User`s guide

BDOS FUNCTION 2: CONSOLE OUTPUT
Entry Parameters:
Registers C: 02H
E: ASCII Character
The Console Output function sends the ASCII character from register E to the
logical console device, CONOUT:. When the Console Mode is in the default state
(see Section 2.2.1), Function 2 expands tab characters, CTRL-1, in columns of 8
characters, checks for stop scroll, CTRL-S, start scroll, CTRL-Q, and echoes charac-
ters to the logical list device, LST:, if printer echo, CTRL-P, has been invoked.
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BDOS Function Calls CP/M 3 Programmers Guide