Routines
Prev: DC71 Up: Map Next: DC92
DC79: Come to a stop facing +V
The distance on to the next multiple of 8 along his facing is taken from the low three bits of V (here), U, or their negatives (COAST_PLUS_U, COAST_MINUS_V, COAST_MINUS_U); 0 and he stands (STAND_ON_GRID). Otherwise he steps 4 if it is 4 or more, 2 if 2 or 3, and 1 if 1, and walks the step as usual (WALK_ON from offset 13), so he slows down 4, 2, 1 into place.
Input
IX The legs' record
COAST_PLUS_V DC79 LD A,(IX+$03) V's low byte
This entry point is used by the routines at COAST_PLUS_U and COAST_MINUS_V.
COAST_TO_GRID DC7C AND $07 On the grid: stand
DC7E JR Z,STAND_ON_GRID
DC80 NEG A: how far to the next multiple of 8, 1-7
DC82 ADD A,$08
DC84 LD C,$04 4 or more: step 4
DC86 CP C
DC87 JR NC,COAST_PLUS_V_0
DC89 SRL C 2 or 3: step 2
DC8B CP C
DC8C JR NC,COAST_PLUS_V_0
DC8E LD C,A The last 1
COAST_PLUS_V_0 DC8F LD A,C Walk that step
DC90 JR WALK_STEP
Prev: DC71 Up: Map Next: DC92