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5C3C: TV-FLAG - Flags associated with the television
Initialised by the routine at NEW, read by the routines at PO_TV_2, PO_STORE, PO_FETCH, TEMPS, CL_SET and CL_LINE, and updated by the routines at SA_CONTRL, PO_SCR, CLS, KEY_INPUT, ED_COPY, MAIN_EXEC, WAIT_KEY, CHAN_K, CHAN_S, AUTO_LIST, LIST, CLASS_07, CLASS_09 and INPUT. This system variable is accessed by some routines via the IY register at IY+$02.
Bit Description
0 Set when printing to the lower screen
1 Unused
2 Unused
3 Set when the input mode has changed
4 Set when an automatic listing is being produced
5 Set when the lower screen needs clearing
6 Unused
7 Unused
Input
Output
TV_FLAG 5C3C DEFB $00
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