Topic       : TOS - The Operating System
Author      : 
Version     : tos.hyp (December 19, 2008)
Subject     : Programmieren/Atari
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HCP-Version : 5
Compiled on : Atari
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View Ref-File4.16.11  Ongibit                                                   TOS

 Name:         »GI bit on« - Set individual bits in the port A 
               register of the GI sound chip.

 Opcode:       30

 Syntax:       void Ongibit( int16_t bitno );

 Description:  The XBIOS routine Ongibit sets a bit in register A of 
               the GI sound chip. bitno specifies the value with which 
               the register should be ORed. The bits in this register 
               have the following meaning:

                Bit  Description

                 0   Floppy disk side select
                 1   Select drive A:
                 2   Select drive B:
                 3   RS-232 RTS
                 4   RS-232 DTR
                 5   Centronics strobe
                 6   PIN 3 monitor port
                 7   Unused
                     As of TOS030 of the TT, however Modem 4 (1) or 
                     LAN (0)

 Return value: The function does not return a result.

 Availability: All TOS versions.

 Group:        Interface programming

 See also:     Binding   Offgibit