System information

FUNCTION 1: CONSOLE INPUT

Entry Parameters:

RegisterC: 01H

Returned Value:

The Console Input function reads the next console character to register A. Graphic characters,

along with carriage return, line-feed, and back space (CTRL-H) are echoed to the console. Tab

characters, CTRL-I, move the cursor to the next tab stop. A check is made for start/stop scroll,

CTRL-S, and start/stop printer echo, CTRL-P. The FDOS does not return to the calling program

until a character has been typed, thus suspending execution if a character is not ready.

FUNCTION 2: CONSOLE OUTPUT

Entry Parameters:

The ASCII character from register E is sent to the console device. As in Function 1, tabs are

expanded and checks are made for start/stop scroll and printer echo.

5.2 Call Conventions CP/M Operating System Manual

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