EXOS 2.1 Constants

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This document defines various constants which relate to EXOS version 2.1. This includes the addresses of certain system variables and all codes which are used by EXOS calls, including error codes. Many of these constants also appear in the EXOS kernel specification but are gathered together here for completeness.

Contents:

1. System Segment Addresses

2. EXOS Function Codes

3. Error Codes.

3.1 Warning Codes

3.2 General Kernel Errors

3.3 General Device Errors

3.4 Device Specific Errors

4. EXOS Variable Numbers

5. Software Interrupt Codes

6. Special Function Sub­Function Codes

7. Action Codes for System Extensions

8. Module Types for Load Files