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Microsoft KB Archive/34433

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Interrupt Levels Used by Heath/Zenith 150/151 Computers PSS ID Number: Q34433 Article last modified on 09-23-1991 PSS database name: PSS

MS-DOS | CP/M-80


Some of the interrupt levels used by the Heath/Zenith 150/151 differ from the IBM standards, and can therefore cause some hardware conflicts. The following is a list of interrupts:

Level Device

0 Timer

1 Event Counter

2 ** Open

3 COM2:

4 ** Open

5 Hard-Disk Controller

6 COM1: and Floppy-Drive Controller

7 LPT1:, LPT2:, and LPT3:

Copyright Microsoft Corporation 1991.