A
750 version
s_left 	s_right t_bottom t_top
 0   	10  	0	125	// comment: pos/minus sign
10   	18  	0	125	// comment: autopilot display: VVI 1000
18   	26  	0	125	// comment: autopilot display: VVI 100
26   	44  	0	125	// comment: autopilot display: VVI 0

positive/negative
Please notice that I arbitrary put a new digit -0 for positive or negative column and the t_coordinates have (2) as suffix, this means that it is not a rolling tape but it has 2 positions only (blank or 00)
behavior*:
- Blank until the VVI button is pushed to engage vertical speed mode.
- Indicates existing vertical speed when V/S button is pushed to engage vertical speed mode.