User`s guide

BDOS FUNCTION 32: SET/GET USER CODE

Entry Parameters:

Registers C: 20H

Returned Value: E: OFFH (get) or User Code (set)

(no value)

A program can change, or interrogate the currently active user number by calling

Function 32. If register E = OFFH, then the value of the current user number is

returned in register A, where the value is in the range of 0 to 15. If register E is not

OFFH, then the current user number is changed to the value of E, modulo 16.

3-47

BDOS Function Calls CP/M 3 Programmers Guide