| jetpac | Routines | 
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| 744c | ld l,(ix+$06) | L=Jetman Y speed (will be <= 63) | ||||||
| 744f | ld h,$00 | |||||||
| 7451 | add hl,hl | Multiply vertical X speed by 3 | ||||||
| 7452 | add hl,hl | |||||||
| 7453 | add hl,hl | |||||||
| 7454 | ld d,(ix+$02) | D=Jetman Y position | ||||||
| 7457 | ld a,($5dc8) | E=Jetman flying counter | ||||||
| 745a | ld e,a | |||||||
| 745b | bit 7,(ix+$04) | Move Jetman up if moving up | ||||||
| 745f | jp z,$7526 | |||||||
| 7462 | add hl,de | else move downwards | ||||||
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