard disk controller)|
|0xD0000||Used by EMS memory (recommended location)|
|0xD8000||Used by EMS memory|
|0xE0000||BIOS Extensions (normally unused)|
|0xE8000||BIOS Extensions (normally unused)|
|0xF0000||System ROMs, BASIC|
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