Through the Trap Door: Routine at 53987

53987: Reset complex state data for first entity of class A to that stored in initial-state table

Initial-state table is at 59821.

Used by the routines at 37639 and 48417.

Input
A	Entity class value
IX	(Entry at 53994 only) Address of complex state data for an entity

53987

Load IX with address of complex state data for first entry in current level that has class A...

53990

PUSH IY

...

53992

POP IX

...

This entry point is used by the routine at 42064.

53994

LD IY,59821

Point IY at start of table of initial-state data for complex entities

53998

Advance IY to first entry in copied complex state data that has class A

54001

PUSH IX

Store IX (address of entry in complex state data to overwrite)

54003

LD B,E

Load B with 13 (DE set to 13 in routine at 54019)

54004

LD A,(IY+0)

Overwrite IX data entry with IY data...

54007

LD (IX+0),A

...

54010

INC IX

...

54012

INC IY

...

54014

DJNZ 54004

...

54016

POP IX

Restore IX (address of entry in complex state data just overwritten)

54018

RET

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