$EE Code for electric water pump on AIR output

[dzidaV8]

Thanks!

So, the most basic solution would be to change this:

4935    CE 18 00            ldX    #$1800
4938    12 2F 02 05         brset    l_002f_fts_2_stat_byte, #%00000010, @7
493C    1D 00 01            bclr    0, X, #%00000001
493F    20 03               jr    @8
;
4941    1C 00 01        @7    bset    0, X, #%00000001

to this:

4935    CE 18 00            ldX    #$1800
4938    12 23 80 05         brset    L0023, #%10000000, @7
493C    1D 00 01            bclr    0, X, #%00000001
493F    20 03               jr    @8
;
4941    1C 00 01        @7    bset    0, X, #%00000001

And if I wanted some more functionality, then I'd insert a jump at 0x493C to additional subroutine in some unused space to test conditions to run pump w/o engine running.

Could you point me to some free space I could safely use?