Through the Trap Door: Routine at 46418

46418: Graphic layout routine: (255) Load HL with stored coordinates and return from drawing

Note that when returning from another block of graphic layout data, the current attribute stored at 34270 (and set in the called block) is not preserved. Upon returning, the current attribute value is cleared.

The x- and y-coordinates to start drawing next time are loaded into HL from 34281 by the routines at 46442 (graphic layout routine 254) or 45965 (obtained from simple / complex state data).

Used by the routines at 45999 and 46218.

Output
B	Do-not-recalculate-display-buffer-address flag (0)
H	Current x-coordinate
L	Current y-coordinate

46418

XOR A

Set current attribute to zero

46419

LD (34270),A

46422

LD HL,(34281)

Load HL with base x- and y-coordinates

46425

LD B,A

Set B to zero

46426

RET

Return