Routines
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FE15: Draw a room's doors and still things into its picture, and start the main loop
Entered at its end from ROOMST, with HL at the first record after the knight's and THIS_RECORD at 7. Each record is drawn now, once, if it is a door or still: nothing in the low five bits of +16, a thing that never moves and that CHE3D never updates. With bit 4 of GAME_FLAGS set, REDRAW_OBJECT draws it among the other still things only. When all are done the screen is copied to the clean copy again (RESTOR), so from now on they are part of the room's picture, drawn again only where something passes in front of them.
Then THINGS_NOTED is cleared and GAME_FLAGS set to 5 -- LIFE to be printed (bit 0) and the room's first pass (bit 2), everything else off, a freeze included -- and the main loop starts with its keys (MAIN_LOOP).
Input
HL The record
DRAW_STILL_THINGS FE15 PUSH HL IX = the record; THIS_RECORD = its number
FE16 POP IX
FE18 INC (IY+THIS_RECORD-V)
FE1B LD A,(IX+OBJ_KIND) A door: draw it
FE1E AND $0F
FE20 CP $01
FE22 JR Z,DRAW_STILL_THINGS_0
FE24 LD A,(IX+OBJ_WEIGHT) Anything else only if still
FE27 AND $1F
DRAW_STILL_THINGS_0 FE29 PUSH HL Draw it (REDRAW_OBJECT)
FE2A CALL Z,REDRAW_OBJECT
FE2D POP HL
FE2E LD DE,$0014 Next record
FE31 ADD HL,DE
This entry point is used by the routine at ROOMST.
DRAW_STILL_THINGS_1 FE32 LD A,(OBJECT_COUNT) Until the last in use
FE35 CP (IY+THIS_RECORD-V)
FE38 JR NZ,DRAW_STILL_THINGS
FE3A CALL RESTOR Copy the screen, still things and all, to the clean copy
FE3D LD (IY+THINGS_NOTED-V),$00 A new room's flags, and into the main loop
FE41 LD (IY+GAME_FLAGS-V),$05
FE45 JR PASS_KEYS
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