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1642: THE 'CHANNEL 'S' FLAG' SUBROUTINE
The address of this routine is derived from an offset found in the channel code lookup table.
Input
Output
CHAN_S 1642 RES 0,(IY+$02) Signal 'using main screen' (reset bit 0 of TV-FLAG).
This entry point is used by the routine at CHAN_K.
CHAN_S_1 1646 RES 1,(IY+$01) Signal 'printer not being used' (reset bit 1 of FLAGS).
164A JP TEMPS Exit via TEMPS so as to set the colour system variables.
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